Links to general, historical and topographic maps and other raster maps as well as interactive atlases. The following links will provide instructions on how to connect to that Agency’s Web Mapping Service while using Esri’s ArcGIS software or for Google Earth. Come to the Map Room and travel the world. The collection has cartographic and reference materials in a variety of formats that cover the entire Earth. TIP: These maps are in a GeoPDF format and will not display in ArcGIS software. Convert these images to a GeoTIFF using Acrobat PRO or Photoshop. TIP: These maps are in a GeoPDF format and will not display in ArcGIS software. Convert these images to a GeoTIFF using Acrobat PRO or Photoshop. This is the U.S. government’s official website providing easy access to data related to Recovery Act spending and allows for the reporting of potential fraud, waste, and abuse. USGS main geospatial data clearinghouse portal. This site is being phased out. All data is being moved to the above link, ‘Data.gov’ A one stop source for environmental and natural resources data. Allows you to choose your area of interest, browse and select data from the catalog, customize the format, and then download your data set. Source.