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#!/usr/bin/env python
###############################################################################
# $Id: val_repl.py,v 1.2 2004/04/24 16:21:05 warmerda Exp $
#
# Project: GDAL Python samples
# Purpose: Script to replace specified values from the input raster file
# with the new ones. May be useful in cases when you don't like
# value, used for NoData indication and want replace it with other
# value. Input file remains unchanged, results stored in other file.
# 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: val_repl.py,v $
# Revision 1.2 2004/04/24 16:21:05 warmerda
# Updated to use numeric operators to replace values.
#
# Revision 1.1 2003/02/15 09:16:13 dron
# New
#
#
import gdal
from gdalconst import *
import Numeric
import sys
# =============================================================================
def Usage():
print 'Usage: val_repl.py -innd in_nodata_value -outnd out_nodata_value'
print ' [-of out_format] [-ot out_type] infile outfile'
print
sys.exit( 1 )
# =============================================================================
# =============================================================================
def ParseType(type):
if type == 'Byte':
return GDT_Byte
elif type == 'Int16':
return GDT_Int16
elif type == 'UInt16':
return GDT_UInt16
elif type == 'Int32':
return GDT_Int32
elif type == 'UInt32':
return GDT_UInt32
elif type == 'Float32':
return GDT_Float32
elif type == 'Float64':
return GDT_Float64
elif type == 'CInt16':
return GDT_CInt16
elif type == 'CInt32':
return GDT_CInt32
elif type == 'CFloat32':
return GDT_CFloat32
elif type == 'CFloat64':
return GDT_CFloat64
else:
return GDT_Byte
# =============================================================================
inNoData = None
outNoData = None
infile = None
outfile = None
format = 'GTiff'
type = GDT_Byte
# Parse command line arguments.
i = 1
while i < len(sys.argv):
arg = sys.argv[i]
if arg == '-innd':
i = i + 1
inNoData = float(sys.argv[i])
elif arg == '-outnd':
i = i + 1
outNoData = float(sys.argv[i])
elif arg == '-of':
i = i + 1
format = sys.argv[i]
elif arg == '-ot':
i = i + 1
type = ParseType(sys.argv[i])
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()
if inNoData is None:
Usage()
if outNoData is None:
Usage()
indataset = gdal.Open( infile, GA_ReadOnly )
out_driver = gdal.GetDriverByName(format)
outdataset = out_driver.Create(outfile, indataset.RasterXSize, indataset.RasterYSize, indataset.RasterCount, type)
for iBand in range(1, indataset.RasterCount + 1):
inband = indataset.GetRasterBand(iBand)
outband = outdataset.GetRasterBand(iBand)
for i in range(inband.YSize - 1, -1, -1):
scanline = inband.ReadAsArray(0, i, inband.XSize, 1, inband.XSize, 1)
scanline = Numeric.choose( Numeric.equal( scanline, inNoData),
(scanline, outNoData) )
outband.WriteArray(scanline, 0, i)
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