Rutger,
Thanks, that did the trick.
-Steve
On 4/4/2017 6:15 AM, Rutger wrote:
Stephen Woodbridge wrote
On 4/3/2017 11:37 PM, jratike80 wrote:
Stephen Woodbridge wrote
Hi Jukka,
Ahh, good point, I always seem to forget that fact.
I have gotten the python code to add the new fields, but the data is not
getting written to the file.
# open the shapefile
driver = ogr.GetDriverByName('ESRI Shapefile')
dataSource = driver.Open(infile, 1) # open for rw
if dataSource is None:
print "ERROR: could not open '%s' as shapefile!" % (infile)
sys.exit(1)
layer = dataSource.GetLayer()
layer.CreateField(ogr.FieldDefn("area", ogr.OFTReal))
for feature in layer:
geom = feature.GetGeometryRef()
feature.SetField("area", geom.GetArea())
feature = None
dataSource = None
In the cookbook example for "Create a New Shapefile and Add Data" there
is a call to:
layer.CreateFeature(feature)
but I do not see an equivalent call for:
layer.UpdateFeature(feature)
So How do I update the feature and force the data to get written to the
shapefile. I'm presuming the CreateFeature will append a new record
which is not what I want.
-Steve
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Hey Stephen,
I think you looking for "layer.SetFeature(feature)", which you can add right
before destroying the changed feature object withing your loop.
Regards,
Rutger
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