Google Earth Engine 将 Raster 转换为 Vector（reduceToVectors）

var geometry = ee.Geometry.Rectangle([29.1796875, 32.02670629333615, 32.607421875, 29.993002284551075]);
var landcover = ee.Image('MCD12Q1/MCD12Q1_005_2001_01_01').select('Land_Cover_Type_1');

// Run reduceToVectors per class by masking all other classes.
var classes = ee.List([0, 1, 2, 3, 4, 5, 6, 7, 8])
  .map(function(n) {
    
    
    var classImage = landcover.eq(ee.Number(n));
    var vectors = classImage.updateMask(classImage)
      .reduceToVectors({
    
    
        reducer: ee.Reducer.countEvery(), 
        geometry: geometry, 
        scale: 30,
        maxPixels: 1e8})
      .geometry();
    return ee.Feature(vectors, {
    
    "class": n});
  });
var result = ee.FeatureCollection(classes);
Map.addLayer(result);

最好是每一个polygon都有一个feature

var geometry = ee.Geometry.Rectangle([29.1796875, 32.02670629333615, 32.607421875, 29.993002284551075]);
var landcover = ee.Image('MCD12Q1/MCD12Q1_005_2001_01_01').select('Land_Cover_Type_1');

var classes = landcover.reduceToVectors({
    
    
  reducer: ee.Reducer.countEvery(), 
  geometry: geometry, 
  scale: 30,
  maxPixels: 1e8
});
var result = ee.FeatureCollection(classes);
Map.addLayer(result);

原文链接
原文链接