前言：根据矢量图加载海拔、坡度、坡向和山体阴影。

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方法一：加载elevation、slope、aspect和hillshade数据

var geometry = ee.FeatureCollection('users/www1573979951/lh');
Map.centerObject(geometry,6);
var dataset = ee.Image("USGS/SRTMGL1_003")
var terrain = ee.Algorithms.Terrain(dataset);

//海拔
var elevation = terrain.select('elevation');
//坡度
var slope = terrain.select('slope');
//坡向
var aspect = terrain.select('aspect');
//山体阴影
var hillshade = terrain.select('hillshade');

Export.image.toDrive({
  image: elevation,   
  description: "elevation",
  fileNamePrefix: "elevation",
  scale: 30, 
  crs: "EPSG:4326",
  folder: 'dem',
  maxPixels: 1e13,
  region: geometry});
  

Export.image.toDrive({
  image: slope,   
  description: "slope",
  fileNamePrefix: "slope",
  scale: 30, 
  crs: "EPSG:4326",
  folder: 'dem',
  maxPixels: 1e13,
  region: geometry});
  

Export.image.toDrive({
  image: aspect,   
  description: "aspect",
  fileNamePrefix: "aspect",
  scale: 30, 
  crs: "EPSG:4326",
  folder: 'dem',
  maxPixels: 1e13,
  region: geometry});
  

Export.image.toDrive({
  image: hillshade,   
  description: "hillshade",
  fileNamePrefix: "hillshade",
  scale: 30, 
  crs: "EPSG:4326",
  folder: 'dem',
  maxPixels: 1e13,
  region: geometry});
  

方法二：加载elevation、slope、aspect数据

var geometry = ee.FeatureCollection('users/www1573979951/hkh_boundary');
Map.centerObject(geometry,6);
var SRTM30 = ee.Image("NASA/NASADEM_HGT/001")

var elevation = SRTM30.select('elevation').clip(geometry)
var slope = ee.Terrain.slope(elevation).clip(geometry)
var aspect = ee.Terrain.aspect(SRTM30).clip(geometry)

Export.image.toDrive({
  image: elevation,   
  description: "elevation",
  fileNamePrefix: "elevation",
  scale: 30, 
  crs: "EPSG:4326",
  folder: 'dem',
  maxPixels: 1e13,
  region: geometry });

Export.image.toDrive({
  image: slope,   
  description: "slope",
  fileNamePrefix: "slope",
  scale: 30, 
  crs: "EPSG:4326",
  folder: 'dem',
  maxPixels: 1e13,
  region: geometry });

Export.image.toDrive({
  image: aspect,   
  description: "aspect",
  fileNamePrefix: "aspect",
  scale: 30, 
  crs: "EPSG:4326",
  folder: 'dem',
  maxPixels: 1e13,
  region: geometry });