I should have sent this to the list and not just Jorge. Anyway, the
problem is solved.
Jorge Arevalo kirjoitti:
The problem is that the MEM-based layer doesn't have fields. So, if I
use "0" as iPixValField, I get an error, because there's no field with
index 0 in the Feature. Of course, the same result if I use any value
0.
I thought the solution was to "modify" the Layer's Feature Definition
to allow fields in the Features created. So, I created a new Feature
Defintion, with a Field Definition of one field, of type OFTReal.
Then, I created a new Feature following this schema, and I added this
Feature to the Layer. I know, it's not the best way, and it didn't
work. But I don't know how to "force" the MEM-based layer to allow
fields in its features.
Jorge,
You can manipulate (well, add fields only) the schema of the layer with
the CreateField method:
http://www.gdal.org/ogr/classOGRLayer.html#00b1376a1eabb1298ef278f92f6d84be
This works for in-memory layers. Depending on the driver, when you add a
feature, the schema may become read-only.
Best regards,
Ari
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