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javascript - 请求负载大小超过限制：4194304 字节

问题描述

我收到此错误，因为我正在尝试导出以驱动分类图像，该图像相当大，因为它包括澳大利亚新南威尔士州的整个地区。手册说在这种情况下它将以许多较小的文件导出，但对我来说并非如此。请查看我的代码，并帮助我弄清楚如何最终将其导出为 1 个图像或更多图像。提前致谢。

//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', 'B3_mean', 'B2_mean'], min:500, max:2800}, "222");


var classnames = burned.merge(unburned);

var bands = ['B2_mean', 'B3_mean', 'B4_mean', 'B5_mean', 'B6_mean', 'B7_mean', 'B8_mean', 'B11_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
});

标签： javascriptmachine-learningrandom-forestgoogle-earth-engine

解决方案

这里的简单建议，您的比例当前设置为 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增加到 100 m。如果它仍然无法导出，请减小几何图形的大小或进一步增加比例。

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