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【卫星遥感知识分享】什么是DEM、DOM、DTM、DSM
DEM是用一组有序数值阵列形式表示地面高程的模型,表达方式跟遥感卫星图像数据类似,用一个个的小方格和方格的数值(高程)来表达地形。这个小方格的边长就是DEM的分辨率。分辨率数值越小,其表达的地形细节就越多。 DEM数据通常表现为栅格数据,30米精度 ...
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