测绘专业英语翻译第二单元
测绘工程专业英语课文全部翻译
Section 2 The Reliability of a Survey and Errors测量误差的可靠性Since every technique of measurement is subject to unavoidable error, surveyors must be aware of all sources and types of error and how they combine. If the accuracy of a measurement is defined as the nearness of that value to its true value (a quantity we can never know) then a surveyor must ensure that the techniques he chooses will produce a result that is sufficiently accurate. He must know, therefore, how accurate he needs to be, how to achieve this accuracy and how to check that the required accuracy has been achieved.由于每个测量技术是不可避免的误差，测量员必须知道的所有误差的来源和类型，以及它们是如何结合。
如果测量的准确性，其真正的值（我们可以永远不知道的数量）的接近程度，该值被定义为，然后测量员必须确保他选择的技术将产生一个结果，是足够精确的。
因此，他必须知道他需要的精度如何，如何实现这一目标的准确性和如何检查所要求的精度已经达到。
Accuracy requiredWhen surveying to produce a plan, the accuracy required is defined by the scale of the plot, since there should be no plottable error in the survey data. A good draughtsman can plot a length to within 0.25 mm and so, if a plan of an area is required at a scale of 1/1000, i.e., 1 mm on the plan represents 1 m on the ground, the smallest plottable distance is 0.25 m. Thus, for a survey at 1/1000 scale, all the measurements must be taken such that the relative positions of any point with respect to any other must be determined to 0.25 m or better.当测量一个平面时,精度通常是根据展图比例决定的，因为在绘图中不能有测量误差。
测绘英语unit22
译文:在基站模式下，基站接收机给移动接收机提供数据进行差分 改正。在移动站模式，基站接收机作为用户设备运行并从参考 站获得距离改正量，这些距离改正量用来改正基站的位置。
Unit 22
Real time differential(2)
Notes to the Text
4.When a receiver is used as a reference station and the RTCM option is installed, it computes differential corrections for up to 12 satellites converts those corrections to RTCM format and transmits the converted messages via its serial ports.
Unit 22
Real time differential(2)
Unit 22
Real time differential(2)
New words and Expressions along with：连同一起，与一道 checksum：检验码 linefeed [] v. 换行 troubleshooting [] v. 疑难解答 designated by： 被任命为；被称为 PRN （Pseudo Random Number）： 伪随机噪声码 baud rate： 波特率；传输速率 Issue of Data Ephemeris： 星历表数据期号 rover [] n. 漫游者；流浪者；漂泊者 be dedicated to： 奉献；从事于；献身于 complies with： 遵守 Radio Technical Commission for Maritime Services： 海事无线电技术委员 会 serial ports： 串行端口 slippage [] v. 滑动；滑移；下降
测绘专业英语翻译
Uuit1 What is Geomatics? （什么是测绘学）Geomatics Defined（测绘学定义）Where does the word Geomatics come from?（Geomatics－测绘或地球空间信息学，这个名词是怎么来的呢？）GEODESY+GEOINFORMATICS=GEOMATICS or GEO- for earth and –MATICS for mathematical or GEO- for Geoscience and -MATICS for informatics. （大地测量学＋地理信息学＝GEOMATICS测绘学或者 geo代表地球，matics代表数学，或者 geo代表地球科学，matics 代表信息学）It has been said that geomatics is many things to many people.（据说测绘学这个词对不同的人有不同的理解）The term geomatics emerged first in Canada and as an academic discipline; it has been introduced worldwide in a number of institutes of higher education during the past few years, mostly by renaming what was previously called “geodesy” or “surveying”, and by adding a number of computer science- and/or GIS-oriented courses.（这个术语【term术语】作为一个学科【academic discipline学科】第一次形成【emerge】于加拿大；在过去的几年里被全世界的许多高等教育研究机构所熟知，通常是以前的“大地测量学”或“测量学”在引入了许多计算机科学和GIS方向【或“基于GIS”】的课程后重新命名的。
测绘工程专业英语Unit 2
May 2007May 2007
Singapore English
Chinese-style interjections ay yaah! to express surprise or exasperation
ay yor! to express pain or wonder or both
Unit 2
What does “Englishes” here refer to?
---- The title “Englishes” in its plural form refers to the various styles of English.
Each of us works not just with one English but with many Englishes… As for those who speak English, we have
ay yer! indicating a reaction to something unpleasant and maybe unexptected che! expressing irritation or regret
May 2007May 2007
Natalie Knuth / Teresa Mattheß
close meaning 'put off' → Close the light.
Style is….
How Do We Discuss Writing Style?
• And just like we can talk about these other types of style using specific language, such as rap that is broken down into old school, gangsta, hip-hop, etc., writing style can be discussed through a few key factors: • Diction • Syntax • Tone • Use of Figurative Language
测绘专业英语翻译汇编
Uuit1 What is Geomatics? （什么是测绘学）Geomatics Defined（测绘学定义）Where does the word Geomatics come from?（Geomatics－测绘或地球空间信息学，这个名词是怎么来的呢？）GEODESY+GEOINFORMATICS=GEOMATICS or GEO- for earth and –MATICS for mathematical or GEO- for Geoscience and -MATICS for informatics. （大地测量学＋地理信息学＝GEOMATICS测绘学或者 geo代表地球，matics代表数学，或者 geo代表地球科学，matics 代表信息学）It has been said that geomatics is many things to many people.（据说测绘学这个词对不同的人有不同的理解）The term geomatics emerged first in Canada and as an academic discipline; it has been introduced worldwide in a number of institutes of higher education during the past few years, mostly by renaming what was previously called “geodesy”or “surveying”, and by adding a number of computer science- and/or GIS-oriented courses.（这个术语【term术语】作为一个学科【academic discipline学科】第一次形成【emerge】于加拿大；在过去的几年里被全世界的许多高等教育研究机构所熟知，通常是以前的“大地测量学”或“测量学”在引入了许多计算机科学和GIS方向【或“基于GIS”】的课程后重新命名的。
测绘专业英语翻译
Unit1 What is Geomatics? 3页Data plotting (presentation) is handled through the use of mapping and other illustrative computer programs; the presentations are displayed on computer screens (where interactive editing can occur) and are output on paper from digital plotting devices. 数据绘图（描述，表达）是通过使用绘图和其他示范的计算机程序；这种表达显示在电脑屏幕（可以进行交互式编辑）和通过数字绘图设备输出到纸上。
Once the positions and attributes of geographic entities have been digitized and stored in computer memory, they are available for use by a wide variety of users. Through the use of modem information technology (IT), geomatics brings together professionals in the following disciplines: surveying, mapping, remote sensing, land registration, civil and marine engineering, forestry, agriculture, planning and development, geology, geographical sciences, infrastructure management, navigation, environmental and natural resources monitoring, and computer science.Other Definitions of Geomatics.一旦地理实体的位置和属性已被数字化并存储在计算机的内存中，它们即可以被各种各样的用户使用。
测绘工程专业英语(全书翻译)
测绘工程专业英语(全书翻译)Uuit1 What is Geomatics? （什么是测绘学）Geomatics Defined（测绘学定义）Where does the word Geomatics come from?（Geomatics－测绘或地球空间信息学，这个名词是怎么来的呢？）GEODESY+GEOINFORMATICS=GEOMATICS or GEO- for earth and – MATICS for mathematical or GEO- for Geoscience and -MATICS for informatics. （大地测量学＋地理信息学＝GEOMATICS 测绘学或者 geo 代表地球，matics 代表数学，或者 geo 代表地球科学，matics 代表信息学）It has been said that geomatics is many things to many people.（据说测绘学这个词对不同的人有不同的理解）The term geomatics emerged first in Canada and as an academic discipline; it has been introduced worldwide in a number of institutes of higher education during the past few years, mostly by renaming what was previously called “geodesy” or “surveying”, and byadding a number of computer sciences and/or GIS-oriented courses.（这个术语【term 术语】作为一个学科【academic discipline 学科】第一次形成【emerge】于加拿大；在过去的几年里被全世界的许多高等教育研究机构所熟知，通常是以前的“大地测量学”或“测量学”在引入了许多计算机科学和 GIS 方向【或“基于 GIS”】的课程后重新命名的。
测绘专业英语翻译
Uuit1 What is Geomatics? （什么是测绘学）Geomatics Defined（测绘学定义）Where does the word Geomatics come from?（Geomatics－测绘或地球空间信息学，这个名词是怎么来的呢？）GEODESY+GEOINFORMATICS=GEOMATICS or GEO- for earth and –MATICS for mathematical or GEO- for Geoscience and -MATICS for informatics. （大地测量学＋地理信息学＝GEOMATICS 测绘学或者geo 代表地球，matics 代表数学，或者geo 代表地球科学，matics 代表信息学）It has been said that geomatics is many things to many people.（据说测绘学这个词对不同的人有不同的理解）The term geomatics emerged first in Canada and as an academic discipline; it has been introducedworldwide in a number of institutes of higher education during the past few years, mostly by renamingwhat was previously called “geodesy”or “surveying”, and by adding a number of computer scienceand/ or GIS-oriented courses.（这个术语【term 术语】作为一个学科【academic discipline 学科】第一次形成【emerge】于加拿大；在过去的几年里被全世界的许多高等教育研究机极所熟知，通常是以前的“大地测量学”或“测量学”在引入了许多计算机科学和GIS 方向【或“基于GIS”】的课程后重新命名的。
测绘工程专业英语课文全部翻译
