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Three-parameter transformation to WGS84 is: ΔX = –86 meters ΔY = –98 meters ΔZ = –119 meters Prof. Savage also offers software, ReprojectME!, which will convert coordinates between JTM and other systems.
The new grid has two main advantages. One is that the Transverse Mercator projection is better for navigation than Cassini-Soldner. The other is that ICS was based on a 19th-century reference ellipsoid (approximation of the shape of the Earth) and this was replaced by a more accurate approximation.
United Nations map showing the 1949 Armistice Agreements, with original map reference points ("MR") on the Palestine grid referenced in the respective agreements.. The basic way of specifying a location on the Palestine grid is to write the east-west coordinate followed by the north-south coordinate using 3 digits each.
The NAD83 map datum is sufficiently close to WGS84 for initial use. It is best to double check on a mapping site such as WikiMapia. Cordinates obtained in China from commercial sources (Google, Bing, Baidu, etc.) may be obfuscated with GCJ-02 or BD-09. Vector sources are more frequently affected than satellite sources.
There are transformations that directly convert geodetic coordinates from one datum to another. There are more indirect transforms that convert from geodetic coordinates to ECEF coordinates, transform the ECEF coordinates from one datum to another, then transform ECEF coordinates of the new datum back to geodetic coordinates.
A transverse Mercator projection. The transverse Mercator map projection (TM, TMP) is an adaptation of the standard Mercator projection.The transverse version is widely used in national and international mapping systems around the world, including the Universal Transverse Mercator.
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The original WGS84 model had an absolute accuracy of 1–2 meters. WGS84 (G730) first incorporated GPS observations, taking the accuracy down to 10 cm/component rms. [14] All following revisions including WGS84 (G873) and WGS84 (G1150) also used GPS. [15] WGS 84 (G1762) is the sixth update to the WGS reference frame. [14]