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Error on ESRI samples

Nov 30, 2006 at 3:55 AM
Hi, im using SharpMap for .NET Compact Framework (pocketPC) and probably will merge it with parts of ShapeLib and NTS.

Using several shapefiles provided by ESRI and others, a click on a feature results in it an the surrounding ones also selected. I'm trying to show features attributes on the screen.

//A boundingBox surrounding the clicked point
SharpMap.Geometries.Point p1 = myMap.ImageToWorld(new System.Drawing.Point(e.X, e.Y));
SharpMap.Geometries.Point p2 = myMap.ImageToWorld(new System.Drawing.Point(e.X1, e.Y1));

BoundingBox clickBBox = new BoundingBox(p1, p2);

//Filling the table
FeatureDataSet fds = new FeatureDataSet();
myLayer.DataSource.ExecuteIntersectionQuery(clickBBox, fds);

//A new layer for viewing the selected feature
VectorLayer newLayer = new VectorLayer("atrib");
newLayer.DataSource = new GeometryProvider(fds.Tables0);


Goes well, but more than 1 feature is selected, even when im using entrire countries, and clicking not in the borders.

Nov 30, 2006 at 5:26 AM
The Shapefile provider currently only support box/box intersection checking. You can use NTS to filter the remaining extra feaures (see the WIKI and the docs)
Dec 1, 2006 at 10:15 PM
Thanks Odegaard, i think i'll try to fix it myself.