What are the formats of the download files?
Vector data use ESRI formats of ARC Export files and shape files. Raster files, such as images and DEMs, are GeoTiffs, .bils, or ARC/INFO Grids. Many of the .tif files have been compressed using MrSid, making their file extensions .sid. Non-spatial socio-economic data is provided in the form of ASCII text files and Excel files. All the files have been zipped with WinZip for downloading.