Section 2 The Reliability of a Survey and Errors测量误差的可靠性Since every technique of measurement is subject to unavoidable error, surveyors must be aware of all sources and types of error and how they combine. If the accuracy of a measurement is defined as the nearness of that value to its true value (a quantity we can never know) then a surveyor must ensure that the techniques he chooses will produce a result that is sufficiently accurate. He must know, therefore, how accurate he needs to be, how to achieve this accuracy and how to check that the required accuracy has been achieved.由于每个测量技术是不可避免的误差，测量员必须知道的所有误差的来源和类型，以及它们是如何结合。
如果测量的准确性，其真正的值（我们可以永远不知道的数量）的接近程度，该值被定义为，然后测量员必须确保他选择的技术将产生一个结果，是足够精确的。
因此，他必须知道他需要的精度如何，如何实现这一目标的准确性和如何检查所要求的精度已经达到。
Accuracy requiredWhen surveying to produce a plan, the accuracy required is defined by the scale of the plot, since there should be no plottable error in the survey data. A good draughtsman can plot a length to within 0.25 mm and so, if a plan of an area is required at a scale of 1/1000, i.e., 1 mm on the plan represents 1 m on the ground, the smallest plottable distance is 0.25 m. Thus, for a survey at 1/1000 scale, all the measurements must be taken such that the relative positions of any point with respect to any other must be determined to 0.25 m or better.当测量一个平面时,精度通常是根据展图比例决定的，因为在绘图中不能有测量误差。
测绘工程专业英语翻译(1-8章)
测绘工程专业英语翻译Uuit1 What is Geomatics? （什么是测绘学） 2 Unit 2 Geodetic Surveying and Plane Surveying（大地测量与平面测量）7 Unit 3 Distance Measurement（距离测量）12 Unit 4 Angle and Direction Measurement（角度和方向测量）15 Unit 5 Traversing （导线测量）18 Unit 6 Methods of Elevation Determination（高程测量方法）22 Unit 7 Robotic Total Station （智能型全站仪）26 Unit8 Errors in Measurement（测量工作中的误差）30Uuit1 What is Geomatics? （什么是测绘学）Geomatics Defined（测绘学定义）Where does the word Geomatics come from?（Geomatics－测绘或地球空间信息学，这个名词是怎么来的呢？）GEODESY+GEOINFORMATICS=GEOMATICS or GEO- for earth and – MATICS for mathematical or GEO- for Geoscience and -MATICS for informatics. （大地测量学＋地理信息学＝GEOMATICS 测绘学或者geo 代表地球，matics 代表数学，或者geo 代表地球科学，matics 代表信息学）It has been said that geomatics is many things to many people.（据说测绘学这个词对不同的人有不同的理解）The term geomatics emerged first in Canada and as an academic discipline; it has been introduced worldwide in a number of institutes of higher education during the past few years, mostly by renaming what was previously called “geodesy” or “surveying”, and by adding a number of computer scienceand/or GIS-oriented courses.（这个术语【term 术语】作为一个学科【academic discipline 学科】第一次形成【emerge】于加拿大；在过去的几年里被全世界的许多高等教育研究机构所熟知，通常是以前的“大地测量学” 或“测量学”在引入了许多计算机科学和GIS 方向【或“基于GIS” 】的课程后重新命名的。
测绘工程专业英语翻译1~6
Uuit1 What is Geomatics? （什么是测绘学）Geomatics Defined（测绘学定义） Where does the word Geomatics come from?（Geomatics－测绘或地球空间信息学，这个名词是怎么来的呢？）GEODESY+GEOINFORMATICS=GEOMATICS or GEO- for earth and – MATICS for mathematical or GEO- for Geoscience and -MATICS for informatics. （大地测量学＋地理信息学＝GEOMATICS 测绘学或者 geo 代表地球，matics 代表数学，或者 geo 代表地球科学， matics 代表信息学）It has been said that geomatics is many things to many people.（据说测绘学这个词对不同的人有不同的理解） The term geomatics emerged first in Canada and as an academic discipline; it has been introducedworldwide in a number of institutes of higher education during the past few years, mostly by renaming what was previously called “geodesy” or “surveying”, and by adding a number of computer scienceand/or GIS-oriented courses.（这个术语作为一个学科第一次形成于加拿大；在过去的几年里被全世界的许多高等教育研究机构所熟知，通常是以前的“大地测量学”或“测量学”在引入了许多计算机科学和 GIS 方向的课程后重新命名的。
测绘工程专业英语翻译
Uuit1 What is Geomatics? （什么是测绘学）Geomatics Defined（测绘学定义）Where does the word Geomatics come from?（Geomatics－测绘或地球空间信息学，这个名词是怎么来的呢？）GEODESY+GEOINFORMATICS=GEOMATICS or GEO- for earth and - MATICS for mathematical or GEO- for Geoscience and -MATICS for informatics. （大地测量学＋地理信息学＝GEOMATICS 测绘学或者 geo 代表地球，matics 代表数学，或者 geo 代表地球科学，matics 代表信息学）It has been said that geomatics is many things to many people.（据说测绘学这个词对不同的人有不同的理解）The term geomatics emerged first in Canada and as an academic discipline; it has been introduced worldwide in a number of institutes of higher education during the past few years, mostly by renaming what was previously called “geodesy” or “surveying”, and by adding a number of computer science and/or GIS-oriented courses.（这个术语【term 术语】作为一个学科【academic discipline 学科】第一次形成【emerge】于加拿大；在过去的几年里被全世界的许多高等教育研究机构所熟知，通常是以前的“大地测量学” 或“测量学”在引入了许多计算机科学和 GIS 方向【或“基于GIS”】的课程后重新命名的。
(完整word)测绘专业英语单词
(完整word)测绘专业英语单词Chapter 1Geomatics 测绘学Surveying 测量学Geodesy 测地学Geosciences 地球科学Surveying and mapping 测绘学Surveying and mapping engineering 测绘工程Geoinformatics 地理信息学Geodetic network 大地控制网Land Surveyor 土地测量员Photogrammetriest 摄影测量员Practitioner 从业者Topographic map 地形图Geographic information system 地理信息系统Aerial photogrammetry 航空摄影测量学Remote sensing 遥感Cartography 地图制图学Computer graphics 计算机图形学Global navigation satellite system GNSSGlobal position system GPS Environmental visualization 环境可视化Geographic information system GIS Geographic referenced information 地理参考信息Landforms 地形Underground geological structure 地下地质构造Hydrology 水文学Mineral resources 矿产资源Topographic maps 地形图Geodynamic phenomena 地球动力学现象Polar motion 极移Crustal motion 地壳运动Earth tides 地球潮汐Sphere 球（体）Spheroid 球体Ellipse 椭圆Ellipsoid 椭圆体，椭球Surveying station 测站Geodetic control points 大地控制点With permanent monuments 永久标志Curved surface 曲面Straight line 直线Plane 平面Precise instrument 精密仪器Reference coordinat e 参考坐标Contour maps 等值线图Three dimensional model 三维模型Analog or digital forms 模拟或数字形式Specialized illustration software 专业插图软件Data acquisition 数据获取Data representation 数据表达Manipulate 处理，操作Data storage 数据存储Data preprocessing 数据预处理Longitude latitude altitude 经度、纬度、高度Regional navigation system 地区导航系统Analog photogrammetry 模拟摄影测量Analytical photogrammetry 解析摄影测量Digital photogrammetry 数字摄影测量Plotter 绘图机Passive remote sensing/active remote sensingFilm photography 胶片Infrared sensors 红外感应Charge coupled devices 电荷耦合器件Radiometer 辐射计Backscattered 反向散射Passive/active sensor/reflector 被动/主动传感器/反射器Henan polytechnic university Geographic data 地理数据Reference spheroid 参考椭球体Curved surface 曲面Analogy form 模拟模式Radio signal 无线信号Laser 激光(完整word)测绘专业英语单词Chapter 2Analog forms 模拟形式Paper plan 平面图Report table 报告表Three dimensional mathematical model 三维数学模型Horizontal and vertical distances 水平距离和垂直距离Determining Elevations 确定高程Direction 方向Location 位置Volume 体积（量）Portray graphically生动描绘Profile/cross section 侧面/横断面Longitudinal section 纵剖面Diagram 图表/示意图Optical theodolite 光学经纬仪Digital level 数字水准仪Electronic Distance Measurement （EDM）Total station 全站仪Aerial photogrammetry 航空摄影Satellite observation 卫星观测Inertial surveying 惯性测量Laser ranging techniques 激光测距技术Large volume of data 大量数据Rigorous processing 严密加工工艺Field/office work 野外/室内工作Conventional construction engineering projects 传统建设工程项目Property surveying 权属调查Geology 地质学 geophysics地球物理biology生物 agriculture 农业forestry 林业 hydrology 水文oceanography 海洋学Geography地理学Distance measurement 距离测量Linear 线性物 non-Spherical earth 球面地Slant 倾斜Tape 卷尺Telescope view望远镜视场electro-optical distance measuring 光电测距Earth gravity field 地球重力场Plume lines 铅垂线plastic tapes 塑料尺Poly tapes 塑料尺Steel types 钢尺Marking pole 花杆marking pin 测杆spring balance 弹簧秤Collimation axis 视准轴plumb bob 铅锤Invar tapes 因瓦尺Coefficient 系数Metric units 米制单位Foot units 英制单位Metric 公制，米制Meter 米Decimeter 分米Centimeter 厘米Minimeter 毫米Kilometer 千米Tacheometry 视距测量Theodolite tacheometryoptical resolutionOrdinary taping 普通丈量Precise taping 精密丈量Thermal expansion 热膨胀fixed-angle intercept截取一个固定角stadia interval factorstadia system 视距系统level rod 水准尺Plane table 平板仪line of sight 视线horizontal stadia principle 水平视距原理stadia interval 视距间隔 factor 常数stadia hairs 视距丝Principle focus 主焦点detail surveys 碎步测量topographic surveys 地形测量Leveling 水准测量electronic distance measurement 电子测距仪Geodimeter Inc光电测距仪公司terrain conditions 地形条件(完整word)测绘专业英语单词Radio waves 无线电波Identical velocities 相同速度Light velocity 光速Vacuum 真空operational range 测距Microwave systems 微波系统Light wave systems 光波系统Infrared systems 红外系统Wavelength band 波段Transmitted signals 传播信号airborne particles 浮尘Traversing 导线测量Precise taping 精密丈量Curvature 曲率Mean sea level MSLPermanent points/benchmarks 基准参照Trigonometric or indirect leveling 三角高程测量direct or