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The National Historical Geographic Information System (NHGIS) is a historical GIS project to create and freely disseminate a database incorporating all available aggregate census information for the United States between 1790 and 2010. The project has created one of the largest collections in the world of statistical census information, much of ...
A historical geographic information system (also written as historical GIS or HGIS) is a geographic information system that may display, store and analyze data of past geographies and track changes in time. It can be regarded as a tool for historical geography.
The logo of the United States Geological Survey (USGS) The Geographic Names Information System (GNIS) is a database of name and location information about more than two million physical and cultural features throughout the United States and its territories; the associated states of the Marshall Islands, Federated States of Micronesia, and Palau; and Antarctica.
Third city in the US to reach 1 million. Chicago overtakes Philadelphia as the nation's second most populous city shortly after they both pass the 1 million mark. 3 Philadelphia: Pennsylvania: 1,046,964: Second city in the US to reach 1 million. 4 Brooklyn: New York: 806,343: This is the last census where the City of Brooklyn is counted as an ...
The National Map is a significant contribution to the U.S. National Spatial Data Infrastructure (NSDI) from the Federal Geographic Data Committee (FGDC) and currently is being transformed to better serve the geospatial community by providing high quality, integrated geospatial data and improved products and services including new generation ...
Nationaal Geografisch Instituut (NGI) Institut géographique national (IGN) ngi.be ign.be: Topomap Viewer: Belize: Lands and Surveys Department: mnra.gov.bz: Bénin: Institut Géographique National du Bénin (IGN) ign.bj: Geoportal 2 (planned) Geoportal 1 (hidden) [permanent dead link ] Bolivia: Instituto Geográfico Militar: igmbolivia.gob.bo
In modern mapping, a topographic map or topographic sheet is a type of map characterized by large-scale detail and quantitative representation of relief features, usually using contour lines (connecting points of equal elevation), but historically using a variety of methods.
OpenStreetMap (abbreviated OSM) is a free, open map database updated and maintained by a community of volunteers via open collaboration. [4] Contributors collect data from surveys, trace from aerial photo imagery or satellite imagery, and import from other freely licensed geodata sources.