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#!/usr/bin/env python
###############################################################################
# $Id: gdal2grd.py 18195 2009-12-06 20:24:39Z rouault $
#
# 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.
###############################################################################
try:
from osgeo import gdal
from osgeo.gdalconst import *
gdal.TermProgress = gdal.TermProgress_nocb
except ImportError:
import gdal
from gdalconst import *
try:
import numpy as Numeric
Numeric.arrayrange = Numeric.arange
except ImportError:
import Numeric
import sys
# =============================================================================
def Usage():
print('Usage: gdal2grd.py [-b band] [-quiet] infile outfile')
print('Write out ASCII GRD rasters (used in Golden Software Surfer)')
print('')
print(' -b band Select a band number to convert (1 based)')
print(' -quiet Do not report any diagnostic information')
print(' infile Name of the input GDAL supported file')
print(' outfile Name of the output GRD file')
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()
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")
# Display progress report on terminal
if not quiet:
gdal.TermProgress(float(band.YSize - i) / band.YSize)
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