#!/usr/bin/env python ############################################################################### # $Id: gdal2grd.py,v 1.1 2003/02/15 14:23:47 dron Exp $ # # Project: GDAL Python samples # Purpose: Script to write out ASCII GRD rasters (used in Golden Software Surfer) # from any source supported by GDAL. # Author: Andrey Kiselev, dron@remotesensing.org # ############################################################################### # Copyright (c) 2003, Andrey Kiselev <dron@remotesensing.org> # # 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. ############################################################################### # # $Log: gdal2grd.py,v $ # Revision 1.1 2003/02/15 14:23:47 dron # New # import gdal from gdalconst import * import Numeric import sys # ============================================================================= def Usage(): print 'Usage: gdal2grd.py [-b band] [-quiet] infile outfile' print sys.exit(1) # ============================================================================= infile = None outfile = None iBand = 1 quiet = 0 # Parse command line arguments. i = 1 while i < len(sys.argv): arg = sys.argv[i] if arg == '-b': i = i + 1 iBand = int(sys.argv[i]) elif arg == '-quiet': quiet = 1 elif infile is None: infile = arg elif outfile is None: outfile = arg else: Usage() i = i + 1 if infile is None: Usage() if outfile is None: Usage() indataset = gdal.Open(infile, GA_ReadOnly) if infile == None: print 'Cannot open', infile sys.exit(2) geotransform = indataset.GetGeoTransform() print geotransform band = indataset.GetRasterBand(iBand) if band == None: print 'Cannot load band', iBand, 'from the', infile sys.exit(2) if not quiet: print 'Size is ',indataset.RasterXSize,'x',indataset.RasterYSize,'x',indataset.RasterCount print 'Projection is ',indataset.GetProjection() print 'Origin = (',geotransform[0], ',',geotransform[3],')' print 'Pixel Size = (',geotransform[1], ',',geotransform[5],')' print 'Converting band number',iBand,'with type',gdal.GetDataTypeName(band.DataType) # Header printing fpout = open(outfile, "wt") fpout.write("DSAA\n") fpout.write(str(band.XSize) + " " + str(band.YSize) + "\n") fpout.write(str(geotransform[0] + geotransform[1] / 2) + " " + str(geotransform[0] + geotransform[1] * (band.XSize - 0.5)) + "\n") if geotransform[5] < 0: fpout.write(str(geotransform[3] + geotransform[5] * (band.YSize - 0.5)) + " " + str(geotransform[3] + geotransform[5] / 2) + "\n") else: fpout.write(str(geotransform[3] + geotransform[5] / 2) + " " + str(geotransform[3] + geotransform[5] * (band.YSize - 0.5)) + "\n") fpout.write(str(band.ComputeRasterMinMax(0)[0]) + " " + str(band.ComputeRasterMinMax(0)[1]) + "\n") for i in range(band.YSize - 1, -1, -1): scanline = band.ReadAsArray(0, i, band.XSize, 1, band.XSize, 1) j = 0 while j < band.XSize: fpout.write(str(scanline[0, j])) j = j + 1 if j % 10: # Print no more than 10 values per line fpout.write(" ") else: fpout.write("\n") fpout.write("\n")