摘要
在生产或生活中应用数字高程模型内插时,最关键的问题就是怎样选取恰当的内插方法来满足高程数据建模的需求。不同的DEM内插方法随地貌地区和采样点方式的不同存在不同的误差。本文使用V isual Basic语言将数字高程模型内插方法编写成一套能够快捷方便的获取内插点高程的内插软件系统,可以使应用人员直接捕捉地面点高程,并获得地形的可视化信息,由此可以直观地观察到在同一地区相同采样点方式的条件下采用不同的内插方法引起的内插精度等质量方面的优劣区别,从而获取最优的内插方法,有效地满足DEM的生产、质量控制、精度评定和分析应用等各个环节。
During the use of interpolation ot digital elevation model （DEM） , the most important problem is how to select me proper memoos oi me interpolation to meet the need of the digital elevation modeling. There are errors because of the different methods of the interpolation as soon as the different terrains and different ways of getting terrain＇ s data. In this paper, combining the computer language visual basic and the methods of the digital elevation model, the author compiled software, which is a shortcut to get the DEM data of the interpolation point and the visible information of the terrain. In case of the same terrain and the same data, it is known that one is the best among the used interpolation methods intuitionistic. In this way, the interpolation methods of digital elevation model can be used to satisfy every field of the production of the DEM, control of the quality, assessment of the accuracy and the analysis application and so on.
出处
《测绘科学》
CSCD
北大核心
2009年第4期136-138,共3页
Science of Surveying and Mapping
基金
国家"863"重点项目(编号:2006AA12Z111)
国家"973"重点项目(编号:2006CB708405)
国家科技支撑计划重点项目(编号:2007BAH15B02)
关键词
数字高程模型(DEM)
内插方法
精度评定
ctigital elevation model （DEM）
interpolation methods
accuracy assessment
