JezK
Edit File: tile_extent_from_raster.py
#!/usr/bin/env python3 # -*- coding: utf-8 -*- # ****************************************************************************** # $Id$ # # Project: GDAL # Purpose: Generate the extent of each raster tile in a overview as a vector layer # Author: Even Rouault, <even dot rouault at spatialys dot com> # # ****************************************************************************** # Copyright (c) 2019, Even Rouault, <even dot rouault at spatialys dot com> # # Permission is hereby granted, free of charge, to any person obtaining a # copy of this software and associated documentation files (the "Software"), # to deal in the Software without restriction, including without limitation # the rights to use, copy, modify, merge, publish, distribute, sublicense, # and/or sell copies of the Software, and to permit persons to whom the # Software is furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER # DEALINGS IN THE SOFTWARE. # ****************************************************************************** import sys from osgeo import gdal, ogr from osgeo_utils.auxiliary.util import GetOutputDriverFor def Usage(): print("Usage: tile_extent_from_raster.py [-f format] [-ovr level] in.tif out.shp") return 2 def main(argv=sys.argv): i = 1 output_format = None in_filename = None out_filename = None ovr_level = None while i < len(argv): if argv[i] == "-f": output_format = argv[i + 1] i = i + 1 elif argv[i] == "-ovr": ovr_level = int(argv[i + 1]) i = i + 1 elif argv[i][0] == "-": return Usage() elif in_filename is None: in_filename = argv[i] elif out_filename is None: out_filename = argv[i] else: return Usage() i = i + 1 if out_filename is None: return Usage() if output_format is None: output_format = GetOutputDriverFor(out_filename, is_raster=False) src_ds = gdal.Open(in_filename) out_ds = gdal.GetDriverByName(output_format).Create( out_filename, 0, 0, 0, gdal.GDT_Unknown ) first_band = src_ds.GetRasterBand(1) main_gt = src_ds.GetGeoTransform() for i in ( [ovr_level] if ovr_level is not None else range(1 + first_band.GetOverviewCount()) ): src_band = first_band if i == 0 else first_band.GetOverview(i - 1) out_lyr = out_ds.CreateLayer( "main_image" if i == 0 else ("overview_%d" % i), geom_type=ogr.wkbPolygon, srs=src_ds.GetSpatialRef(), ) blockxsize, blockysize = src_band.GetBlockSize() nxblocks = (src_band.XSize + blockxsize - 1) // blockxsize nyblocks = (src_band.YSize + blockysize - 1) // blockysize gt = [ main_gt[0], main_gt[1] * first_band.XSize / src_band.XSize, 0, main_gt[3], 0, main_gt[5] * first_band.YSize / src_band.YSize, ] for y in range(nyblocks): ymax = gt[3] + y * blockysize * gt[5] ymin = ymax + blockysize * gt[5] for x in range(nxblocks): xmin = gt[0] + x * blockxsize * gt[1] xmax = xmin + blockxsize * gt[1] f = ogr.Feature(out_lyr.GetLayerDefn()) wkt = ( "POLYGON((%.18g %.18g,%.18g %.18g,%.18g %.18g,%.18g %.18g,%.18g %.18g))" % (xmin, ymin, xmin, ymax, xmax, ymax, xmax, ymin, xmin, ymin) ) f.SetGeometryDirectly(ogr.CreateGeometryFromWkt(wkt)) out_lyr.CreateFeature(f) out_ds = None return 0 if __name__ == "__main__": sys.exit(main(sys.argv))