/// <summary>
/// Convenience method for doing pointwise precision reduction
/// on a single geometry,
/// with collapses removed
/// and keeping the geometry precision model the same,
/// but NOT preserving valid polygonal topology.
/// </summary>
/// <param name="g">The geometry to reduce</param>
/// <param name="precModel">The precision model to use</param>
/// <returns>The reduced geometry</returns>
public static IGeometry ReducePointwise(IGeometry g, IPrecisionModel precModel)
{
var reducer = new GeometryPrecisionReducer(precModel);
reducer.Pointwise = true;
return(reducer.Reduce(g));
}
public void Fixing_invalid_polygon_with_Buffer_0_returns_empty_polygon()
{
//arrange
var rdr = new WKTReader();
rdr.RepairRings = true;
var poly = rdr.Read(
@"POLYGON ((1.4749999999994841 -5.15, 30 -5.15, 48.9 -2,
108.1997 -2, 130.25148787313435 0.75647348414179227,
130.25148787313435 0.75647348414179161, 130 0.75,
126.3 0.72, 122.9 0.7, 119.2 0.42, 115.2 0.45,
111 0.29, 106.9 0.23, 102.8 0.2, 98.8 0.12, 94.8 0.04,
90.7 -0.08, 86.5 -0.2, 82.4 -0.42, 78.3 -0.57, 74.1 -0.69,
69.9 -0.78, 65.8 -0.87, 61.7 -1.07, 57.7 -1.09, 53.7 -1.229,
49.5 -1.289, 45.3 -1.369, 41.2 -1.719, 37 -2.409, 32.8 -3.219,
28.6 -3.769, 24.5 -4.089, 20.4 -4.429, 16.3 -4.599, 12.1 -4.759,
8 -4.889, 4 -5.049, 1.4749999999994841 -5.15))");
//act
var gpr = new NetTopologySuite.Precision.GeometryPrecisionReducer(new PrecisionModel(1e10));
//gpr.ChangePrecisionModel = true;
//gpr.Pointwise = false;
var poly1 = gpr.Reduce(poly);
var poly2 = poly.Buffer(0);
ToImage(0, poly, poly1, poly2);
var isValidOp = new IsValidOp(poly);
if (!isValidOp.IsValid)
{
Debug.WriteLine(isValidOp.ValidationError);
}
Debug.WriteLine(poly1.AsText());
// assert
//Assert.That(poly.IsValid, Is.True, "poly.IsValid");
Assert.That(poly1.IsValid, Is.True, "poly1.IsValid");
Assert.That(poly2, Is.Not.Null, "poly2 != null");
//Known to fail
//Assert.That(poly2.IsEmpty, Is.False, "poly2.IsEmpty");
}
/// <summary>
/// Convenience method for doing precision reduction
/// on a single geometry,
/// with collapses removed
/// and keeping the geometry precision model the same,
/// and preserving polygonal topology.
/// </summary>
/// <param name="g">The geometry to reduce</param>
/// <param name="precModel">The precision model to use</param>
/// <returns>The reduced geometry</returns>
public static Geometry Reduce(Geometry g, PrecisionModel precModel)
{
var reducer = new GeometryPrecisionReducer(precModel);
return(reducer.Reduce(g));
}
/// <summary>
/// Convenience method for doing precision reduction
/// on a single geometry,
/// with collapses removed
/// and keeping the geometry precision model the same,
/// and preserving polygonal topology.
/// </summary>
/// <param name="g">The geometry to reduce</param>
/// <param name="precModel">The precision model to use</param>
/// <returns>The reduced geometry</returns>
public static IGeometry Reduce(IGeometry g, IPrecisionModel precModel)
{
var reducer = new GeometryPrecisionReducer(precModel);
return reducer.Reduce(g);
}