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  2. State Plane Coordinate System - Wikipedia

    en.wikipedia.org/wiki/State_Plane_Coordinate_System

    Thus the state plane coordinate system is still useful. Originally, the state plane coordinate systems were based on the North American Datum of 1927 (NAD27). Later, the more accurate North American Datum of 1983 (NAD83) became the standard (a geodetic datum is the way a coordinate system is linked to the physical Earth). More recently there ...

  3. Lambert conformal conic projection - Wikipedia

    en.wikipedia.org/wiki/Lambert_conformal_conic...

    Each state has its own set of reference parameters given in the standard. [8] The U.S. National Geodetic Survey's "State Plane Coordinate System of 1983" uses the Lambert conformal conic projection to define the grid-coordinate systems used in several states, primarily those that are elongated west to east such as Tennessee.

  4. United States National Grid - Wikipedia

    en.wikipedia.org/wiki/United_States_National_Grid

    In the first half of the 20th century, State Plane Coordinate Systems (SPCS) brought the simplicity and convenience of Cartesian coordinates to state-level areas, providing high accuracy (low distortion) survey-grade coordinates for use primarily by state and local governments. (Both of these planar systems remain in use today for specialized ...

  5. File:Philippines location map.svg - Wikipedia

    en.wikipedia.org/wiki/File:Philippines_location...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  6. File:Philippines - Location Map (2013) - PHL - UNOCHA.svg

    en.wikipedia.org/wiki/File:Philippines...

    This map is part of a collection of 216 free country maps, created by the UN Office for the Coordination of Humanitarian Affairs (OCHA), to be used in print, web or broadcast products. The ReliefWeb Location Maps released here are maps that highlight a country, its capital, major populated places and the surrounding regions.

  7. National Spatial Reference System - Wikipedia

    en.wikipedia.org/wiki/National_Spatial_Reference...

    The NSRS consists of a National Shoreline, the NOAA CORS Network [2] (a system of Global Positioning System Continuously Operating Reference Stations), a network of permanently marked points, and a set of models that describe dynamic geophysical processes affecting spatial measurements. The system is based on the datums NAD 83 and NAVD 88. [3]

  8. Projected coordinate system - Wikipedia

    en.wikipedia.org/wiki/Projected_coordinate_system

    A projected coordinate system – also called a projected coordinate reference system, planar coordinate system, or grid reference system – is a type of spatial reference system that represents locations on Earth using Cartesian coordinates (x, y) on a planar surface created by a particular map projection. [1]

  9. American polyconic projection - Wikipedia

    en.wikipedia.org/wiki/American_polyconic_projection

    In the cartography of the United States, the American polyconic projection is a map projection used for maps of the United States and its regions beginning early in the 19th century. It belongs to the polyconic projection class , which consists of map projections whose parallels are non- concentric circular arcs except for the equator , which ...