On 06-09-2011 17:48, Frank Warmerdam wrote:
On Tue, Sep 6, 2011 at 8:48 AM, Joaquim Luis<jl...@ualg.pt> wrote:
OGR_G_* functions are intended to operate on OGRGeometry objects while
OSR* functions operate on OGRSpatialReferences. Your hSRS object is an
OGRSpatialReference and not suitable to pass to OGR_G_ExportToWkt().
You should use OSRExportToWkt() to translate an OGRSpatialReference into
it's
WKT representation.
Best regards,
Thanks Frank.
This is also a result of my attempt to understand all the OGR model plus
inventing a way of wrapping it all inside a single StructureArray (the C-MEX
API). So let me ask one further question about the model. Is is possible to
have the case
Dataset --> SRS
--> Feature1 --> Geom1 --> SRS1
--> Feature2 --> Geom2 --> SRS2
--> ...
that is, different SpatialReferences inside the same Dataset?
Joaquim,
While not nailed down strictly, it is expected that
all geometries in a layer will share the same coordinate
system. It is however common for the geometries
to be lacking the spatial reference object even though it
is set on the layer.
Best regards,ject
OK, that's what I assumed too and the root of my error when tried to
call OGR_G_ExportToWkt on a spatial reference object.
Thanks again
Joaquim
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