gee批量上传tif

### 使用Google Earth Engine (GEE) 进行批量上传GeoTIFF文件

为了实现批量上传GeoTIFF文件至Google Earth Engine (GEE)，通常的做法不是直接通过GEE平台完成，而是借助Python API或者其他编程接口间接处理。具体来说，可以先将GeoTIFF文件上传到Google Cloud Storage (GCS)，再利用`ee.data.startIngestion()`函数配合资产管理和元数据设置，在GEE中创建对应的影像集合。

下面是一个简单的例子展示如何使用Python脚本批量上传多个GeoTIFF文件：

#### 准备工作
确保已经安装并配置好`earthengine-api`库，并且设置了有效的云项目[^4]。

pip install earthengine-api google-cloud-storage

#### 编写Python脚本来执行批量上传任务

import ee
from google.cloud import storage

def upload_geotiff_to_gcs(bucket_name, source_file_names, destination_blob_names):
    """Upload multiple local GeoTIFF files to a specified GCS bucket."""
    client = storage.Client()
    bucket = client.bucket(bucket_name)

    for src, dest in zip(source_file_names, destination_blob_names):
        blob = bucket.blob(dest)
        blob.upload_from_filename(src)
        print(f"File {src} uploaded to {dest}.")
        
def create_asset(asset_id, gcs_url, properties=None):
    """Create or update an asset from the given GCS URL with optional metadata"""
    task_config = {
        'id': asset_id,
        'properties': properties if properties else {},
        'sources': [{
            'uris': [gcs_url],
        }]
    }
    
    task = ee.data.newTaskId()[0]
    ee.data.startIngestion(task, task_config)
    print(f'Started ingestion of "{asset_id}" from {gcs_url}')

if __name__ == "__main__":
    # Initialize EE and set project ID.
    ee.Initialize()

    BUCKET_NAME = "your-gcs-bucket-name"
    ASSET_PARENT_FOLDER = "projects/your-project-id/assets/path/to/folder"

    geo_tiffs_local_paths = ["path/to/local/file1.tif", "path/to/local/file2.tif"]
    gcs_destinations = ["file1.tif", "file2.tif"]

    # Step 1: Upload all GeoTIFFs to GCS first.
    upload_geotiff_to_gcs(BUCKET_NAME, geo_tiffs_local_paths, gcs_destinations)

    base_gcs_uri = f'gs://{BUCKET_NAME}/'
    for i, file_name in enumerate(gcs_destinations):
        full_gcs_path = base_gcs_uri + file_name
        
        new_asset_id = f"{ASSET_PARENT_FOLDER}/{i}"
        props = {"description": "Batch Uploaded Image"}

        # Step 2: Create assets within GEE based on each GCS path.
        create_asset(new_asset_id, full_gcs_path, props)

此代码片段展示了怎样把本地存储的一系列GeoTIFF文件上载到指定的GCS桶内，随后调用`create_asset`方法基于这些位于云端的对象构建新的GEE图像资源。注意这里的路径替换为实际使用的值。