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  2. Texas land survey system - Wikipedia

    en.wikipedia.org/wiki/Texas_land_survey_system

    State boundary; Railroad district (12 total, county boundaries) County; In Texas, the highest level of land subdivision is the boundary of the state itself. Below this are the Texas railroad districts, of which there are 12. These are Spanish grants, surveyed on the "metes and bounds" system of measurement, and are of irregular shape and size.

  3. National Historical Geographic Information System - Wikipedia

    en.wikipedia.org/wiki/National_Historical...

    The cartographic boundary files and the tabular data are formatted so as to be easily linked for use in Geographic Information System software. NHGIS was launched in 2007 and is maintained by the Minnesota Population Center at the University of Minnesota and is funded by the National Science Foundation and the National Institutes of Health .

  4. Module:Location map/data/USA Texas - Wikipedia

    en.wikipedia.org/.../data/USA_Texas

    Relief map of Texas.png Module:Location map/data/USA Texas is a location map definition used to overlay markers and labels on an equirectangular projection map of Texas . The markers are placed by latitude and longitude coordinates on the default map or a similar map image.

  5. State Plane Coordinate System - Wikipedia

    en.wikipedia.org/wiki/State_Plane_Coordinate_System

    However, the need to transform spatial data from one coordinate system to another can be burdensome. Sometimes a regional area of interest—such as a metropolitan area covering several counties—crosses a state plane zone boundary. The Seattle metropolitan area in Washington is an example of this.

  6. Web GIS - Wikipedia

    en.wikipedia.org/wiki/Web_GIS

    The United States Census Department extensively uses Web GIS to distribute its boundary data, such as TIGER files, and demographics to the public. [ 1 ] [ 16 ] The "2020 Census Demographic Data Map Viewer" runs on an ESRI Web Map Application, and provides demographic information, such as population, race, and housing information at the state ...

  7. Hydrologic unit system (United States) - Wikipedia

    en.wikipedia.org/wiki/Hydrologic_unit_system...

    The newer delineation work on watersheds and subwatersheds was done using 1:24,000 scale maps and data. As a result, the subbasin boundaries were changed and adjusted in order to conform to the higher resolution watersheds within them. Changes to subbasin boundaries resulted in changes in area sizes.