About SDF Files

There are two types of SDF (Spatial Database Format) files:

• SDF 2—Compatible with Autodesk MapGuide 6.5 and earlier.
• SDF 3—Compatible with all versions of Autodesk MapGuide Enterprise, MapGuide Open Source, Autodesk Infrastructure Map Server 2015, and AutoCAD Map 3D 2007 and later.

SDF 2 files contain a single type of data (text, point, polyline, or polygon), and have only three attributes: Key, URL, and Name. Therefore, they are typically associated with external database files to provide table data for theming. SDF 3 files can store both geometry and any table data associated with it.