Hello,I am attempting to use the Viewshed operation with the geoprocessor in C#, and I am running into some wierdness. I need to create a feature in a shapefile dynamically, then feed that to the Viewshed op. This is my code to attempt this:
public void DoViewshed(string elevation, string points, string output)
{
object out_raster = GetOutRaster<byte>( output, elevation );
Viewshed op2 = new Viewshed();
IFeatureClass source = OpenFeatureDataset( points );
IPoint pt = new PointClass();
pt.ID = 0;
pt.X = 2478878.882;
pt.Y = 363573.950;
IFeature feature = source.CreateFeature();
feature.Shape = pt;
feature.Store();
op2.in_raster = elevation;
op2.in_observer_features = points; // I tried using source, too, but that doesn't work, either.
op2.out_raster = out_raster;
op2.curvature_correction = "FLAT_EARTH";
op2.z_factor = 1;
_gp.Execute( op2, null );
IFeatureCursor crsr = source.Update(null,false);
crsr.NextFeature();
crsr.DeleteFeature();
}
When I do this, I get an error from the geoprocessor: "ERROR 010067: Error in executing grid expression. Error while reading record [%1%]"My question is: am I doing this the right way? Is there another way I can create a feature in a shapefile and feed it to the Viewshed op?Thanks
