GIS英文介绍

• Geographic Information
Attribute Information Display Information Cartographic Appeal
• THANK
YOU
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Data acquisition
File chart
Original data
Data editing Projection transformatio
Structured data
Spatial query Spatial Analysis
Data Output
Interactive display
Storage and retrieval
space database
Drawing, form
Fundamentals of Geographic Information System (GIS)
• Mapping Concepts
• A map represents geographic features or other spatial phenomena by graphically conveying information about locations and attributes
functions of the GIS
Access to information and input
Data storage and management GIS Data query and analysis
Results expression and output
The realization of the Fundamentals of GIS
• Thus the basic objective of mapping is to provide ：
• • • descriptions of geographic phenomenon spatial and non spatial information map features like Point, Line, & Polygon.
Map Features
Map Characteristics
• • •
Point feature Line feature Area feature
Map Scale Map Accuracy Map Extent Data Base Extent
Map Resolution：
• Map resolution refers to how accurately the location and shape of map features can be depicted for a given map scale.
GIS
• Geographical Information System
• The Fundamentals of GIS
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Who is GIS ?
From the following several aspects to understand GIS: (1) GIS physical shell is computerized technology system; (2) the GIS operation object is spatial data; (3) the advantage of GIS technique lies in its mix of data structure and effective data integration, the unique geographical spatial analysis ability; (4) the GIS is emerging interdisciplinary subject.
Map Accuracy： · factors besides resolution, influence how accurately features can be Many
depicted
Maps and Map Analysent • Data Automation