| 基于 CGCS2000的达州市独立坐标系建立 |
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| 引用本文： | 黄堰.基于 CGCS2000的达州市独立坐标系建立[J].全球定位系统,2014(3):90-92. |
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| 作者姓名： | 黄堰 |
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| 作者单位： | 四川省煤田地质局一三七队,四川达州635006 |
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| 摘 要： | 建立达州市中心城区CGCS2000坐标系时，投影变形值已经大于2.5 cm/km ，需要根据城市中心离中央子午线的距离和城市平均高程面，确定了建立达州市相对独立坐标系的方案，通过边长的高程归化和高斯投影改化，最终解算出地方椭球基于2000国家大地坐标系的椭球参数。
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| 关 键 词： | 城市独立坐标系 CGCS2000 抵偿高程面 高程归化 高斯投影改化 |
The Establishment of Dazhou Relatively Independent Coordinate System Based on CGCS 2000 |
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| HUANG Yan.The Establishment of Dazhou Relatively Independent Coordinate System Based on CGCS 2000[J].Gnss World of China,2014(3):90-92. |
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| Authors: | HUANG Yan |
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| Institution: | HUANG Yan (Sichuan Coalfield Geology Bureau137 Geological Team, Dazhou Sichuan 635006, China) |
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| Abstract: | In the process of establishing Dazhou center city relatively independent coordi-nate system based on CGCS2000 ,considering the length distortion is more than 2.5 cm/km , therefore ,according to the distance from urban centre to median meridian and urban average level datum ,the paper discussed the scheme to the establishment of Dazhou center city rela-tively independent coordinate system .Finally ,the paper calculated the ellipsoidal parameters of local ellipsoid based on 2000 national geodetic coordinate system ,through the side eleva-tion reduction and Gauss projection correction . |
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| Keywords: | City independent coordinate system CGCS2000 projection datum planewith compensation effect elevation reduction Gauss projection correction |
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