[Gdal-dev] Modifying OGR geometry in place

[Petteri Packalen]

Hi

I'm switching from shapelib to OGR and I don't understand how geometry can 
be modified in place. My purpose is to modify z-values of the point file.

The current approach is as follows:

   1. I create a copy of input file by using CopyDataSource(). This
      will be the output file where z-value is modified.

   2. I loop through the features by using GetNextFeature() method.

   3. This is unclear for me. How can I fetch the geometry object from
      feature such a way that I can manipulate it and write back to the
      disk? Or is this even possible (or should I create a completely new
      feature)?

It is also unclear for me that what will be the update mode of created
data source after CopyDataSource()?

Thanks in advance,

Petteri

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Petteri Packalén                   "There are two major products that
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