RASTEREXTENTSCOERCER.

光栅范围：多边形覆盖光栅的整个范围。如果光栅旋转，则栅格的旋转拐角用于多边形。

Data MBR Extents and Data Extents: These modes examine the data in the raster to more accurately determine the extents. A cell is considered to be nodata when, for each selected band, the value for that cell is equal to that band's nodata value. If any cell value is not equal to that band's nodata value, the cell will be considered data. In these modes, this transformer will only operate on selected raster bands, and each selected band is required to have a nodata value.

In Data MBR Extents mode, the polygon will be an axis-aligned bounding rectangle that covers all data cells in the raster. This is more computationally expensive than finding the Raster Extents.

In Data Extents mode, the output geometry will be either a single polygon or an aggregate of polygons that exactly cover only the data cells in the raster. This is more computationally expensive than finding the Data MBR Extents.