空间数据的采集与编辑
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Introduction to ArcInfo™ using ArcMap™, ArcCatalog™, and ArcToolbox™
Coordinate space
All data exists in the same unitless coordinate space
12,000,000 4,000,000
Paper map
Scan
Raw coordinates
(on paper)
Raster
GIS
Manual entry
Image
Digitize
ASCII coordinate file
Generate
Convert
Shapefile Convert
Import/Export
ArcInfo coverage
Introduction to ArcInfo™ using ArcMap™, ArcCatalog™, and ArcToolbox™
Creating a new feature class in ArcCatalog
Create within a dataset or stand alone Define geometry type, spatial reference, and fields Add features in ArcMap
Stream
Introduction to ArcInfo™ using ArcMap™, ArcCatalog™, and ArcToolbox™
Converting existing digital data
ArcInfo supports the conversion of multiple formats
UTM (meters)
UTM (feet)
10,000 180
Decimal Degrees
Sometimes data must be transformed to the correct part of coordinate space
180
10,000
4,000,000
Copyright © 1999-2000 Environmental Systems Research Institute, Inc. All Rights Reserved.
Import/Export
Geodatabase
Convert Future releases
ArcInfo grid
Copyright © 1999-2000 Environmental Systems Research Institute, Inc. All Rights Reserved.
Introduction to ArcInfo™ using ArcMap™, ArcCatalog™, and ArcToolbox™
空间数据的采集与编辑
3.空间数据的采集与编辑
空间数据采集是指将现有的地图、外业观测成果、航 空像片、遥感图像、文本资料等转成计算机可以识别 处理的数字形式。
数据采集可分为属性数据采集和图形采集。
Copyright © 1999-2000 Environmental Systems Research Institute, Inc. All Rights Reserved.
Copyright © 1999-2000 Environmental Systems Research Institute, Inc. All Rights Reserved.
Introduction to ArcInfo™ using ArcMap™, ArcCatalog™, and ArcToolbox™
Copyright © 1999-2000 Environmental Systems Research Institute, Inc. All Rights Reserved.
Introduction to ArcInfo™ using ArcMap™, ArcCatalog™, and ArcToolbox™
Georeferencing your data
Locating your data in real-world coordinates
Copyright © 1999-2000 Environmental Systems Research Institute, Inc. All Rights Reserved.
Geodatabase
ห้องสมุดไป่ตู้
DXF
Copyright © 1999-2000 Environmental Systems Research Institute, Inc. All Rights Reserved.
Digitizing in ArcMap
Use the Create New Feature edit task Specify tolerances
Specify point or stream mode
Point
Copyright © 1999-2000 Environmental Systems Research Institute, Inc. All Rights Reserved.
Creating new data
Scanning data
Produces raster image Georeference after scanning
Heads-up digitizing
Digitize over image on screen Georeference before or after digitizing
Introduction to ArcInfo™ using ArcMap™, ArcCatalog™, and ArcToolbox™
3.1 Automating data
Many spatial data automation options
Other vector GIS
Convert
Digitize
Wizards and tools make conversion simple
Batch processing for large jobs
Most data conversions output a coverage
SDTS
Coverage
TIGER
IGDS
TXT
MIF Shapefile