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fix(GEE_Scripts): 完善Sentinel-1和Sentinel-2数据融合下载脚本中的去云参数与可视化参数配置.

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谢泓 2026-01-05 21:32:21 +08:00
parent 13a930fec5
commit e750c067e9
1 changed files with 11 additions and 5 deletions
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16
GEE_Scripts/S1andS2_download.js
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@ -26,10 +26,10 @@ var region = ee.FeatureCollection(
demoPoints demoPoints
.filter(ee.Filter.eq("Name", region_name)) .filter(ee.Filter.eq("Name", region_name))
.geometry() .geometry()
.buffer(2500) .buffer(3000)
.bounds() .bounds()
); );
var start_year = 2025; var start_year = 2018;
var end_year = 2025; var end_year = 2025;
var start_date = start_year + "-" + "01-01"; var start_date = start_year + "-" + "01-01";
var end_date = start_year + "-" + "12-31"; var end_date = start_year + "-" + "12-31";
@ -38,7 +38,7 @@ var cloud_threshold = 100; // 最大云量阈值
var QA_BAND = "cs_cdf"; var QA_BAND = "cs_cdf";
// The threshold for masking; values between 0.50 and 0.65 generally work well. // The threshold for masking; values between 0.50 and 0.65 generally work well.
// Higher values will remove thin clouds, haze & cirrus shadows. // Higher values will remove thin clouds, haze & cirrus shadows.
var CLEAR_THRESHOLD = 0.65; var CLEAR_THRESHOLD = 0.8;
var L30Bands = ["B2", "B3", "B4", "B5", "B6", "B7"]; var L30Bands = ["B2", "B3", "B4", "B5", "B6", "B7"];
// Sentinel-2的B8A波段(20m)可能更适合代表近红外波段 // Sentinel-2的B8A波段(20m)可能更适合代表近红外波段
// var s2Bands = ["B2", "B3", "B4", "B8", "B11", "B12"]; // var s2Bands = ["B2", "B3", "B4", "B8", "B11", "B12"];
@ -177,12 +177,18 @@ var s1_vis = {
max: 5, max: 5,
}; };
var true_rgb_vis = { var s2_vis = {
bands: ["Red", "Green", "Blue"], bands: ["Red", "Green", "Blue"],
min: 0.0, min: 0.0,
max: 0.3, max: 0.3,
}; };
var true_rgb_vis = {
bands: ["Red", "Green", "Blue"],
min: 0.01,
max: 0.15,
};
var false_rgb_vis = { var false_rgb_vis = {
min: 0.0, min: 0.0,
max: 0.4, max: 0.4,
@ -206,7 +212,7 @@ Map.addLayer(
start_year + " Sentinel-2 False RGB", start_year + " Sentinel-2 False RGB",
false false
); );
Map.addLayer(s2_img_rgb, true_rgb_vis, start_year + " Sentinel-2 True RGB"); Map.addLayer(s2_img_rgb, s2_vis, start_year + " Sentinel-2 True RGB");
Map.addLayer(region.style(styling), {}, region_name); Map.addLayer(region.style(styling), {}, region_name);
// 导出合并后的影像 // 导出合并后的影像