How to change the field value of a Shapefile using GDAL/OGR?

Question

I am trying to change the field value of a shapefile. However it doesn't change the value. What's wrong with my code?

import ogr

driver = ogr.GetDriverByName('ESRI Shapefile')
fn = 'dist.shp'
dataSource = driver.Open(fn, 0)

layer = dataSource.GetLayer()
feature = layer.GetNextFeature()

dist = 233

while feature:
    feature.SetField("dist", dist)
    layer.SetFeature(feature)
    feature = layer.GetNextFeature()

dataSource.Destroy()

score 27 · Accepted Answer · edited Sep 25 '20 at 03:29

27

The second argument in Open specifies if the data can be updated (written to). Try:

dataSource = driver.Open(fn,1)

edited Sep 25 '20 at 03:29

Aaron

51,658
28
154
317

answered Oct 17 '13 at 18:49

Matthew Snape

6,127
2
27
48

This solution worked! confirmed from GDAL-PYTHON API. Default option is 0 i.e FALSE, otherwise 1 for TRUE incase updating is required – Erick Mar 09 '18 at 16:49

How to change the field value of a Shapefile using GDAL/OGR?

1 Answers1