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| 引用本文： | 曾安敏,张菊清.��������ƹ�������С�ⷨ�ĵ�ͼ����任[J].大地测量与地球动力学,2008,28(1):81-84. |
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| 作者姓名： | 曾安敏 张菊清 |
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| 作者单位： | 1. 西安测绘信息技术总站,西安,710054;长安大学地质工程与测绘工程学院,西安,710054
2. 长安大学地质工程与测绘工程学院,西安,710054 |
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| 基金项目： | 国家自然科学基金(40774001和40474001)，地球空间与大地测量教育部重点实验室开放基金(1469990324233-04-11) |
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| 摘 要： | ????????????????С????????????????????????????????????????????????????ú???????????????в????????????Э???????????????????????????????????????÷???????????任?е????,???????????????????С?????????????????????????С?????????
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| 关 键 词： | ?????? Э?????? ??????С ???????? ????任 |
| 文章编号： | 1671-5942（2008）01-0081-04 |
| 收稿时间： | 2007-08-05 |
| 修稿时间： | 2007年8月5日 |
COORDINATE TRANSFORMATION OF DIGITAL MAP BASED ON COLLOCATION BY TWO MINIMIZATION STEPS |
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| Zeng Anmin,Zhang Juqing.COORDINATE TRANSFORMATION OF DIGITAL MAP BASED ON COLLOCATION BY TWO MINIMIZATION STEPS[J].Journal of Geodesy and Geodynamics,2008,28(1):81-84. |
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| Authors: | Zeng Anmin Zhang Juqing |
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| Institution: | 1)Xi’ an Information Division of Surveying &; Mapping,Xi’ an 710054 2)School of Geological &; Surveying Engineering, Chang’an University, Xi’an, 710054 |
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| Abstract: | After having reviewed the basic collocation theory, the principle of the collocation by two minimization steps is introduced. Considering that the stochastic signal contains not only the stochastic information but also some systematic trend, after the systematic trend parameter having been calculated and then the residual was used to compute the covariance function of the stochastic information. With the refitted covariance function, the stochastic signal was evaluated and the systematic trend parameters were estimated again.An actual digital map case shows that the solution accuracy with this method for collocation is better than that with the affine transformation by least squares. |
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| Keywords: | collocation covariance function two minimization steps digital maps coordinate transformation |
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