GEE训练指南：Sentinel-1数据的投影、可视化及导出流程

函数

projection()

Returns the default projection of an Image. Throws an error if the bands of the image don’t all have the same projection.

返回图像的默认投影。如果图像带的投影不一致，则会抛出错误。

Arguments:

this:image (Image):

The image from which to get the projection.

Returns: Projection

nominalScale()

Returns the linear scale in meters of the units of this projection, as measured at the point of true scale.

返回在真实比例点测量的该投影单位的线性比例（以米为单位）。

Arguments:

this:proj (Projection)

Returns: Float

代码

// 加载一个研究区格式为单个矢量
var geoJSON = {
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "coordinates": [
          [
            [
              12.411401665803425,
              

作者：此星光明