dem格式编码高程数据来创建高清晰地形。
Elevation data is a good example of a single-band raster dataset, often visualized with a color ramp, as shown in Figure 2.高程数据就是很好的单级光栅数据的例子,它经常用颜色坡度,如图2所示。
First, the positioning data and the elevation data should be synchronized, and then, the accuracy should be high enough.首先要保证定位数据与测深数据是同步的,其次要保证时间的精确度足够高。