[gdal-dev] Accessing GDAL/OGR From Python: Simple Feature and
warmerdam at pobox.com
Thu Nov 26 12:24:41 EST 2009
Sunburned Surveyor wrote:
> Is there a OGR programming construct to represent a simple feature?
The OGRGeometry class represents a simple feature geometry. The
OGRFeature class extends this to a feature with attributes and
a feature id. I would suggest reviewing the OGR Architecture
> there is, can you tell me where to look for the Python files that
> would represent these simple features?
GDAL/OGR includes excellent Python bindings. Some background
information is available at:
> Is there any example Python
> code that will show me how to obtain simple features from an ESRI
The GdalOgrInPython doc points to a variety of samples and utilities
implemented in Python. The:
script is an example of reading features from one source and writing
them to a shapefile and might be helpful. The
script reads a raster and converts to x/y/z text format and might
be a decent model for accessing raster data.
> I also need to know if GDAL has programming constructs to work with
> elevation grids. If it does, where do I look for those Python files?
Elevation grids are rasters covered by the "GDAL" side of GDAL/OGR.
You would "from osgeo import gdal" to get the interfaces. Lots of docs
on the GDAL page including:
> I know everyone is busy. I don't want anyone to write my code for me,
> but any suggestions on where I start looking in the source code so I
> can learn how to do what I need with the library is appreciated.
With all respect I *feel* like you haven't yet really made a major
effort to scour the GDAL/OGR web site for information yet.
> I will make a commitment to make documentation/Python code for working
> with GDAL/ODR that results from our project available to everyone that
> is interested.
It might be suitable for submission to the Python samples directories.
Also feel free to improve the GdalOgrInPython Trac page.
I set the clouds in motion - turn up | Frank Warmerdam, warmerdam at pobox.com
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