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#!/usr/bin/env python
##############################################################################
# #
# las2tindex.py #
# #
# begin : 2012-03-14 #
# authors: Luca Delucchi #
# copyright : (C) 2012 by luca delucchi, Fondazione Edmund Mach #
# email : lucadelucchi at fmach dot it #
# #
# All rights reserved. #
# #
# 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 #
##############################################################################
import sys, os
import optparse
import subprocess
import re
try:
import osgeo.ogr as ogr
import osgeo.osr as osr
except ImportError:
try:
import osgeo.ogr as ogr
import osgeo.osr as osr
except ImportError:
print "GDAL Python is missing"
sys.exit( 1 )
try:
import liblas
llas = True
except:
print "libLas python is missing, using script"
llas = False
#classes for required options
strREQUIRED = 'required'
class OptionWithDefault(optparse.Option):
ATTRS = optparse.Option.ATTRS + [strREQUIRED]
def __init__(self, *opts, **attrs):
if attrs.get(strREQUIRED, False):
attrs['help'] = '(Required) ' + attrs.get('help', "")
optparse.Option.__init__(self, *opts, **attrs)
class OptionParser(optparse.OptionParser):
def __init__(self, **kwargs):
kwargs['option_class'] = OptionWithDefault
optparse.OptionParser.__init__(self, **kwargs)
def check_values(self, values, args):
for option in self.option_list:
if hasattr(option, strREQUIRED) and option.required:
if not getattr(values, option.dest):
self.error("option %s is required" % (str(option)))
return optparse.OptionParser.check_values(self, values, args)
def main():
"""Main function"""
#usage
usage = "usage: %prog [options] las_files"
parser = OptionParser(usage=usage)
#output filename
parser.add_option("-o", "--output", dest="name", required=True,
help="output file")
#ogr format
parser.add_option("-f", "--format", dest="ogr", default='ESRI Shapefile',
metavar="OGR", help="OGR format for output file" \
+ " [default=%default]")
#epsg code
parser.add_option("-e", "--epsg", dest="epsg", default=4326,
metavar="EPSG", help="EPSG code of input and output file" \
+ " [default=%default]")
#return options and argument
(options, args) = parser.parse_args()
#test if args[0] it is set
if len(args) == 0:
parser.error("You have to pass the las files to create the tile index")
#create the SpatialReference from epsg code
outSpatial = osr.SpatialReference()
outSpatial.ImportFromEPSG(int(options.epsg))
#create the output driver
outDriver = ogr.GetDriverByName(options.ogr)
if outDriver is None:
print "%s driver not available.\n" % options.ogr
sys.exit( 1 )
outputDSN = options.name
#search if the file already exist
if os.path.exists(outputDSN):
outDriver.DeleteDataSource(outputDSN)
#create output datasource
outDatasource = outDriver.CreateDataSource(outputDSN)
if outDatasource is None:
print "Creation of output file failed.\n"
sys.exit( 1 )
#create output layer
outLayer = outDatasource.CreateLayer('las2tindex', srs=outSpatial, geom_type=ogr.wkbPolygon)
if outLayer is None:
print "Layer creation failed.\n"
sys.exit( 1 )
#output field definition
outField = ogr.FieldDefn("location", ogr.OFTString)
outField.SetWidth( 32 )
if outLayer.CreateField ( outField ) != 0:
print "Creating 'location' field failed.\n"
sys.exit( 1 )
#for each file create the polygon of bounding box
for i in args:
# if python liblas it is present use it
if llas:
lasfile = liblas.file.File(i,mode='r')
header = lasfile.header
minimum = header.get_min()
maximum = header.get_max()
# else use lasinfo command
elif not llas:
command = "lasinfo %s" % i
lasout = subprocess.Popen(command, shell=True,stdout=subprocess.PIPE).stdout
bbox = []
# for each line of output check min and max values
for line in lasout.readlines():
if re.search(r'Min X Y Z:', line) is not None or \
re.search(r'Max X Y Z:', line) is not None:
values=line.split(':')[1].lstrip().split()
del values[0]
bbox.append(values)
if len(bbox) == 2:
break
minimum = bbox[0]
maximum = bbox[1]
#create the points of polygon
ld = "%s %s" % (minimum[0],minimum[1])
lu = "%s %s" % (minimum[0],maximum[1])
ru = "%s %s" % (maximum[0],maximum[1])
rd = "%s %s" % (maximum[0],minimum[1])
# create the feature
feat = ogr.Feature( outLayer.GetLayerDefn())
feat.SetField( "location", i )
wkt = 'POLYGON((%s,%s,%s,%s,%s))' % (ld, lu, ru, rd, ld)
poly = ogr.CreateGeometryFromWkt(wkt, outSpatial)
feat.SetGeometry(poly)
#load the feature into vector layer
if outLayer.CreateFeature(feat) != 0:
print "Failed to create feature in vector file.\n"
sys.exit( 1 )
feat.Destroy()
outDatasource = None
print "%s created" % outputDSN
#add options
if __name__ == "__main__":
main()
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