#AU2013 Wish granted – Delete topo points in elevation range

Kelly asked “Is it possible to delete points within a range of elevation values?”


public void deleteTopoPointsByElevation()
    Document doc = this.ActiveUIDocument.Document;
    UIDocument uidoc = new UIDocument(doc);

    double min = 20;
    double max = 30;

    TopographySurface topo = doc.GetElement(uidoc.Selection.PickObject(ObjectType.Element)) as TopographySurface;
    IList<XYZ> pointsToDelete = new List<XYZ>();

    foreach (XYZ pt in topo.GetPoints())
        if (pt.Z > min && pt.Z < max)

    using (TopographyEditScope tes = new TopographyEditScope(doc, "Topo Edit Scope"))

            using (Transaction t = new Transaction(doc, "Update Topo"))

        tes.Commit(new myFailuresPreprocessor());

public class myFailuresPreprocessor : IFailuresPreprocessor
    public FailureProcessingResult PreprocessFailures(FailuresAccessor failuresAccessor)
        return FailureProcessingResult.Continue;

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