Google Earth Engine——NASA DEM是对STRM数据的再处理，通过纳入ASTER GDEM、ICESat GLAS和PRISM数据集的辅助数据，提高了精度

NASADEM is a reprocessing of STRM data, with improved accuracy by incorporating auxiliary data from ASTER GDEM, ICESat GLAS, and PRISM datasets.

The most significant processing improvements involve void reduction through improved phase unwrapping and using ICESat GLAS data for control.

Documentation:

• User's Guide

NASA DEM是对STRM数据的再处理，通过纳入ASTER GDEM、ICESat GLAS和PRISM数据集的辅助数据，提高了精度。

最重要的处理改进涉及通过改进相位解包和使用ICESat GLAS数据进行控制来减少空隙。

Dataset Availability

2000-02-11T00:00:00 - 2000-02-22T00:00:00

Dataset Provider

NASA / USGS / JPL-Caltech

Collection Snippet

ee.Image("NASA/NASADEM_HGT/001")

Bands Table

* = Values are estimated

数据引用：

NASA JPL (2020). NASADEM Merged DEM Global 1 arc second V001 [Data set]. NASA EOSDIS Land Processes DAAC. Accessed 2020-12-30 from LP DAAC - NASADEM_HGT

代码：

var dataset = ee.Image('NASA/NASADEM_HGT/001');
var elevation = dataset.select('elevation');
//加一个白色背景图
var background = ee.Image(1);
Map.addLayer(background, {min: 0, max: 1});
//选择最大最小的范围（高程）
var elevationVis = {
  min: 0,
  max: 2000,
};
// 设置高程的显示大小参数
Map.addLayer(elevation.updateMask(elevation.gt(0)), elevationVis, 'Elevation');
Map.setCenter(17.93, 7.71, 2);