The AutoCAD Map 3D Geospatial Platform API is used for managing geospatial data in a map. It shares many classes and methods with Autodesk Infrastructure Map Server 2013 and MapGuide Open Source, so applications written for one product can work in another with minimal modification.
The Geospatial Platform API is not the same as the AutoCAD Map 3D ObjectARX .NET API. For details about this API see the ObjectARX .NET Developer’s Guide and the ObjectARX .NET API Reference.