GEE训练：sentinel-1数据的投影、显示和导出

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,