12/31/2023 0 Comments Clip raster file to polygonRight-click Identity Function > Insert Function > Clip Function.With the correct raster selected in the top portion of the Image Analysis window, click the Add Function button in the Processing section.In ArcMap, click the Windows menu, and open the Image Analysis window.This tool requires the vertices to be entered manually, and is therefore not suitable for erasing more complex geometries.įor more information on the Extract by Polygon tool, refer to ArcMap: Extract by Polygon Use the Image Analysis window to apply the Clip function to the raster However, this tool does not allow the use of an existing polygon feature class for the input polygon. All cells inside the polygon receive NoData values on the output raster. The Extract by Polygon tool has an extraction area parameter with an outside option which allows cells outside the input polygon to be selected and written to the output raster. The Extract by Polygon tool requires a Spatial Analyst license. Then I do 'gdalwarp -wo "INIT_DEST=255,0,255" square.tif square_cut.tif -cutline small_square_with_hole.csv' and I get a nice extract of my white square with a hole and a background of pink.The instructions provided describe how to clip or extract a raster outside polygon boundaries. co compress=lzw, -of jp2kak, -t_srs +utm=11, -outsize 50% 50%, etc.Ĭlip by WKT can be achieved by using the cutline option of gdalwarp and a small CSV file containing the WKT (trunk feature). ![]() Standard gdalwarp and gdal_translate options are respected, e.g. Ignore all boundary/mask logic and clip raster to projwin extent of any ogr/gdal supported data source. Gdal -clip input.jp2 -extent-only in.tif out.tif Gdal -clip polys.shp -extent-only in.tif out.tif ![]() Gdal -clip lines.shp -extent-only in.tif out.tif Nodata in clipping image is nodata in output image.Ĭlip By File gdal -clip points.shp -extent-only in.tif out.tif If no mask is specified, clipping boundary is set to extents of clipping image. Gdal -clip mask.tif -mask 255,0,0 -reverse in.tif out.tif Output extent is shrunk/expanded to range of data areas. is the outside of the clipping polygons). Same as clip by poly, but treat RGB value of 255,0,0 as the nodata area (e.g. Polgons can be discontiguous (voids and islands are respected).Ĭlip by Raster gdal -clip mask.tif -mask 255,0,0 in.tif out.tif If clipping shapefile consists of multiple polygons, clipping boundary becomes outer boundary of all polys (merge polygons before clip). If -name is omitted, sequentially number output (in.tif -> outdir/in_00.tif). Use field in poly.shp to name output rasters. For each polygon in poly.shp create a raster clipped to extent of that polygon. Gdal -clip poly.shp -multi -name in.tif outdirĬreate tiles. ![]() Output extent is the larger of raster or shapefile. In output raster interior of polygon is nodata. Gdal -clip poly.shp -reverse in.tif out.tif Output extent is set to shapefile projwin extents. Outside the polygon is nodata, inside is input.tif values. I envision it working something like this:Ĭlip By Polygon gdal -clip poly.shp infile.tif outfile.tif Ĭookie cutter an image. A feature I wish for almost every week is the ability to clip an image by an irregular polygon.
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