Editing Encyclopedia:Geographic references (section)

==United States==
; GR1
: The [[United States Census Bureau]]'s [[United States Census 2000|2000 Census]] gazetteer.  This was the primary source for the latitude and longitude values for about 23,500 U.S. cities.  The data are indexed by state, county, and place [[Federal_Information_Processing_Standard|FIPS]] codes.<ref>[http://www.census.gov/geo/www/gazetteer/gazette.html U.S. Gazetteer Files: 2000 and 1990<!-- Bot generated title -->]</ref>
; GR2
: The [[United States Census Bureau]]'s [[United States Census 2000|2000 Census]] data.  Much of the geographic and demographic information for the U.S. states, counties, and cities came from the data on the site.  The data is not totally accurate due to various polling errors, but it is a very good estimate.  See the Bureau's website  for more information.  The data were used for the following topics: geographic areas (total, land, and water), population and housing unit densities, demographic spreads across race, age, sex, and income.  The data are indexed by state, county, and place FIPS codes.  See also [[Race (United States Census)]] for a list of the definition of race according to the U.S. Census Bureau.<ref>[http://factfinder.census.gov American FactFinder<!-- Bot generated title -->]</ref>
; GR3
: The [[Geographic Names Information System]] developed by the [[United States Geological Survey]].  The data contain information on a wide range of geographic features such as populated places, rivers, mountains, etc.  The data provided include geographic coordinates, elevation, population (if applicable), and the FIPS codes for the state and county containing the feature (but not the feature itself).<ref>[http://geonames.usgs.gov/ U.S. Board on Geographic Names (BGN)<!-- Bot generated title -->]</ref>  Note that elevations might be interpolated, locations of non-point features may be either approximate centres or mouths, and locations of cities may be arbitrary choices of a feature within the city.  Buildings, post offices, and several other feature classes were added during phase 2, but were removed in 2017 when they were considered in retrospect too burdensome to maintain.  Some data views may have been based upon topical subsets, such as the National Map Names, or the "Concise" and "Historic" lists.  See also [[Wikipedia:Reliability of GNIS data]].
; GR4
: The [[Federal_Information_Processing_Standard|FIPS55]] database, which contains standardized codes for populated places in the [[United States]].  The system describes the codes and the relationships between different entities, such as the part of relationship between a [[U.S. state]] and a [[county]].  It also contains [[ZIP code]] information.<ref>[https://geonames.usgs.gov/domestic/download_data.htm#State%20Files%20with%20Federal%20Codes%20--%20File%20Format BGN: Domestic and Antarctic Names - State and Topical Gazetteer Download Files::State Files with Federal Codes]</ref>
; GR5
: The [[National Geospatial-Intelligence Agency]]'s database of foreign geographic feature names.  Excludes information on the United States and [[Antarctica]].  Includes geographical coordinates in the WGS-84 format.  Site also includes information on the [[Federal_Information_Processing_Standard|FIPS10]] standard.<ref>[https://www.nga.mil/ProductsServices/Pages/Geographic-Names.aspx U.S. Board on Geographic Names]</ref>
; GR6
: A list of the U.S. [[county seat]]s: [http://www.naco.org/Template.cfm?Section=Find_a_County&Template=/cffiles/counties/usamap.cfm National Association of Counties] (Most, but not all counties)
; Montana Natural Resource Information System
: Contains information on a wide range of geographic topics related to the [[U.S. state]] of [[Montana]].<ref>[http://nris.state.mt.us/mapper/ Montana On-Line Interactive Map Builder<!-- Bot generated title -->]</ref>