Jackie, as a preview of a layer for this featuresource you would see nothing else then what you would see if you load a single raster file.
The benefit of this document is that MapGuide can quickly determine which rasterfile(s) to open for the requested map extent. If you do not have such a document then MapGuide have to check the location of each file in this feature source at runtime. Some of my raster feature sources have more than 2500 files. In short: a Raster Image Catalog offers much faster access to your raster files. Gunter -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/GDAL-Raster-Image-Catalogs-What-are-they-tp6268693p6268986.html Sent from the MapGuide Users mailing list archive at Nabble.com. _______________________________________________ mapguide-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapguide-users
