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Re: IDL-Python bridge with GDAL/OGR [message #93691 is a reply to message #93690]

Fri, 30 September 2016 12:02

Gordon Farquharson
Messages: 48
Registered: December 2010

Member

Hi Jim

Thanks for the suggestion.

On Friday, September 30, 2016 at 11:52:30 AM UTC-7, Jim P wrote:
> Instead of the syntax
> IDL> srs = osr.SpatialReference()
> what if you try the following?
> IDL> srs = osr.SpatialReference
>
> The error message indicates that by calling the object creation, you're getting a reference to the proxy SWIG object instead of a reference the underlying python object.

Your idea makes a difference, but results in a different error:

IDL> srs = osr.SpatialReference
IDL> srs
<class 'osgeo.osr.SpatialReference'>
IDL> srs.ImportFromProj4('+proj=utm +zone=10 +ellps=WGS84 +datum=WGS84 +units=m +no_defs')
% PYTHON_CALLMETHOD: Exception: unbound method ImportFromProj4() must be
called with SpatialReference instance as first
argument (got str instance instead).
IDL> srs.ImportFromProj4(srs, '+proj=utm +zone=10 +ellps=WGS84 +datum=WGS84 +units=m +no_defs')
% PYTHON_CALLMETHOD: Exception: unbound method ImportFromProj4() must be
called with SpatialReference instance as first
argument (got type instance instead).

There seem to be subtleties of the IDL-Python bridge that I do not understand.

Gordon

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[Message index]

		IDL-Python bridge with GDAL/OGR By: Gordon Farquharson on Fri, 30 September 2016 10:51
		Re: IDL-Python bridge with GDAL/OGR By: Gordon Farquharson on Fri, 30 September 2016 11:21
		Re: IDL-Python bridge with GDAL/OGR By: Jim Pendleton on Fri, 30 September 2016 11:52
		Re: IDL-Python bridge with GDAL/OGR By: Gordon Farquharson on Fri, 30 September 2016 12:02

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