This catalog contains Geographic Information System (GIS) data in georeferenced vector (point) and raster formats. The vector (point) data are available as Environmental Systems Research Institute (ESRI) shapefiles and as comma-separated text (*.csv) files. Shapefiles generally include *.shp, *.shx, *.xml, and *.dbf files at a minimum. All these data files also include the *.prj files, which contain the dataset projection information. The corresponding 4-km resolution raster data are available in Imagine *.img format.
The GIS files have been bundled by year. Each year of raster data (GRID-type) has an associated compressed WinRAR zip file. The corresponding shp and csv data types have compressed WinRAR RAR files, due to the large size capacity of RAR archives. Hence, every compressed file may contain up to 12 months of data. The metadata text files are bundled with their corresponding zip files.
