State Plane Coordinate System (original) (raw)
The State Plane Coordinate System (SPCS) is a set of 124 geographic zones or coordinate systems designed for specific regions of the United States. Each state contains one or more state plane zones, the boundaries of which usually follow county lines. There are 110 zones in the contiguous US, with 10 more in Alaska, 5 in Hawaii, and one for Puerto Rico and US Virgin Islands. The system is widely used for geographic data by state and local governments. Its popularity is due to at least two factors. First, it uses a simple Cartesian coordinate system to specify locations rather than a more complex spherical coordinate system (the geographic coordinate system of latitude and longitude). By using the Cartesian coordinate system's simple XY coordinates, "plane surveying" methods can be used, sp
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| dbo:abstract | The State Plane Coordinate System (SPCS) is a set of 124 geographic zones or coordinate systems designed for specific regions of the United States. Each state contains one or more state plane zones, the boundaries of which usually follow county lines. There are 110 zones in the contiguous US, with 10 more in Alaska, 5 in Hawaii, and one for Puerto Rico and US Virgin Islands. The system is widely used for geographic data by state and local governments. Its popularity is due to at least two factors. First, it uses a simple Cartesian coordinate system to specify locations rather than a more complex spherical coordinate system (the geographic coordinate system of latitude and longitude). By using the Cartesian coordinate system's simple XY coordinates, "plane surveying" methods can be used, speeding up and simplifying calculations. Second, the system is highly accurate within each zone (error less than 1:10,000). Outside a specific state plane zone accuracy rapidly declines, thus the system is not useful for regional or national mapping. Most state plane zones are based on either a transverse Mercator projection or a Lambert conformal conic projection. The choice between the two map projections is based on the shape of the state and its zones. States that are long in the east–west direction are typically divided into zones that are also long east–west. These zones use the Lambert conformal conic projection, because it is good at maintaining accuracy along an east–west axis, due to the projection cone intersecting the earth's surface along two lines of latitude. Zones that are long in the north–south direction use the transverse Mercator projection because it is better at maintaining accuracy along a north–south axis, due to the circumference of the projection cylinder being oriented along a meridian of longitude. The panhandle of Alaska, whose maximum dimension is on a diagonal, uses an Oblique Mercator projection, which minimizes the combined error in the X and Y directions. (en) |
| dbo:wikiPageExternalLink | http://www.ngs.noaa.gov/ http://www.vterrain.org/Projections/spcs.html http://www.earthpoint.us/StatePlane.aspx http://www.ngs.noaa.gov/PUBS_LIB/ManualNOSNGS5.pdf |
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| dct:subject | dbc:Cartography_of_the_United_States dbc:Surveying_of_the_United_States dbc:Geographic_coordinate_systems |
| gold:hypernym | dbr:Set |
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| rdfs:comment | The State Plane Coordinate System (SPCS) is a set of 124 geographic zones or coordinate systems designed for specific regions of the United States. Each state contains one or more state plane zones, the boundaries of which usually follow county lines. There are 110 zones in the contiguous US, with 10 more in Alaska, 5 in Hawaii, and one for Puerto Rico and US Virgin Islands. The system is widely used for geographic data by state and local governments. Its popularity is due to at least two factors. First, it uses a simple Cartesian coordinate system to specify locations rather than a more complex spherical coordinate system (the geographic coordinate system of latitude and longitude). By using the Cartesian coordinate system's simple XY coordinates, "plane surveying" methods can be used, sp (en) |
| rdfs:label | State Plane Coordinate System (en) |
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| prov:wasDerivedFrom | wikipedia-en:State_Plane_Coordinate_System?oldid=1023078863&ns=0 |
| foaf:isPrimaryTopicOf | wikipedia-en:State_Plane_Coordinate_System |
| is dbo:wikiPageDisambiguates of | dbr:SPCS |
| is dbo:wikiPageRedirects of | dbr:State_plane_coordinate_system dbr:State_plane |
| is dbo:wikiPageWikiLink of | dbr:American_polyconic_projection dbr:Projected_coordinate_system dbr:United_States_Geological_Survey dbr:Comparison_of_the_imperial_and_US_customary_measurement_systems dbr:United_States_National_Grid dbr:Lambert_conformal_conic_projection dbr:Foot_(unit) dbr:State_plane_coordinate_system dbr:Transverse_Mercator:_Bowring_series dbr:Inch dbr:Mile dbr:SPCS dbr:Spatial_reference_system dbr:United_States_customary_units dbr:State_plane |
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