Created
February 2, 2011 19:12
-
-
Save jgomezdans/808194 to your computer and use it in GitHub Desktop.
Buffer a vector file using OGR. From http://www.xxki.com/tutorial/pukiwiki.php?cmd=read&page=Python%2FGDAL%20and%20OGR
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/env python | |
#buffer.py | |
import sys | |
import os | |
from osgeo import ogr | |
from osgeo import osr | |
def buffer(infile,outfile,buffdist): | |
try: | |
ds_in=ogr.Open( infile ) | |
lyr_in=ds_in.GetLayer( 0 ) | |
drv=ds_in.GetDriver() | |
if os.path.exists( outfile ): | |
drv.DeleteDataSource(outfile) | |
ds_out = drv.CreateDataSource( outfile ) | |
layer = ds_out.CreateLayer( lyr_in.GetLayerDefn().GetName(), \ | |
lyr_in.GetSpatialRef(), ogr.wkbPolygon) | |
n_fields = lyr_in.GetLayerDefn().GetFieldCount() | |
for i in xrange ( lyr_in.GetLayerDefn().GetFieldCount() ): | |
field_in = lyr_in.GetLayerDefn().GetFieldDefn( i ) | |
fielddef = ogr.FieldDefn( field_in.GetName(), field_in.GetType() ) | |
layer.CreateField ( fielddef ) | |
featuredefn = layer.GetLayerDefn() | |
for feat in lyr_in: | |
geom = feat.GetGeometryRef() | |
#feature = ogr.Feature(featuredefn) | |
#pdb.set_trace() | |
feature = feat.Clone() | |
feature.SetGeometry(geom.Buffer(float(buffdist))) | |
#for in in xrange ( n_fields ): | |
#feature.SetField ( | |
layer.CreateFeature(feature) | |
del geom | |
ds_out.Destroy() | |
except: | |
return False | |
return True | |
if __name__=='__main__': | |
usage='usage: buffer <infile> <outfile> <distance>' | |
if len(sys.argv) == 4: | |
if buffer(sys.argv[1],sys.argv[2],sys.argv[3]): | |
print 'Buffer succeeded!' | |
sys.exit(0) | |
else: | |
print 'Buffer failed!' | |
sys.exit(1) | |
else: | |
print usage | |
sys.exit(1) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Does the output file have to be created or will it create an output file?