[Gdal-dev] How to use SetSpatialFilter()

Mir Hassan Ali mirhassanali at gmail.com
Tue Nov 7 06:08:06 EST 2006


I am using the C# wrapper for GDAL in my application. I want to use
SetSpatialFilter() method on a layer. I have an area defined by the
<extent>  * *      <type>*area*</type>
 * *      <coord-string>*

I am trying to set this area as spatial filter for the layer by using the
following code

layer.SetSpatialFilter(new Geometry(ogr.wkbGeometryCollection ,
"RECTANGLE(393546 377079 393544 377081 393542 377079 393544 377077)", 0,
null, null));

But doing this does not return the desired result. It returns feature count
as zero, rather than returning the features. Could someone please guide me
how to use this function correctly.
I apologise for asking such a basic question, but I am new to the GIS stuff
so I hope you won't mind.
Any help will be appreciated.

Best Regards

Mir Hassan Ali
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