New form of geodetic coordinate system taking two length quantity as coordinate parameters |
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Authors: | Yimin Shi Ziyang Zhu and Yeming Fan |
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Affiliation: | (1) Department of Surveying and Geoinformatics, Tongji University, Shanghai, 200092, China;(2) Key Laboratory of Modern Engineering Surveying, State Bureau of Surveying and Mapping, Shanghai, 200092, China;(3) Resource Department of Guangdong Province, Guangzhou, 510500, China |
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Abstract: | A new form of geodetic coordinate system based on geodesic coordinates instead of geodetic longitude and latitude was proposed.
The vertical and horizontal geodesic coordinates measured with length were defined as coordinate parameters, but the two families
of coordinate curves were still meridians and parallel circles. The first fundamental form on the ellipsoidal surface and
its three coefficients were deduced by the geodesic coordinate. The formula for the latitudinal scale factor of length for
geodetic parallel lines was derived, by which the obtained result conformed to that standard value calculated from geodetic
latitude, and it is applicable in the range of 400 km from north to south. Therefore, it lays the foundation for establishing
the differential equation and differential relationship based on this type of coordinate parameters; and consequently, it
is convenient and accurate enough to operate on the ellipsoidal surface in this new form of geodetic coordinate system.
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Translated from Journal of University (Natural Science), 2005, 33(11): 1537–1540 译自: 同济大学学报(自然科学版)] |
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Keywords: | geodetic coordinate system meridian and parallel circle coordinate parameter the first fundamental form on the ellipsoidal surface latitudinal scale factor of length |
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