What is .GRD file? - MapInfo
Vertical Mapper (MapInfo) Grid/Clutter Files
In my previous articles I have explained What is about Map File? - Map Server, How to create a .MAP file from MapInfo .TAB file dataset? - Quantum GIS and many more. In this article I will explain about MapInfo .GRD (Grid) file.
GRD files are especially useful for the wireless sector of the industry that may currently use MapInfo or RF network planning tools that output in the .Grd/.Grc format. Grd file always be in a raster data format.
For more documentation download the developer guide of Pitney Bowes http://reference.mapinfo.com/software/mapxtreme_windows/english/7_1_0/MapXtreme_DeveloperGuide.pdf