spirit leveling 水准测量stadia leveling 视距测量different leveling 差分水准Point in question 待求点self-reducing tacheometer 自降速测仪Barometric leveling 气压高程测量Gravimetric leveling 重力高程测量mutually perpendicular axes Standard deviations 标准差earth curvature and refraction Annexed leveling line 附和水准路线spur leveling line 支水准路线closed leveling line 闭合水准路线preclude 排除slope distance 斜距vertical angle 竖直角Zenith angle 天顶角National vertical datum 国家高程基准theodolite 经纬仪 transitangles of elevation 仰角 minus anglesangles of depression 俯角 down anglesreciprocal vertical angle observation 垂直角对测degree minute second 度分秒the sexagesimal system 六十进制系统radian 弧度topographic detail points 地形碎部点points to be set out 待放样点clinometer 测角仪/倾斜仪sextant 六分仪compass 罗盘true meridian direction 真子午线方向true north direction 正北方向meridian plane 子午面gyro theodolite 陀螺经纬仪magnetic meridian direction 磁北方向azimuths 方位角coordinate north direction 坐标北方向coordinate axies direction clockwise direction 顺时针方向counterclockwise direction 逆时针方向bearing/orientation 方位、方向quadrant 象限horizontal circle 水平度盘circular protractors 圆形量角器geometric conditions 几何条件astronomic 天文学的,极大的magnetic poles 磁极gauss coordinate system 高斯坐标系coordinate azimuth 坐标方位角meridian 子午圈/线azimuthal projection 方位角投影commencing on 开始face left 盘左bisected bisect 一分为二binary 二进制的horizontal scale 水平度盘比例尺upper plate clamp 上盘制动夹subtract 减法，扣除arbitrary points 任意点primary control 一级控制triangulation 三角法trilateration 三边法intersection 交会法resection 后方交会traversing 导线测量trigonometric proposition 三角定理law of sines 正弦定理(完整word)测绘专业英语单词law of cosines 余弦定理forward intersection 前方交会side intersection 侧方交会steel tapes 钢尺hydrographic surveyspur/stub traverse 支导线geometric closure 几何形状闭合connection/annexed traverse 附合导线Closed traverse 闭合导线Normal calculation 坐标正算inverse calculation 坐标反算Stadia hair 视距丝Cross hair 十字丝Pulse method 脉冲法Phase different method 相差法Modulated light beam 调制光束Dividing scale tape 刻线尺Reflect 反射disperse散射 radiate 辐射Refract折射 diffract 衍射 diffuse 漫射Compensator 补偿器Ralative precision 相对精度Absolute precision 绝对精度Horizontal distance 水平距离Benchmark 水准基准点Alidade 照准部Automatic level 自动安平水准仪Nominal factor 名义因子Construction maps 施工图Air density 空气密度Horizontal braking screw 水平制动螺旋Charpter 3plane trigonometry 平面三角orthogonal projection 正射投影reference ellipsoid 参考椭球面geoid 大地水准面landmass 陆地equipotential surface 等势面theoretical surface 理论面perpendicular 垂直gravity potential 重力势planimetric position 平面位置orthometric heights 正高Geodetic height 大地高semi-major axis 长半径minor axis 短轴plumb bob line 垂线spirit bubble 水准泡horizontalized 使整平flattening 扁率ellipsoidal/geodetic distance 大地距best fitting 最佳拟合global geocentric ellipsoid 全球地心参考系geodetic reference system 1980 大地测量参考系portrary 描绘conformality 正形性at expense of 以牺牲—为代价Arbitrary projection 任意投影Equidistant projection 等距投影Easel plane 承影面Cylindrical projection 圆柱投影Conic projection 圆锥投影Azimuthal/planar projection 方位投影Normal/regular axis tangent conic projection正轴切圆锥投影Normal/regular axis secant conic projection(完整word)测绘专业英语单词正轴割圆锥投影Tangent planar projectionNormal axis tangent planarprojection正轴切面投影Transverse axis tangent planarprojection横轴切面投影Oblique axis tangent planarprojection斜轴切面投影Graticule of normal conic projection 正轴圆锥投影格网Cylinder 圆柱体Gauss kruger projection=conformal（equal angle）transverse tangent elliptic cylindrical projectionUniversal transverse mercator UTM Rules of thumb 经验法则Geodetic datum 大地测量基准World geodetic system 84Standard parallels 标准纬线Meridian 子午线,子午圈，经线Mass anomaly质量异常Geodetic latitude 大地维度Geodetic longitude 大地经度Translation parameter 平移参数Rotation parameter 旋转参数Scale parameter 尺度参数Rotation axis 旋转轴Backsight 后视Leveling rod reading 水准尺读数Height difference 高差Notional leveling origin 国家水准原点Coordinate conversion 坐标转换Smooth surface 光滑表面Normal calculation 正算Normal line 法线Survey specification 测量规范Dimension of the ellipsoid 椭圆的尺寸Chapter 4Direct measurement 直接测量Geometric formulas 几何公式Three broad categories 三大范畴Blunders/mistakes=gross errors Systematic errors 系统误差Magnitude 量级Algebraic sign 代数符号Calibration 校准，标准化Random errors 随机误差Gaussian distribution 高斯分布Law of probability 概率Most probable value 最或然值Points of inflexion 拐点Square root 平方根Probability density function 概率密度函数Normal error distribution curve 正态分布曲线Normal random variable 正态随机变量Frequency histogram 频率直方图Standard deviation 标准差Arithmetic mean 算术平均值Error propagation 误差传播Partial derivative 偏导数Mean square error 中误差Least squares adjustment 最小二乘平差Superfluous measurement 多余测量Instrumental error 仪器误差Redundant measurement 冗余误差Optimal combination 最优组合Matrix/array 矩阵Functional model 函数模型Stochastic model 随机模型Statistical properties 统计特性(完整word)测绘专业英语单词Variance/covariance matrix 方差/协方差矩阵Weighting matrix 权阵Weihted adjustment 加权平差Conditional adjustment 条件平差Parametric adjustment 参数平差Algebraic sum 代数和Geometric check 几何检核Chapter 5Cartography 地图制图学Map compilation 地图编制Map decoration 地图整饰Contour map 等高/值线图Neat line 图表边线Coordinate gratitude/grid 坐标网格Inset 嵌图Bar scale 图解比例尺Thematic map 专题图Topographic map 地形图topological map 拓扑地图Electronic map 电子地图Analytic stereo plotter 解析立体绘图仪Data visualization 数据可视化Image processing 图像处理Spatial analysis 空间分析Specialized illustration software 专门插图软件Laser rangefinders 激光测距仪Computer aided design CAD 计算机辅助设计VectorRasterGeometrical principles 几何原理Geospatial information 地理空间信息Zoom in 放大 out 缩小Graphic scale bar 图解比例尺Map page space 图面空间C++ application programming interface API Chapter 6Global navigation satellite system GNSSGlobal position system GPSOrbital plane 轨道平面Orbital altitude 轨道高度Medium earth orbit /MEO 中地球轨道Carrier wave 载波Absolute positioning 绝对定位Relative positioning 相对定位Static positioning 静态定位Dynamic positioning 动态定位Base station 基站Real time kinematic RTK 实时动态定位Antenna 天线Post processing 后处理Ground based transmitter 地面发射机Geostationary orbit 对地静止轨道GPS receiver GPS接收机Monitor station 监控站Mobile /Roving station 流动站Differential GPS。
测绘英语unit2
自动 安平 水准 仪
DS03高 精密自 动安平 水准仪
Unit 2 Levels
Unit 2 Levels
Unit 2 Levels
New words and Expressions furnish [5f[:niF] vt. 装备；供应，提供 neglect [ni5glekt] vt. 忽视，疏忽 dumpy [5dQmpi] a. 矮胖的，短而粗大的 dumpy level： 定镜水准仪 tilt [tilt] vt. 使倾斜 tilting level： 微倾水准仪 automatic level： 自动安平水准仪 assembly [[5sembli] n. 部件；联合；拼贴 distinctive [di5stiNktiv] a. 区别性的；有特色的 complicated [5kCmplikeitid] a. 结构复杂的；难懂的 backlash [5bAklAF] n. 齿隙，隙动差 gradient [5greidj[nt] n. 坡度，斜率；a. 倾斜的
摆
随之发生的；必然的 假如
恢复；修复 夹子，制动装置 图像；模块；结构 估计，估算，
estimate [5estimit9 5estimeit] vt.
评价
stadia [5steidj[] n. staff [sta:f] n. 视距仪，视距尺；视距法；视距测量 标尺；杆
base-plate： (仪器)底座，基座
Text 译文：水准泡C1用来整平，当仪器旋转轴
竖直时，必须vels ．In this type, the telescope C is pivoted near its
center on a short horizontal axis supported by the component B. When the setting, or tilting, screw B1, is turned, the eyepiece end of the telescope is raised or lowered, and this movement is resisted by the compression spring B2 so that the movement is free from looseness or backlash. 译文：在这种情况下，望远镜C在一个较短的由B部 分支撑的水平轴上绕其自身中心附近旋转。当设 定好的或倾斜的螺旋B1旋转时，望远镜目镜就会 上升或下降，弹簧B2的挤压力会阻挠这种运动， 以使其不至过于松动或受到后坐力。
测量专业常用英语翻译
