[fdo-users] Spatial Filter Help Needed
Rob.Sosnowski at itd.idaho.gov
Thu Oct 2 12:56:53 EDT 2008
Can you give an idea of how to apply the filter to the select command. I
thought the sel.SetFilter did that. Perhaps, I'll try sel.Filter =
I will also try Geometry.
Jackie Ng wrote:
> I see two things:
> 1) The filter is being created but not being applied to the select
> 2) I don't think you can apply filters on "aliased" properties. You should
> be able to filter on the "Geometry" property and get the same result.
> - Jackie
> surrounded wrote:
>> I'm trying to intersect a circle (created from input coordinates) with a
>> shapefile. I've created the circle geometry and am now trying to set up
>> the filter. In the code below, the statement
>> throws the follwing exception:
>> "The property 'Shape' is not in the readers selected property set"
>> OSGeo.FDO.Expression.GeometryValue pGVal = new
>> OSGeo.FDO.Expression.ComputedIdentifier pPropName = new
>> ComputedIdentifier("Shape", new Identifier("Geometry"));
>> IdentifierCollection pIDColl = sel.PropertyNames;
>> OSGeo.FDO.Filter.Filter pPtLineFilter = new
>> OSGeo.FDO.Filter.SpatialOperations.SpatialOperations_Intersect, pGVal); }
>> OSGeo.FDO.Commands.Feature.IFeatureReader reader = sel.Execute();
>> while (reader.ReadNext())
>> ......some code....
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