[gdal-dev] Add a new filed to an existing shapefile

[Frank Warmerdam]

Limei Ran wrote:
> Hi:
> 
> I am trying to add a new double field to an existing shapefile using the 
> following codes.  But,  poLayer->CreateField failed.  Could you tell me 
> what is wrong with the codes?

Limei,

I believe the shapefile driver does not support adding fields to a shapefile
layer that already has records/features in it.  This is fairly common in file
based drivers, though it *could* be implemented for shapefiles if there was
sufficient need.

Best regards,
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