测量专业常用英语翻译短语或词组中线 midline边线 sideline向左/右移动 left/right前进 forward后退 back路基 subgrade路面 Pavement岔口 fork交叉口 intersection十字路口 crossroads测量 measurement放线Actinomyces中桩 medium pile边桩 edge of pile水平测量Level measurement导线 wire闭合导线 closed traverse附合导线 Connecting traverse 曲线Curve水准仪 Level全站仪Total Station架子 Shelf塔尺 Foot tower线坠Line falling钢尺 Steel band tape量距离 Distance高程 Elevation每米 per meter混凝土Concrete沥青Asphalt石灰Lime水沟Ditch交点Nodal圆缓点 Ease-point circle缓圆点 Ease dots直缓点Direct relief point曲线中点Curve midpoint 边坡Slope渗水Seepage排水沟 Drainage防雨Rainproof防水Waterproof加固Reinforcement 防护Protection安全防护Security 安全帽Helmets水泥Cement 沙石Gravel沙子SandAsphalt 沥青base基层sub base 底基层borrow material 取土土方borrow area取土场地Spoil弃土culvert 涵管fill 土方lot 标段pavement layer结构层路肩shoulder spoiler Carriageway 行车道Site 现场QA quality assurance 质量保证QC quality control 质量监控规范Norms安平精度 setting accuracy比例尺 scale比例误差 proportional error闭合差 closure闭合差 closing error闭合导线 closed traverse闭合水准路线 closed leveling line边长中误差 mean square error of side length边交会法 linear intersection边角测量 triangulateration边角交会法 linear-angular intersection标称精度 nominal accuracy标尺 rod标尺 staff标准差 standard deviation参考数据 reference data参考效应 reference effect参数平差，*间接平差 parameter adjustment侧方交会 side intersection测标 [measuring] mark测杆 measuring bar测高仪 Altimeter测绘标准 standards of surveying and mapping测绘仪器 instrument of surveying and mapping测角中误差 mean square error of angle observation测量标志 survey mark测量规范 specifications of surveys测量控制网 surveying control network测量平差 adjustment of observation测量平差 survey adjustment测量学 surveying测线 survey line测站 station垂线偏差改正 correction for deflection of the vertical 垂线偏差改正 correction for deflection of the vertical 大地方位角 geodetic azimuth导线边 traverse leg导线测量 traverse survey导线点 traverse point导线横向误差 lateral error of traverse导线角度闭合差 angle closing error of traverse导线结点 junction point of traverses导线曲折系数 meandering coefficient of traverse导线全长闭合差 total length closing error of traverse 导线网 traverse network导线相对闭合差relative length closing error of traverse导线折角 traverse angle导线纵向误差 longitudinal error of traverse独立坐标系 independent coordinate system对中杆 centering rod方位角中误差 mean square error of azimuth方向观测法 method by series方向观测法 method of direction observation放样测量 setting-out survey附合导线 connecting traverse附合水准路线 annexed leveling line附加位 additional potential复测法 repetition method高程导线 height traverse高程点 elevation point高程基准 height datum高程控制测量 vertical control survey高程控制点 vertical control point高程控制网 vertical control network高程系统 height system高程中误差 mean square error of height工程控制网 engineering control network工程水准仪 engineer's level公路工程测量 road engineering survey横断面图 cross-section profile后方交会 resection缓和曲线测设 spiral curve location缓和曲线测设 transition curve location基线 base line基线测量 base line measurement基线网 base line network基准台，*差分台 track station基准纬度 latitude of reference极坐标定位，*距离方位定位point coordinate positioning极坐标定位方法,*方位距离定位方法 azimuth distance positioning method极坐标定位方法，*方位距离定位方法 polar positioning method预制涵管precast culvert路缘石kerbstone压实compact填筑fill基底foundation级配碎石gradation crush-stoneCoat 涂层摊铺pavement透层prime双表double seal面层surface骨料aggregate稀浆封层slurry桥bridge梁beam桥面板deck墩柱pier承台cushion cap桩基pile钻孔bore维护maintenance处理treatment附属auxiliary腐蚀corrosion砌石stone-pitching石笼gabion护栏guardrail标杆sign post围栏railing路标1.guide post 2.signpost交通标志traffic sign标线road marking道路专用区road reserved结构structure模版shutter 饰面finishing脚手架falsework结构钢structure steel预压pre pressing预制precast公差tolerance安全岛island额外extra施工工艺construction method 申请statement方案scheme路肩断点shoulder breakpoint 护栏parapet wall人行道foot walk检查井chamber管道pipeline取样sample挖方cut section填方fill section道路专用区road reserve倒角chamfer模版shutter伸缩缝expansion joint独轮车wheelbarrow锤子hammer砖块brick预处理pretreatment预涂premix。
测绘专业英语课文翻译
Geodetic Surveying and Plane SurveyingSurveying has been traditionally defined as the art and science of determining the position of natural and artificial features on, above or below the earth’s surface; and representing this information in analog form as a contoured map, paper plan or chart, or as figures in report tables, or in digital form as a three dimensional mathematical model stored in the computer. As such, the surveyor/geodesist dealt with the physical and mathematical aspect of measurement. The accurate determination and monumentation of points on the surface of the Earth is therefore seen as the major task.Though these surveys are for various purposes, still the basic operations are the same---they involve measurements and computations or, basically, fieldwork and office work. There are many different types of surveys such as land surveys, route surveys, city surveys, construction surveys, hydrographic surveys, etc., but generally speaking, surveying is divided into two major categories: geodetic and plane surveying.Surveys will either take into account the true shape of the Earth（Geodetic surveys）or treat the earth as a flat surface(Plane surveys). Additionally, surveys are conducted for the purpose of positioning features on the ground(Horizontal surveys), determining the elevation or heights of features(Vertical surveys) or a combination of both.Geodetic SurveyingThe type of surveying that takes into account the true shape of the earth is called geodetic surveying.This type of survey is suited for large areas and long lines and is used to find the precise location of basic points needed for establishing control for other surveys. In geodetic surveys, the stations are normally long distances apart, and more precise instruments and surveying methods are required for this type of surveying than for plane surveying.Widely spaced, permanent monuments serve as the basis for computing lengths and distances between relative positions. These basic points with permanent monuments are called geodetic control survey points, which support the production of consistent and compatible data for surveying and mapping projects. In the past, ground-based theodolites, tapes, and electronic devices were the primary geodetic field measurements used. Today, the technological expansion of GPS has made it possible to perform extremely accurate geodetic surveys at a fraction of the cost.A thorough knowledge of the principles of geodesy is an absolute prerequisite for the proper planning and execution of geodetic surveys.In Geodetic Surveys, the shape of the earth is thought of as a spheroid, although in a technical sense, it is not really a spheroid. Therefore, distances measured on or near the surface of the earth are not along straight lines or planes, but on a curved surface. Hence, in the computation of distances in geodetic surveys, allowances are made for the earth’s minor and major diameters from which a spheroid of reference is developed. The position of each geodetic station is related to this spheroid. The positions are expressed as latitudes(angles north or south of the Equator) and longitudes(angles east or west of a prime meridian) or as northings and eastings on a rectangular grid.A geodetic survey establishes the fundamentals for the determination of the surface and gravity field of a country. This is realized by coordinates and gravity values of a sufficiently large number of control points, arranged in geodetic and gravimetric networks. In this fundamental work, curvature and the gravity field of the earth must be considered.The type of surveying in which the mean surface of the earth is considered a plane, or in which the curvature of the earth can be disregarded without significant error, generally is called plane surveying. The term is used to designate survey work in which the distances or areas involved are of limited extent. With regard to horizontal distances and directions, a level line is considered mathematically straight, the direction of the plumb line is considered to be the same at all points within the limits of the survey, and all angles are considered to be plane angles. To make computations in plane surveying, you will use formulas of plane trigonometry, algebra, and analytical geometry. For small areas, precise results may be obtained with plane surveying methods, but the accuracy and precision of such results will decrease as the area surveyed increases in size. For example, the length of an arc 18.5 km long lying in the earth’s surface is only 7mm greater than the subtended chord and, further, the difference between the sum of the angles in a plane triangle and the sum of those in a spherical triangle is only 0.51 second for a triangle at the earth’s surface having an area of 100km2 . It will be appreciated that the curvature of the earth must be taken into consideration only in precise surveys of large areas.A great number of surveys are of the plane surveying type.Surveys for the location and construction of highways, railroads, canals, and in general, the surveys necessary for the works of human beings are plane surveys, as are the surveys made to establish boundaries, except state and national. However, with the increasing size and sophistication of engineering and other scientific