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#!/usr/bin/env python
#******************************************************************************
# $Id: gcps2vec.py,v 1.2 2006/03/21 21:54:00 fwarmerdam Exp $
#
# Project: GDAL
# Purpose: Convert GCPs to a point layer.
# Author: Frank Warmerdam, warmerdam@pobox.com
#
#******************************************************************************
# Copyright (c) 2005, Frank Warmerdam <warmerdam@pobox.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.
#******************************************************************************
#
# $Log: gcps2vec.py,v $
# Revision 1.2 2006/03/21 21:54:00 fwarmerdam
# fixup headers
#
# Revision 1.1 2005/02/07 14:36:12 fwarmerdam
# New
#
#
import gdal
import ogr
import sys
def Usage():
print 'Usage: gcp2vec.py [-of <ogr_drivername>] <raster_file> <vector_file>'
sys.exit(1)
# =============================================================================
# Mainline
# =============================================================================
format = 'GML'
in_file = None
out_file = None
pixel_out = 0
gdal.AllRegister()
argv = gdal.GeneralCmdLineProcessor( sys.argv )
if argv is None:
sys.exit( 0 )
# Parse command line arguments.
i = 1
while i < len(argv):
arg = argv[i]
if arg == '-of':
format = argv[i]
if arg == '-p':
pixel_out = 1
elif in_file is None:
in_file = argv[i]
elif out_file is None:
out_file = argv[i]
else:
Usage()
i = i + 1
if out_file is None:
Usage()
# ----------------------------------------------------------------------------
# Open input file, and fetch GCPs.
# ----------------------------------------------------------------------------
ds = gdal.Open( in_file )
if ds is None:
print 'Unable to open ', filename
sys.exit(1)
gcp_srs = ds.GetGCPProjection()
gcps = ds.GetGCPs()
ds = None
if gcps is None or len(gcps) == 0:
print 'No GCPs on file %s!' % in_file
sys.exit(1)
# ----------------------------------------------------------------------------
# Create output file, and layer.
# ----------------------------------------------------------------------------
drv = ogr.GetDriverByName( format )
if drv is None:
print 'No driver named %s available.' % format
sys.exit(1)
ds = drv.CreateDataSource( out_file )
srs = None
layer = ds.CreateLayer( 'gcps', srs, geom_type = ogr.wkbPoint25D )
if pixel_out == 0:
fd = ogr.FieldDefn( 'Pixel', ogr.OFTReal )
layer.CreateField( fd )
fd = ogr.FieldDefn( 'Line', ogr.OFTReal )
layer.CreateField( fd )
else:
fd = ogr.FieldDefn( 'X', ogr.OFTReal )
layer.CreateField( fd )
fd = ogr.FieldDefn( 'Y', ogr.OFTReal )
layer.CreateField( fd )
fd = ogr.FieldDefn( 'Id', ogr.OFTString )
layer.CreateField( fd )
fd = ogr.FieldDefn( 'Info', ogr.OFTString )
layer.CreateField( fd )
# ----------------------------------------------------------------------------
# Write GCPs.
# ----------------------------------------------------------------------------
for gcp in gcps:
feat = ogr.Feature( layer.GetLayerDefn() )
geom = ogr.Geometry( ogr.wkbPoint25D )
if pixel_out == 0:
feat.SetField( 'Pixel', gcp.GCPPixel )
feat.SetField( 'Line', gcp.GCPLine )
geom.SetPoint( 0, gcp.GCPX, gcp.GCPY, gcp.GCPZ )
else:
feat.SetField( 'X', gcp.GCPX )
feat.SetField( 'Y', gcp.GCPY )
geom.SetPoint( 0, gcp.GCPPixel, gcp.GCPLine )
feat.SetField( 'Id', gcp.Id )
feat.SetField( 'Info', gcp.Info )
feat.SetGeometryDirectly( geom )
layer.CreateFeature( feat )
feat = None
ds.Destroy()
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