Polygon and other layers in some cases have been collected from other sources. Feature coordinates use the UTM Zone 13 (NAD 83) projection. Point features have been generated from the most recent HydroBase database, and are available in a statewide download only. GIS data layers are available as zipped shapefiles, and in some cases, ESRI geodatabases (compatible with version 10.1 and above). Map Viewer is a free web-based tool available to users and does not require ArcGIS. The data can be downloaded and used directly in ArcGIS. GIS layers include HydroBase data such as points of diversion, wells, streams/rivers, stream gages, canals, and climate stations, irrigated acreage for various years, and other relevant layers. Geographic Information System (GIS) data sets are available for download for all river basins in Colorado.
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