projects, surveyors who restrict their practice to plane surveying are severely limited in the types of surveys in which they can be engaged. The operation of determining elevation usually is considered a division of plane surveying. Elevations are referred to the geoid. The geoid is theoretical only.It is the natural extension of the mean sea level surface under the landmass. We could illustrate this idea by digging an imaginary trench across the country linking the Atlantic and Pacific oceans.If we allowed the trench to fill with seawater, the surface of the water in the trench would represent he geoid. So for all intents and purposes, the geoid is the same as mean sea level. Mean sea level is the average level of the ocean surface halfway between the highest and lowest levels recorded. We use mean sea level as a datum or, curiously and incorrectly, a datum plane upon which we can reference or describe the heights of features on, above or below the ground. Imagine a true plane tangent to the surface of mean sea level at a given point. At horizontal distances of 1km from the point of tangency, the vertical distances(or elevations) of the plane above the surface represented by mean sea level are 7.8cm. Obviously, curvature of the earth’s surface is a factor that cannot be neglected in obtaining even rough values of elevations. The ordinary procedure in determining elevations, such as balancing backsight and foresight distance in differential leveling, automatically takes into account the curvature of the earth and compensates for earth curvature and refraction, and elevations referred to the curved surface of reference are secured without extra effort by the surveyor.There is close cooperation between geodetic surveying and plane surveying. The geodetic survey adopts the parameters determined by measurements of the earth, and its own results are available to those who measure the earth. The plane surveys, in turn, are generally tied to the control points of the geodetic surveys and serve particularly in the development of national map series and in the formation of real estate cadastres.Below we are about measure distance, Angle and Direction Measurement and Traversing. Distance MeasurementOne of the fundamentals of surveying is the need to measure distance. Distances are not necessarily linear, especially if they occur on the spherical earth. In this subject we will deal with distances in Euclidean space, which we can consider a straight line from one point or feature to another. Distance between two points can be horizontal, slope, or vertical. Horizontal and slope distances can be measured with lots of techniques of measurement depending on the desired quality of the result. If the points are at different elevations, then the distance is the horizontal length between plumb lines at the points. Here gives a brief summary of relevant techniques and their respective accuracies:Pacing and OdometerPacing is a very useful form of measurement though it is not precise, especially when surveyors are looking for survey marks in the field. Pacing can be performed at an accuracy level of 1/100~1/500 when performed on horizontal land, while the accuracy of pacing can’t be relied upon when pacing up or down steep hills. The odometer is a simple device that can be attached to any vehicle and directly registers the number of revolutions of a wheel. With the circumference of the wheel known, the relation between revolutions and distance is fixed.Ordinary Taping and Precise TapingTaping is a very common technique for measuring horizontal distance between two points. Ordinary taping refers to the very common tapes that we can buy them in stores, such as the plastic tapes or poly tapes. Such tapes have low precision in distance measurements with about 1/3000~1/5000. The precise taping refers to the steel tapes and which are much more expensive than the plastic tape and have higher precision of 1/10000~1/30000. Invar tapes are composed 35% nickel and 65% steel. This alloy has a very low coefficient of thermal expansion, making the tapes useful in precise distance measurement. Many tapes are now graduated with foot units on one side and metric units on the reverse side. Metric units are in meters, centimeter and minimeter with the total length of 20 m, 30 m, 50 m and 100 m.If we want to measure the horizontal distance between the two points A and B, we can do like this: With zero of the tape to the higher point B and tape going along the point A, we can measure the horizontal distance by using the plumb bob with pump line entering to the point A. To judge the exact horizontal line, we should move the tape up and down along the pump line and we will find the changes of reading in the tape. The shortest reading of the tape is the horizontal distance.If the distance is longer than the length of tape, then we can divide the long distance into several segments and get the total distance by plus each segment together. Since different tapes have different starts of zero of the tapes, it is very important to judge where the zero of the tape begins. Tacheometry and StadiaTacheometry is an optical solution to the measurement of distance. The word is derived from the Greek Tacns, meaning “swift”, and metrot, meaning “a measure”. Tacheometry involves the measurement of a related distance parameter either by means of a fixed-angle intercept. Theodolite tacheometry is an example of stadia system.The theodolite is directed at the level staff where the staff is held vertically and the line of sight of the telescope is horizontal.By reading the top and bottom stadia hairs on the telescope view and then the horizontal distance from center of instrument to rod can be obtained by multiplying the stadia interval factor K by the stadia interval and plus the distance C which is from the center of instrument to principal focus, i.e. D=Ks + C. Usually the nominal stadia interval factor K equals 100 which is a constant for a particular instrument as long as conditions remain unchanged, but it may be determined by observation in practice. The value of C is determined by the manufacturer and stated on the inside of the instrument box. For external-focusing telescopes, under ordinary condition, C may be considered as 1 ft without error of consequence. Internal-focusing telescopes are so constructed that C is 0 or nearly so; this is an advantage of internal-focus telescopes for stadia work. Most instruments now used for stadia are equipped with internal-focusing telescopes.Applications of tacheometry include traversing and leveling for the topographic surveys, location of detail surveys, leveling and field completion surveys for the topographic mapping, and hydrographic mapping. The relative precision is 1:1000 to 1:5000.Stadia is a form of tacheometry that uses a telescopic cross-hair configuration to assist in determining distances.A series of rod readings is taken with a theodolite and the resultant intervals are used to determine distances.Electronic Distance Measurement(EDM)The Electronic Distance Measurement(EDM) was first introduced in 1950s by the founders of Geodimeter Inc. The advent of EDM instrument has completely revolutionized all surveyingprocedures, resulting in a change of emphasis and techniques. Distance can now be measured easily, quickly and with great accuracy, regardless of terrain conditions.EDM instruments refer to the distance measurement equipments using light and radio waves. Both light waves and radio waves are electromagnetic. They have identical velocities in a vacuum (or space) to 299,792.458±0.001km/sec.These velocities, which are affected by the air’s density, are reduced and need to be recalculated in the atmosphere. The basic principle of EDM instruments is that distance equals time multiplied by velocity.Thus if the velocity of a radio or light wave and time required for it to go from one point to another