请求有效负载大小超出限制：4194304字节

问题描述

我收到此错误，是因为我试图导出以驱动分类图像，该图像相当大，因为它包含了澳大利亚新南威尔士州的整个区域。手册说，在这种情况下，它将导出为许多较小的文件，但对我而言并非如此。请看一下我的代码，并帮助我弄清楚如何最终以1张或更多图片的形式导出它。 预先感谢。

//SPECIFY AND MODIFY THE AREA OF INTEREST 

var S2 = ee.ImageCollection('copERNICUS/S2_SR')
                  .filterBounds(geometry);

var S2 = S2.filterMetadata('CLOUD_COVERAGE_ASSESSMENT','less_than',5);

            
var S2 = S2.filterDate('2019-12-14','2020-01-16');

print(S2.size());

            
var S2_image = S2.first();

var S2_clipped_collection = S2.map(function (S2_image){
  return S2_image.clip(geometry);
});
print(S2_clipped_collection);


var S2_image = S2_image.select('B2');

var S2_clipped_collection = S2_clipped_collection
  .reduce(ee.Reducer.mean());

print(S2_clipped_collection);

var S2_clipped_collection = S2_clipped_collection.select( 'B2_mean','B3_mean','B4_mean','B5_mean','B6_mean','B7_mean','B8_mean','B11_mean','B12_mean');

Map.addLayer(S2_clipped_collection,{bands:['B4_mean','B2_mean'],min:500,max:2800},"222");


var classnames = burned.merge(unburned);

var bands = ['B2_mean','B12_mean'];

var training = S2_clipped_collection.select(bands).sampleRegions({
  collection: classnames,properties: ['landcover'],scale: 10
});

print(training);

var classifier = ee.Classifier.smileRandomForest(100).train({
  features: training,classproperty: 'landcover',inputProperties: bands
});

//Run the classification
var classified = S2_clipped_collection.select(bands).classify(classifier);

//display classification
Map.centerObject(classnames,11);
Map.addLayer(classified,{min: 0,max: 3,palette: ['red','blue','green','yellow']},'classification');


Export.image.toDrive({
  image: classified,description: 'description',region: geometry,scale: 10,crs: 'epsg:25832',maxPixels: 1e19
});

解决方法

这里的建议很简单，您的比例尺目前设置为10 m，这非常小。除非您绝对需要高分辨率，否则我建议至少将其提高到100 m。如果仍然无法导出，请减小几何尺寸或进一步增大比例。