The GIS layers of the URF and MRF maps contain four types of geographic information: 1) general geographic information (county border,
roads, parks, parcels, structures, etc); 2) hydrologic information (precipitation, streams, lakes/ponds, ditches, irrigated areas); 3) hydrogeologic information (alluvial aquifer, hydrogeologic units, wells);
and 4) topographic information (topo maps, DEM, 10ft elevation contours). Type 1 information is used to locate the site of interest and obtain some general geographic data. Type 2 and Type 3 information is
integral to the evaluation of ground water resources. Type 4 information provides elevation and background data as needed. All layers have been georeferenced with respect to Pitkin County's projection and
datum: State Plane, Colorado Central Zone, NAD83 (ft).