are known, the distance between the two points can be calculated.The EDM instruments may be classified according to the type and wavelength of the electromagnetic energy generated or according to their operational range. EDM instruments use three different wavelength bands: (1)Microwave systems with range up to 150km, wave length 3 cm, not limited to line of sight and unaffected by visibility; (2)Light wave systems with range up to 5 km (for small machines), visible light, lasers and distance reduced by visibility; (3)Infrared systems with range up to 3 km, limited to line of sight and limited by rain, fog, other airborne particles. Although there is a wide variety of EDM instruments available with different wavelengths, there are basically only two methods of measurement employed which may divide the instruments into two classification as electro-optical (light waves) and microwaves (radio waves) instruments. These two basic methods are namely the pulse method and more popular phase different method. They function by sending light waves or microwaves along the path to be measured and measuring the time differences between transmitted and received signals, or in measuring the phase differences between transmitted and received signals in returning the reflecting light wave to source. Modern EDM instruments are fully automatic to such an extent that, after the instruments, set up on one station, emits a modulated light beam to a passive reflector set up on the other end of the line to be measured. The operator need only depress a button, and the slope distance is automatically displayed. More complete EDM instruments also have the capability of measuring horizontal and vertical or zenith angles as well as the slope distance. These instruments referred to as total station instruments.Angle and Direction MeasurementHorizontal and vertical angles are fundamental measurements in surveying. It is necessary to be familiar with the meanings of certain basic terms before describing angle and direction measurement. The terms discussed here have reference to the actual figure of the earth.Basic TermsA vertical line at any point on the earth’s surface is the line that follows the direction of gravity at that point.It is the direction that a string will assume if a weight is attached at that point and the string is suspended freely at the point.At a given point there is only one vertical line.A horizontal line at a point is any line that is perpendicular to the vertical line at the point.At any point there are an unlimited number of horizontal lines.A horizontal plane at a point is the plane that is perpendicular to the vertical line at the point. There is only one horizontal plane through a given point.A vertical plane at a point is any plane that contains the vertical line at the point.There are an unlimited number of vertical planes at a given point.Horizontal Angle and Vertical AngleA horizontal angle is the angle formed in a horizontal plane by two intersecting vertical planes, or a horizontal angle between two lines is the angle between the projections of the lines onto a horizontal plane. For example, observations to different elevation pointsB andC from A will give the horizontal angle ∠bac which is the angle between the projections of two lines (AB and AC) onto the horizontal plane. It follows that, although the points observed are at different elevations, it is always the horizontal angle and not the space angle that is measured (Figure 1). The horizontal angle is used primarily to obtain relative direction to a survey control point, or topographic detail points, or to points to be set out.A vertical angle is an angle measured in a vertical plane which is referenced to a horizontal line by plus (up) or minus (down) angles, or to a vertical line from the zenith direction. Plus and minus vertical angles are sometimes referred to as elevation or depression angles, respectively. A vertical angle thus lies between 0°and ±90°. Zenith is the term describing points on a celestial sphere that is a sphere of infinitely large radius with its center at the center of the earth. The zenith is anangle measured in a vertical plane downward from an upward directed vertical line through the instrument. It is thus between 0°and 180°. Obviously the zenith angle is equal to 90°minus the vertical angles. Vertical angles or zeniths are used in the correction of slope distance to the horizontal or in height determined. For the most part, the instrument used in the measurement of angles is called a transit or theodolite, although angles can be measured with clinometers, sextants (hydrographic surveys), or compasses.The theodolite contains a horizontal and vertical circles of either glass or silver.The horizontal and vertical circles of theodolite can be linked to circular protractors graduated from 0°to 360°in a clockwise manner set in horizontal and vertical plane. The horizontal circle is used when measuring or laying off horizontal angles and the vertical circle is used to measure or lay off vertical angles or zenith angles. Usually the units of angular measurement employed in practice are degrees, minutes, and seconds, the sexagesimal system.Angle MeasurementA horizontal angle in surveying has a direction or sense; that is, it is measured or designed to the right or to the left, or it is considered clockwise or counterclockwise. In the above figure, the angle at A fromB toC is clockwise and the angle from C to B is counterclockwise. With the theodolite set up, centered, and leveled over at station A, then a simple horizontal angle measurement between surveying point B, A and C would be taken as follows:⑴Commencing on, say, “face left”, the target set at survey point B is carefully bisected and the reading on horizontal scale is 25°. ⑵The upper plate clamp is released and telescope is turned clockwise to survey point C. The reading on horizontal circle is 75°⑶The horizontal angle is then the difference of the two directions, i.e. (75°-25°) =50°（⑷Change face and observe point C on “face right”, and note the reading=255°⑸Release upper plate and swing counterclockwise to point B and note the reading =205°⑹The reading or the direction must be subtracted in the same order as 255°-205°=50°⑺The mean of two values would be accepted if they are in acceptable agreement. Modern electronic digital theodolites contain circular encoders that sense the rotations of the spindles and the telescope, convert these rotations into horizontal and vertical (or zenith) angles electronically, and display the value of the angles on liquid crystal displays (LCDs) or light-emitting diode displays (LEDs). These readouts can be recorded in a conventional field book or can be stored in a data collector for future printout orcomputation. The instrument contains a pendulum compensator or some other provision for indexing the vertical circle readings to an absolute vertical direction.The circle can be set to zero readings by a simple press of a button or initialized to any value on the instrument.Azimuth is the horizontal angle measured in a clockwise direction from the plane of the meridian, which is a line on the mean surface of the earth joining the north and south poles. Azimuth ranges in magnitude from 0°to 360°, values in excess of 360°, which are sometimes encountered in computations, are simply reduced by 360°before final listing.Bearing is the traditional way of stating the orientation of the line. It is actually the angle measured from the north or south.The bearing, which can be measured clockwise or counterclockwise from the north or south end of the meridian, is always accompanied by letters that locate the quadrant in which the line falls. For example, bearing N32W indicates a line trending 32°west of the north. It is equal to an azimuth of 328°.Bearing S12W indicates a line trending 12°west of the south. It is equal to an azimuth of 