From 39a290c3d652a6a108c2b63b215ea2b96d872825 Mon Sep 17 00:00:00 2001
From: gis-xh <xhong_17@outlook.com>
Date: Fri, 16 Jan 2026 12:15:57 +0800
Subject: [PATCH] =?UTF-8?q?fix(Weather=5Fdownload):=20=E4=BF=AE=E6=AD=A3?=
 =?UTF-8?q?=E6=B0=94=E8=B1=A1=E6=95=B0=E6=8D=AE=E4=B8=8B=E8=BD=BD=E8=84=9A?=
 =?UTF-8?q?=E6=9C=AC=E7=9A=84=E6=8A=95=E5=BD=B1=E5=92=8C=E5=88=86=E8=BE=A8?=
 =?UTF-8?q?=E7=8E=87=E8=AE=BE=E7=BD=AE.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 GEE_Scripts/Weather_download.js | 41 +++++++++++++++++----------------
 1 file changed, 21 insertions(+), 20 deletions(-)

diff --git a/GEE_Scripts/Weather_download.js b/GEE_Scripts/Weather_download.js
index 3ee83ff..185ca20 100644
--- a/GEE_Scripts/Weather_download.js
+++ b/GEE_Scripts/Weather_download.js
@@ -2,7 +2,7 @@
  * 气象数据下载 —— 以年平均气温与年总降雨量处理下载为例
  *
  * @author CVEO Team
- * @date 2026-01-15
+ * @date 2026-01-16
  *
  * 1. 加载 ERA5-Land 数据
  * 2. 合成年度平均气温数据, 年度总降雨量数据
@@ -19,15 +19,16 @@ var region_name_en = "Baokang";
 var region = Baokang;
 var target_crs = "EPSG:4525";
 var target_res = 30;
+var orign_res = 10000;
 var start_year = 2021;
 var end_year = 2025;
 var start_date = start_year + "-01-01";
 var end_date = end_year + "-12-31";
 var ERA5Bands = ["temperature_2m", "total_precipitation_sum"];
 var commonBands = ["temperature", "total_precipitation_sum"];
-
+// 设置研究区域的缓冲区, 确保粗分辨率数据能够完整覆盖研究区域
 var region_geo = region.geometry();
-var bounds = region_geo.bounds();
+var bounds = ee.Feature(region_geo.bounds()).buffer(orign_res * 3).geometry();
 var common_filter = ee.Filter.and(
   ee.Filter.bounds(bounds),
   ee.Filter.date(start_date, end_date)
@@ -84,13 +85,13 @@ print(year_str + " Annual Mean ERA5-Land Temperature Histogram", ui.Chart.image.
 var annual_mean_precipitation = ee.Image(yearlyRain.mean()).setDefaultProjection(proj);
 print(year_str + " Annual Mean ERA5-Land Precipitation Histogram", ui.Chart.image.histogram(annual_mean_precipitation, region, 10000, 258));
 
-var annual_mean_temp_1km = annual_mean_temperature.clip(bounds).resample("bicubic").reproject({
-  crs: "EPSG:4526",
-  scale: 30,
+var annual_mean_temp_30m = annual_mean_temperature.clip(bounds).resample("bicubic").reproject({
+  crs: "EPSG:4326",
+  scale: target_res,
 });
-var annual_mean_precipitation_1km = annual_mean_precipitation.clip(bounds).resample("bicubic").reproject({
-  crs: "EPSG:4526",
-  scale: 30,
+var annual_mean_precip_30m = annual_mean_precipitation.clip(bounds).resample("bicubic").reproject({
+  crs: "EPSG:4326",
+  scale: target_res,
 });
 
 var temperature_vis = {
@@ -119,11 +120,11 @@ var styling = {
   fillColor: "00000000",
 };
 
-Map.centerObject(region, 7);
-Map.addLayer(annual_mean_temperature, temperature_vis, year_str + " Annual Mean Temperature 0.1 degree");
-Map.addLayer(annual_mean_precipitation, precipitation_vis, year_str + " Annual Mean Precipitation 0.1 degree");
-Map.addLayer(annual_mean_temp_1km, temperature_vis, year_str + " Annual Mean Temperature " + target_res + "m");
-Map.addLayer(annual_mean_precipitation_1km, precipitation_vis, year_str + " Annual Mean Precipitation " + target_res + "m");
+Map.centerObject(region, 9);
+Map.addLayer(annual_mean_temperature, temperature_vis, year_str + " Annual Mean Temperature 0.1°");
+Map.addLayer(annual_mean_precipitation, precipitation_vis, year_str + " Annual Mean Precipitation 0.1°");
+Map.addLayer(annual_mean_temp_30m, temperature_vis, year_str + " Annual Mean Temperature " + target_res + "m");
+Map.addLayer(annual_mean_precip_30m, precipitation_vis, year_str + " Annual Mean Precipitation " + target_res + "m");
 Map.addLayer(region.style(styling), {}, region_name);
 
 // 导出合并后的影像
@@ -131,8 +132,8 @@ Map.addLayer(region.style(styling), {}, region_name);
 // 并对缺失值进行填充, 否则默认为nan不便于后续本地处理
 function exportCOG(image, description, folder, region, scale, crs) {
   image = image.toFloat().unmask(-9999.0);
-  // 默认为 EPSG:4526 投影
-  crs = crs || "EPSG:4526";
+  // 默认为 EPSG:4326 投影
+  crs = crs || "EPSG:4326";
   Export.image.toDrive({
     image: image,
     description: description,
@@ -150,18 +151,18 @@ function exportCOG(image, description, folder, region, scale, crs) {
   });
 }
 
-print("Start exporting " + year_str + " Yearly Mean ERA5-Land Temperature (" + target_crs + " " + target_res + "m)", annual_mean_temperature);
+print("Start exporting " + year_str + " Yearly Mean ERA5-Land Temperature (" + target_crs + " " + target_res + "m)", annual_mean_temp_30m);
 exportCOG(
-  annual_mean_temperature,
+  annual_mean_temp_30m,
   region_name_en + "_ERA5_Temperature_" + year_str + "_" + target_res + "m",
   "Temperature",
   region,
   target_res,
   target_crs
 );
-print("Start exporting " + year_str + " Yearly Mean ERA5-Land Precipitation (" + target_crs + " " + target_res + "m)", annual_mean_precipitation);
+print("Start exporting " + year_str + " Yearly Mean ERA5-Land Precipitation (" + target_crs + " " + target_res + "m)", annual_mean_precip_30m);
 exportCOG(
-  annual_mean_precipitation,
+  annual_mean_precip_30m,
   region_name_en + "_ERA5_Precipitation_" + year_str + "_" + target_res + "m",
   "Precipitation",
   region,