Google Earth Engine（GEE）——union()多个矢量数据feature合并为一个矢量feature案例分析

函数：

union(right, maxError, proj)

Returns a feature containing the union of the geometries of two features.

Arguments:

this:left (Element):

The feature containing the geometry used as the left operand of the operation. The properties of the result will be copied from this object.

right (Element):

The feature containing the geometry used as the right operand of the operation. The properties of this object are ignored.

maxError (ErrorMargin, default: null):

The maximum amount of error tolerated when performing any necessary reprojection.

proj (Projection, default: null):

The projection in which to perform the operation. If not specified, the operation will be performed in a spherical coordinate system, and linear distances will be in meters on the sphere.

Returns: Feature

返回一个包含两个特征的几何图形的联合体的特征。

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原文链接：blog.csdn.net/qq_31988139/article/details/123153094