GDL has been highly tuned to perform geographic determination in a high-performance environment. To perform the spatial comparison operations, the library uses a proprietary format for the spatial object file. These files are called GeoStan Spatial Boundary (GSB) files and can be created with the Spatial+ library. These GSB files need to be created and available prior to the execution of GDL. Please refer to the Spatial+ Reference Manual for detailed instructions on how to create these files.
Spatial Attributes
You can also include your own data by using "attributes". These spatial attributes might include population counts, revenue figures, demographic characteristics, or other information specific to a region or specific location. You can view the attribute information after you choose your input file, specify the input and outfield fields, and process the data.