I am pretty new to GIS, so forgive me if this is a stupid question. I downloaded a bunch of land cover files from USGS seamless warehouse of Florida. Every time I try to 1) view the .adf file (which I am assuming is the raster data image) in arcCatalog or 2) add the .adf file in arcMap the program crashes. Any reason for this? I am running the trial version of ArcMap 10 on my home PC in order to avoid using the slow ones at my universities lab, so I figured maybe I am missing some kind of extension or something. I am not really sure, I do not have much experience working with raster data so far.
An ESRI grid is actually a group of files with the extension '.adf', all stored in a folder with the grid name (limited to 13 characters). The folder should contain files like:
When you see this folder in ArcMap or ArcCatalog it should look like a single raster file without an extension and normally you can't drill down into the grid file folder from within Arc. You must not mess with this folder or delete the 'info' subfolder that will also appear in your directory.
I don't know why Arc is crashing but I wouldn't expect to load a single '.adf' file as such in ArcGIS. So, I wonder if you have incomplete grids or perhaps have muddled your grid folders?