192°. It is important to state that the bearing and azimuth are respect to true north..TraversingThe purpose of the surveying is to locate the positions of points on or near the surface of the earth. To determine horizontal positions of arbitrary points on the earth’s surface and elevation of points above or below a reference surface are known as a control survey.The positions and elevations of the points make up a control network.There are different types of control networks depending on where and why they are established.A control network may have very accurate positions but no elevations (called a Horizontal Control Network) or very accurate elevations but no positions (called a Vertical Control Network).Some points in a control network have both accurate positions and elevations.Control networks range from small, simple and inexpensive to large and complex and very expensive to establish.A control network may cover a small area by using a “local” coordinate system that allows you to position the features in relation to the control network but doesn’t tell you where the features areon the surface of the earth, or cover a large area by consisting of a few well-placed and precise-established control points, which is sometimes called the primary control.The horizontal positions of points in a network can be obtained in a number of different ways.（The generally used methods are triangulation, trilateration, traversing, intersection, resection and GPS.The main topic of this text refers to the traversing.TriangulationThe method of surveying called triangulation is based on the trigonometric proposition that if one side and three angles of a triangle are known, the remaining sides can be computed by the law of sines.Furthermore, if the direction of one side is known, the direction of the remaining sides can be determined.And then coordinates of unknown points can be computed by application of trigonometry.TrilaterationSince the advent of long-range EDM instrument, a method of surveying called trilateration was adopted to combine with triangulation.The trilateration is based on the trigonometric proposition that if the three sides of a triangle are known, the three angles can be computed by the law of cosines.Trilateration possesses some advantages over triangulation because the measurement of the distances with EDM instrument is so quick, precise and economical while the measurement of the angles needed for triangulation may be more difficult and expensive. For some precise projects, the combination of triangulation and trilateration which is called triangulateration is applied.TraversingA survey traverse is a sequence of lengths and directions of lines between points on the earth, obtained by or from field angle and distance measurements and used in determining positions of the point. The angles are measured using transits, theodolites, or total stations, whereas the distances can be measured using steel tapes or EDM instruments. A survey traverse may determine the relative positions of the points that if connects in series, and if tied to control stations based on some coordinate system, the positions may be referred to that system. From these computed relative positions, additional data can be measured for layout of new features, such as buildings and roads. Since the advent of EDM equipment, traversing has emerged as the most popular method to establish control networks such as basic area control, mapping, control of hydrographic surveys and construction projects.In engineering surveying, it is ideal way to surveys and dimensional control of route-type projects such as highway, railroad, and pipeline construction. In general, a traverse is always classified as either an open traverse or a closed traverse. An open traverse originates either at a point of known horizontal position with respect to a horizontal datum or at an assumed horizontal position, and terminates at a station whose relative position is not previously known..The open traverse provides no check against mistakes and large errors for its termination at anunknown horizontal position and lack of geometric closure. This lack of geometric closure means that there is no geometric verification possible with respect to the actual positioning of the traverse stations. Thus, the measuring technique must be refined to provide for field verification. At a minimum, distances are measured twice and angles are doubled. Open traverses are often used for preliminary survey for a road or railroad.A closed traverse can be described in any one of the following two ways: ⑴A closed loop traverse, as the name implies, forms a continuous loop, enclosing an area.This type of closed traverse starts at assumed horizontal position or at a known horizontal position with respect to a horizontal datum and ends at the same point. ⑵A connecting traverse starts and ends at separate points, whose relative positions have been determined by a survey of equal or higher order accuracy. A known horizontal position is defined by its geographic latitude and longitude, or by its X and Y coordinates on a grid system.Closed traverses, whether they return to the starting point or not, provide checks on the measured angles and distances.In both cases, the angles can be closed geometrically, and the position closure can be determined mathematically. Therefore they are more desirable and used extensively in control, construction, property, and topographic surveys.As we mentioned above, a closed traverse provides checks on the measured angles and distances. For example, the geometric sum of the interior angles in an n-side closed figure should be (n-2)×180°, but due to systematic and random errors of the measurements, when all the interior angles of a closed traverse are summed, they may or may not total the number of degrees required for geometric closure. The difference between the geometric sum and actual field sum of the interior angles is called angular closure. The total error of angular closure should be distributed evenly to each angle (if all angles were measured with the same precision) before mathematical analysis of the traverse. The important point before doing this is that the overall angular closure can’t be beyond the survey specifications.Closed traverses provide also checks on the measured distances, and the position closure can be determined mathematically, which means that an indication of the consistency of measuring distances as well as angles should be given to a traverse that closes on itself. Theoretically this position closure from the origin back to itself should be zero. But the Errors in the measured distances and angles of the traverses, however, will tend to alter the shape of the traverse, therefore we should compute the algebraic sum of the latitudes and algebraic sum of the departures, and compare them with the fixed latitude and departure of a straight line from the origin to the closing point. By definition, latitude here is the north/south rectangular component of a line and departure is the east/west rectangular component of a line. To differentiate direction, north is considered plus, whereas south is considered minus.Similarly, east is considered plus, whereas west is considered minus.Then the discrepancy should be adjusted by apportioning the closure both in latitudes and in departures on a reasonable basis. The adjusted position of each traverse point is determined with respect to some origin.This position is defined by its Y coordinates and its X coordinates with respect to a plane rectangular coordinate system in which the Y axis is assumed north-south whereas the X axis east-west.。
测绘工程专业英语翻译
