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How is the real world represented in GIS?
The document explains how the real world is represented in Geographic Information Systems (GIS) through various map objects, such as points, lines, and areas, and details their coordinate geometry. It discusses sources of data used in GIS, including satellite imagery and direct data capture methods, as well as the importance of linking existing data to GIS for effective analysis. The document also highlights the challenges in obtaining digital geographic data and the layering of GIS for enhanced display and analysis.
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Introduction to the representation of the real world in GIS and data linking.
Discussion of various types of map objects in GIS: Points, Lines, Areas, and Raster data.
Explanation of network features and surfaces in GIS, including their dimensional attributes.
Attributes in GIS provide descriptive information, enhancing data analysis capabilities.
Methods of linking existing data to GIS, including use of spreadsheets and databases.
Overview of primary and secondary data sources for GIS and challenges in obtaining digital geographic data.
Details on constructing map layers in a GIS, including their management and display options.
Additional resources and websites for information on GIS tools and functionalities.