—David Raleigh, Jim Tenbrink, Melita Kennedy
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The ArcGIS geometry system defines the shape of geodatabase features and provides ways to create and edit them and relate them to each other. And the spatial reference system provides a location for them. Projections and datum transformations correctly place features from different data sources together onto the same map. Understanding these systems allows you to correctly and efficiently use many of the other ArcObjects APIs. These systems are also relevant to Web application developers, such as those who use geometry service. Get introduced to the set of geometry and spatial reference objects and learn how the properties of spatial reference objects control the precision of coordinates stored in geodatabases. Several common situations where you will use geometries and spatial references in cooperation with other APIs, such as the geodatabase, editor, and geometry service APIs, will be shown.