| ??????????????Coons??????? |
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| 引用本文： | 陈传法.??????????????Coons???????[J].大地测量与地球动力学,2012,32(4):87-89. |
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| 作者姓名： | 陈传法 |
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| 作者单位： | 山东科技大学测绘科学与工程学院,青岛,266590 |
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| 基金项目： | 国家自然科学基金(41101433);海岛(礁)测绘技术国家测绘地理信息局重点实验室开放基金(2011B10);中国科学院海岸带环境过程重点实验室开放基金(201209);山东省“泰山学者”建设工程专项经费项目 |
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| 摘 要： | ????Coons?????????????DEM?????????????????????????????IDW??SPLINE??KRIGING???б??????????θ????????????Coons?????????????????θ??????????????????????????????????????У?IDW????????KRIGING??SPLINE?????Coons?????????????Coons????????Ч??????????????DEM??????
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| 关 键 词： | Coons???? ??? ????????? ??????? ???θ???? |
GRID-BASED DEM CONSTRUCTION BY MEANS OF COONS PATCH |
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| Chen Chuanfa.GRID-BASED DEM CONSTRUCTION BY MEANS OF COONS PATCH[J].Journal of Geodesy and Geodynamics,2012,32(4):87-89. |
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| Authors: | Chen Chuanfa |
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| Institution: | Chen Chuanfa(Geometics College Shandong University of Science and Technology,Qingdao 266590) |
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| Abstract: | A method of grid-based DEM construction in terms of Coons patch has been presented.Two examples including a numerical test and a real-world example were employed to comparatively analyze the simulation errors of Coons patch and the classical interpolation methods including IDW,SPLINE and KRIGING.Gaussian synthetic surfaces with various terrain complexity controlled by coefficient parameters were simulated and the results indicated that with the increase of terrain complexity,the simulation errors of all the methods will increase as well.The Coons patch is much more accurate than the classical methods.The real-world example was used to test the effect of sampling interval on the simulation accuracies of all the interpolators.The results indicate that sampling interval has a negative effect on the simulation accuracy.However,the Coons patch is more accurate than the classical interpolation methods regardless of sampling interval.In terms of simulation accuracy and computing speed,Coons patch can be considered as an alternative method for DEM construction. |
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| Keywords: | Coons patch interpolation DEM(Digital Elevation Model) sampling density terrain complexity |
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