[fdo-users] Creating a spatial filter

[simon hope]

Hi Dan,

I tried the following:

            //set the geometry fields
            qryPropName = new OSGeo.FDO.Expression.Identifier("shape");

            //create a geometry from a poly
            poly =
(OSGeo.FDO.Geometry.IPolygon)geomFactory.CreateGeometry("POLYGON((176954.045
5914119.79, 1769564.823 5914473.302, 1770089.64 5914474.08, 1770091.198
5914117.454, 176954.045 5914119.79))");
            geom = geomFactory.CreateGeometry(poly);
          
            //create the byte array required to create the expression
            byteArray = geomFactory.GetWkb(geom);
            OSGeo.FDO.Expression.GeometryValue qryGeomVal = new
OSGeo.FDO.Expression.GeometryValue(byteArray);
            
            //create the filter
            OSGeo.FDO.Filter.Filter fltr;
            fltr = new OSGeo.FDO.Filter.SpatialCondition(qryPropName,
OSGeo.FDO.Filter.SpatialOperations.SpatialOperations_Intersects,
qryGeomVal);

            //set the filter on the query command
            qrySelect.SetFilter(fltr.ToString());
 
And I get the same issue - I also tried creating the byteArray directly from
the poly object i.e.

byteArray = geomFactory.GetWkb(poly);

But i get the same message - is it advisable to use this method to create
polygons? i.e from a WKT or is it better to use LinearRings?

Cheers

Simon


Dan Stoica wrote:
> 
> Hi,
> 
> Use a IPolygon instead of IEnvelope.
> 
> Dan.
> 
> -----Original Message-----
> From: fdo-users-bounces at lists.osgeo.org
> [mailto:fdo-users-bounces at lists.osgeo.org] On Behalf Of simon hope
> Sent: Tuesday, December 04, 2007 2:08 AM
> To: fdo-users at lists.osgeo.org
> Subject: [fdo-users] Creating a spatial filter
> 
> 
> Hello,
> 
> I'm attempting to create a spatial filter against an SDE FeatureClass. I'm
> hitting a problem with the code below:
> 
>             byte[] byteArray;
>             OSGeo.FDO.Geometry.IGeometry geom;
>             OSGeo.FDO.Geometry.IEnvelope env;
>             OSGeo.FDO.Geometry.FgfGeometryFactory geomFactory = new
> OSGeo.FDO.Geometry.FgfGeometryFactory();
>             OSGeo.FDO.Expression.Identifier qryPropName;
> 
>             try
>             {
> 
>             //set the geometry fields
>             qryPropName = new OSGeo.FDO.Expression.Identifier("shape");
> 
>             //create a geometry from an envelope
>             env =
> geomFactory.CreateEnvelopeXY(1765068.119,5916635.233,1765756.4,5917101.847);
>             geom = geomFactory.CreateGeometry(env);
> 
>             //create the byte array required to create the expression
>             byteArray = geomFactory.GetWkb(geom);
>             OSGeo.FDO.Expression.GeometryValue qryGeomVal = new
> OSGeo.FDO.Expression.GeometryValue(byteArray);
> 
>             //create the filter
>             OSGeo.FDO.Filter.Filter fltr;
>             fltr = new OSGeo.FDO.Filter.SpatialCondition(qryPropName,
> OSGeo.FDO.Filter.SpatialOperations.SpatialOperations_Intersects,
> qryGeomVal);
> 
>             //set the filter on the query command
>             qrySelect.SetFilter(fltr.ToString());
> 
>             }
>             catch (Exception ex)
>             {
>                 throw new Exception(ex.ToString());
>             }
>             finally
>             {
>                 //todo clean up
>             }
> 
> the code falls over when i try and SetFilter - giving me an error:
> {"'FdoFgfGeometryFactory::CreateGeometryFromFgf': Unknown geometry type
> '769' discovered. "}
> 
> I've managed to create attribute filters, and have tried to follow that
> pattern for a spatial filter - should I be creating a specific geometry
> type?
> 
> Any ideas?
> 
> Cheers
> 
> Simon
> --
> View this message in context:
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> 
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