Earth:Jordan Transverse Mercator
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Jordan Transverse Mercator (JTM) (Arabic: نظام تربيع ميركاتور الأردني المستعرض) is a projected coordinate system defined by the Royal Jordan Geographic Center (RJGC). This system is based on 6° belts with a central meridian of 37° East and a scale factor at origin (mo) = 0.9998. The JTM is based on the Hayford ellipsoid adopted by the IUGG in 1924.
No transformation parameters are presently offered by the government.[1] However, Prof. Stephen H. Savage of Arizona State University provides the following parameters for the projection:
Jordan Transverse Mercator Geographic Coordinate System: GCS_International_1924 Datum: D:International_1924 Spheroid: International_1924 Axis: 6378388 Flattening: 297 Prime Meridian: Greenwich Prime Meridian Longitude: 0 Units: Degree Unit Scale Factor: 0.017453292519943295 Projection: Transverse Mercator False Easting: 500,000 False Northing: -3,000,000 Central Meridian: 37 Scale Factor: 0.9998 Central Parallel: 0 Units: Meter Scale Factor 1 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. (See http://daahl.ucsd.edu/gaialab/# for more information.)
The central meridian of 37° East is roughly midway between the extremes of Jordan: the Karameh Border Crossing with Iraq is close to 39° East, while the city of Aqaba on the Red Sea is close to 35° East.
See also
- Jordan
- Mercator projection
References
- ↑ Grids & Datums—Hashemite Kingdom of Jordan Article by Clifford J. Mugnier, C.P., C.M.S. "Archived copy". Archived from the original on 2006-12-14. https://web.archive.org/web/20061214085623/http://www.asprs.org/resources/grids/12-2006-jordan.pdf. Retrieved 2007-02-23.
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