Uuit1Geomatics Defined（测绘学定义）Where does the word Geomatics come from?（Geomatics－测绘或地球空间信息学，这个名词是怎么来的呢？） GEODESY+GEOINFORMATICS=GEOMATICS or GEO- for earth and –MATICS for mathematical or GEO- for Geoscience and -MATICS for informatics. （大地测量学＋地理信息学＝GEOMATICS 测绘学或者 geo 代表地球，matics 代表数学，或者 geo 代表地球科学，matics 代表信息学） It has been said that geomatics is many things to many people.（据说测绘学这个词对不同的人有不同的理解） The term geomatics emerged first in Canada and as an academic discipline; it has been introduced worldwide in a number of institutes of higher education during the past few years, mostly by renaming what was previously called “geodesy”or “surveying”, and by adding a number of computer scienceand/or GIS-oriented courses.（这个术语作为一个学科第一次形成于加拿大；在过去的几年里被全世界的许多高等教育研究机构所熟知，通常是以前的“大地测量学”或“测量学”在引入了许多计算机科学和 GIS 方向的课程后重新命名的。
测绘英语第二章原文加翻译
Unit 2 Geodetic Surveying and Plane Surveying（大地测量与平面测量）Surveying has been traditionally defined as the art and science of determining the position of natural and artificial features on, above or below the earth’s surface; and representing this information in analog form as a contoured map, paper plan or chart, or as figures in report tables, or in digital form as a three dimensional mathematical model stored in the computer. （测量传统定义为确定地表、地下和地上的自然与人工地貌特征【features形态、特征】；并使之按比例【in analog form】测绘成地形图【contoured map】、平面图【paper plan】或图表，或形成报告图表，或以数字形式形成三维立体数学模型存储进计算机。
）As such, the surveyor/geodesist dealt with the physical and mathematical aspect of measurement. （同样的，测量员/大地测量学家处理的就是测量出的物理的和数学的特征）The accurate determination and monumentation【标石、标志】 of points on the surface of the Earth is therefore seen as the major task. （因此精确确定并标定地表点位便成为测量的主要任务）Though these surveys are for various purposes, still the basic operations are the same---they involve measurements and computations or, basically, fieldwork and office work. （虽然测量工作有不同目的，基本的操作却都一样――他们包括测量和计算，或更基本地称之为，外业工作和内业工作）There are many different types of surveys such as land surveys, route surveys, city surveys, construction surveys, hydrographic surveys, etc., but generally speaking, surveying is divided into two major categories: geodetic and plane surveying. （测量分为许多不同的类型，如土地测量，路线测量，城市测量，建筑测量，水道测量等等，但是总的来说，测量分为两个主要的种类：大地测量和平面测量）Surveys will either take into account the true shape of the Earth（Geodetic surveys）or treat the earth as a flat surface(Plane surveys). （是考虑地球真实形状的大地测量还是将地球当成一个平面的平面测量【紧跟着上句】）Additionally, surveys are conducted【表现】 for the purpose of positioning features on the ground(Horizontal surveys), determining the elevation or heights of features(Vertical surveys) or a combination of both.（另外，测量还分为确定平面位置的水平测量和确定海拔的高程测量或两者的综合。
测绘专业英语翻译
一、Interpretations1.a level surface 水平面2.a horizontal plane 一个水平面3.surveying 测量学4.spirit leveling 直接水平5.DS3 Levels DS3水准仪6.J6 theodolite J6经纬仪7.traversing 导线测量8.control surveying 控制测量9.topographic surveying 地形测量10.topographic map 地形图11.photogrammetry 摄影测量12.remote sensing 遥感13.map地图14.the global positioning system 全球定位系统15.the geographic information system地理信息系统二、Translation1.A vertical line in the direction toward the center of the earth is to be said in thedirection of the nadir. A vertical line in the direction away from the center of the earthand above observer’s head is said to directed toward the zenith.翻译：一条铅垂线的方向朝向地心被称为朝向天底方向。
一条铅垂线的方向远离地心并超过观测者头部被称为朝向天顶方向。
2.The more general case occurs when the two points to be compared are in suchsituations as they are far apart or there are some obstacles to them. So it is impossibleto set up the level only once to determine the result.翻译：大多数情况下当两点在远距离的情况下对比的时候他们之间就会存在一些障碍。
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Unit 2 Geodetic Surveying and Plane Surveying（大地测量与平面测量）Surveying has been traditionally defined as the art and science of determining the position ofnatural and artificial features on, above or below the earth’s surface; and representing thisinformation in analog form as a contoured map, paper plan or chart, or as figures in report tables, or in digital form as a three dimensional mathematical model stored in the computer. （测量传统定义为确定地表、地下和地上的自然与人工地貌特征；并使之按比例测绘成地形图、平面图或图表，或形成报告图表，或以数字形式形成三维立体数学模型存储进计算机。
）As such, the surveyor/geodesist dealt with the physical and mathematical aspect of measurement. （同样的，测量员/大地测量学家处理的就是测量出的物理的和数学的特征）The accurate determination and monumentation of points on the surface of the Earth is therefore seen as the major task. （因此精确确定并标定地表点位便成为测量的主要任务）Though these surveys are for various purposes, still the basic operations are the same---they involve measurements and computations or, basically, fieldwork and office work. （虽然测量工作有不同目的，基本的操作却都一样――他们包括测量和计算，或更基本地称之为，外业工作和内业工作）There are many different types of surveys such as land surveys, route surveys, city surveys, construction surveys, hydrographic surveys, etc., but generally speaking, surveying is divided into two major categories: geodetic and plane surveying. （测量分为许多不同的类型，如土地测量，路线测量，城市测量，建筑测量，水道测量等等，但是总的来说，测量分为两个主要的种类：大地测量和平面测量）Surveys will either take into account the true shape of the Earth （Geodetic surveys）or treat the earth as a flat surface(Plane surveys). （是考虑地球真实形状的大地测量还是将地球当成一个平面的平面测量）Additionally, surveys are conducted for the purpose of positioning features on the ground(Horizontal surveys), determining the elevation or heights of features(Vertical surveys) or a combination of both.（另外，测量还分为确定平面位置的水平测量和确定海拔的高程测量或两者的综合。
）Geodetic Surveying（大地测量）The type of surveying that takes into account the true shape of the earth is called geodetic surveying. （考虑地球真实形状的测量工作称为大地测量）This type of survey is suited for large areas and long lines and is used to find the precise location of basic points needed for establishing control for other surveys. （这种测量适用于大范围和长距离的测量工作，用来确立基本点的精确位置，用以建立其他测量工作所需的控制网。
）In geodetic surveys, the stations are normally long distances apart, and more precise instruments and surveying methods are required for this type of surveying than for plane surveying.（在大地测量中，站点经常是互相距离很远，那么这种测量就比平面测量需要更精确的仪器和测量方法。
）Widely spaced, permanent monuments serve asthe basis for computing lengths and distances between relative positions. （广泛间隔开的永久标石就作为计算点位之间距离的基础）These basic points with permanent monuments are called geodetic control survey points, whichsupport the production of consistent and compatible data for surveying and mapping projects.（这种永久标石点被称为大地控制点，为测量和绘图工作提供可靠和一致的数据）In the past,ground-based theodolites, tapes , and electronic devices were the primary geodetic field measurements used. （过去，大地经纬仪、卷尺和电子设备是大地测量的野外工作初时的工具。
）Today, the technological expansion of GPS has made it possible to perform extremely accurate geodetic surveys at a fraction of the cost.（现在，技术的发展GPS使大地测量工作花费非常小的代价就能获得极为精确的结果成为可能。
）A thorough knowledge of the principles of geodesy is an absolute prerequisite for the proper planning and execution of geodetic surveys.（大地测量工作计划的编制和实施，绝对需要对大地测量学知识有全面的掌握。
）In Geodetic Surveys, the shape of the earth is thought of as a spheroid, although in a technical sense, it is not really a spheroid. （在大地测量中，地球的形状被看成一个椭球体，虽然在技术角度来看，它不是真正的椭球。
）Therefore, distances measured on or near the surface of the earth are not along straight lines or planes, but on a curved surface.（因此，在地球表面上或附近测量距离并不是沿着直线或平面进行，而是在一个曲面上。
) Hence, in the computation of distances in geodetic surveys, allowances are made for the earth’s minor and major diameters from which a spheroid of referenceis developed. （因此，在大地测量距离的计算中，参考椭球的长轴与短轴所带来的误差就显示出来。
）The position of each geodetic station is related to this spheroid.（每个大地站点的位置都与这个椭球有关）The positions are expressed as latitudes(angles north or south of the Equator) and longitudes(angles east or west of a prime meridian) or as northings and eastings on a rectangular grid.（这个位置是用纬度（与赤道面所成的角）和经度（与初子午线所成的角）或用在直角坐标系中的北距和东距来表示。
）A geodetic survey establishes the fundamentals for the determination of the surface and gravity field of a country.（大地测量为建立国家范围内的重力场和确定地表架构提供基础）This is realized by coordinates and gravity values of a sufficiently large number of control points, arranged in geodetic and gravimetric networks.（这将由测定布设在大地网和重力网中数量十分巨大的控制点，所得到的坐标和重力值来实现）In this fundamental work, curvature and the gravity field of the earth must be considered.（在这项基础工作中，地球的曲率和重力场都应被考虑。