网格DEM剖面方法获取岷江上游层状地貌参数
Acquisition Parameters of Stratified Reliefs by Grid DEM Profiles Method on the Upper Minjiang
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摘要: 针对连续层状地貌序列空间数据较难获取的现状,提出通过网格化统计高精度DEM剖面,进而提取层状地貌序列空间数据的原理和方法,并以川西岷江上游为例进行验证。在研究区,等间隔提取垂直于河流流向的DEM剖面,以10m×50m的单位网格统计DEM剖面中层状地貌序列的分布,并进行野外层状地貌调查和DGPS剖面验证,最终确定层状地貌序列的垂向分布形态。实验验证了此方法的可行性。Abstract: With the development of neotectonics, quantitative research on stratified reliefsis required whene valuating vertical uplift movement. In order to solve these problems, a system of stratified relief data acquisition method is proposed and tested on the upper Minjiang River, China. In the research zone, the vertical spatial data of stratified relief was acquired by using a unit grid to analyze the distribution of reliefs in the DEM profiles, which are perpendicular to the river. A field survey and DGPS profile verified the availability of this method.