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#!/usr/bin/env python
###############################################################################
# $Id: tigerpoly.py 13104 2007-11-26 21:23:48Z hobu $
#
# Project: OGR Python samples
# Purpose: Create OGR VRT from source datasource
# Author: Frank Warmerdam, warmerdam@pobox.com
#
###############################################################################
# Copyright (c) 2009, 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.
###############################################################################
try:
from osgeo import osr, ogr, gdal
except ImportError:
import osr, ogr, gdal
import string
import sys
#############################################################################
def GeomType2Name( type ):
if type == ogr.wkbUnknown:
return 'wkbUnknown'
elif type == ogr.wkbPoint:
return 'wkbPoint'
elif type == ogr.wkbLineString:
return 'wkbLineString'
elif type == ogr.wkbPolygon:
return 'wkbPolygon'
elif type == ogr.wkbMultiPoint:
return 'wkbMultiPoint'
elif type == ogr.wkbMultiLineString:
return 'wkbMultiLineString'
elif type == ogr.wkbMultiPolygon:
return 'wkbMultiPolygon'
elif type == ogr.wkbGeometryCollection:
return 'wkbGeometryCollection'
elif type == ogr.wkbNone:
return 'wkbNone'
elif type == ogr.wkbLinearRing:
return 'wkbLinearRing'
else:
return 'wkbUnknown'
#############################################################################
def Esc(x):
return gdal.EscapeString( x, gdal.CPLES_XML )
#############################################################################
def Usage():
print('Usage: ogr2vrt.py [-relative] [-schema] ')
print(' in_datasource out_vrtfile [layers]')
print('')
sys.exit(1)
#############################################################################
# Argument processing.
infile = None
outfile = None
layer_list = []
relative = "0"
schema=0
argv = gdal.GeneralCmdLineProcessor( sys.argv )
if argv is None:
sys.exit( 0 )
i = 1
while i < len(argv):
arg = argv[i]
if arg == '-relative':
relative = "1"
elif arg == '-schema':
schema = 1
elif infile is None:
infile = arg
elif outfile is None:
outfile = arg
else:
layer_list.append( arg )
i = i + 1
if outfile is None:
Usage()
#############################################################################
# Open the datasource to read.
src_ds = ogr.Open( infile, update = 0 )
if schema:
infile = '@dummy@'
if len(layer_list) == 0:
for layer in src_ds:
layer_list.append( layer.GetLayerDefn().GetName() )
#############################################################################
# Start the VRT file.
vrt = '<OGRVRTDataSource>\n'
#############################################################################
# Process each source layer.
for name in layer_list:
layer = src_ds.GetLayerByName(name)
layerdef = layer.GetLayerDefn()
vrt += ' <OGRVRTLayer name="%s">\n' % Esc(name)
vrt += ' <SrcDataSource relativeToVRT="%s" shared="%d">%s</SrcDataSource>\n' \
% (relative,not schema,Esc(infile))
if schema:
vrt += ' <SrcLayer>@dummy@</SrcLayer>\n'
else:
vrt += ' <SrcLayer>%s</SrcLayer>\n' % Esc(name)
vrt += ' <GeometryType>%s</GeometryType>\n' \
% GeomType2Name(layerdef.GetGeomType())
srs = layer.GetSpatialRef()
if srs is not None:
vrt += ' <LayerSRS>%s</LayerSRS>\n' \
% (Esc(srs.ExportToWkt()))
# Process all the fields.
for fld_index in range(layerdef.GetFieldCount()):
src_fd = layerdef.GetFieldDefn( fld_index )
if src_fd.GetType() == ogr.OFTInteger:
type = 'Integer'
elif src_fd.GetType() == ogr.OFTString:
type = 'String'
elif src_fd.GetType() == ogr.OFTReal:
type = 'Real'
elif src_fd.GetType() == ogr.OFTStringList:
type = 'StringList'
elif src_fd.GetType() == ogr.OFTIntegerList:
type = 'IntegerList'
elif src_fd.GetType() == ogr.OFTRealList:
type = 'RealList'
elif src_fd.GetType() == ogr.OFTBinary:
type = 'Binary'
elif src_fd.GetType() == ogr.OFTDate:
type = 'Date'
elif src_fd.GetType() == ogr.OFTTime:
type = 'Time'
elif src_fd.GetType() == ogr.OFTDateTime:
type = 'DateTime'
else:
type = 'String'
vrt += ' <Field name="%s" type="%s"' \
% (Esc(src_fd.GetName()), type)
if not schema:
vrt += ' src="%s"' % Esc(src_fd.GetName())
if src_fd.GetWidth() > 0:
vrt += ' width="%d"' % src_fd.GetWidth()
if src_fd.GetPrecision() > 0:
vrt += ' precision="%d"' % src_fd.GetPrecision()
vrt += '/>\n'
vrt += ' </OGRVRTLayer>\n'
vrt += '</OGRVRTDataSource>\n'
#############################################################################
# Write vrt
open(outfile,'w').write(vrt)
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