[Gdal-dev] Define/overwrite projection on shapefile

[Vikalpa Jetly]

How would I use ogr to set/overwrite a projection for an existing shapefile?
I have a wkt projection say 'dref' that I want to use to set the projection.
I understand that while creating a new shapefile I can use:

 

sref = osr.SpatialReference()

sref.ImportFromWkt(dref)

layer = datasource.CreateLayer('newshape', geom_type=ogr.wkbPolygon, srs =
dref)

 

How would I do this for an existing shapefile? or do I need to create a copy
of the shapefile?

 

Thanks.

Vikalpa

 

 

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