public void TestML()
{
{
const double scale = 2.0E10;
var precisionModel = new PrecisionModel(scale);
var gs = new NtsGeometryServices(precisionModel, 0);
//var geometryFactory = gs.CreateGeometryFactory();
var reader = new WKTReader(gs);
var lineStringA = (LineString)
reader.Read("LINESTRING (-93.40178610435 -235.5437531975, -401.24229900825 403.69365857925)");
var lineStringB = (LineString)
reader.Read("LINESTRING (-50.0134121926 -145.44686640725, -357.8539250965 493.7905453695)");
var lineStringC = (LineString)
reader.Read("LINESTRING (-193.8964147753 -30.64653554935, -186.68866383205 -34.1176054623)");
var middlePoint = (Point)reader.Read("POINT (-203.93366864454998 174.171839481125)");
var lineStrings = new List <LineString>();
lineStrings.Add(lineStringA);
lineStrings.Add(lineStringB);
lineStrings.Add(lineStringC);
var noder = new GeometryNoder(precisionModel);
var nodedLineStrings = noder.Node(lineStrings.ToArray());
double shortestDistanceToPointBeforeNoding = double.MaxValue;
foreach (var lineString in lineStrings)
{
shortestDistanceToPointBeforeNoding = Math.Min(lineString.Distance(middlePoint),
shortestDistanceToPointBeforeNoding);
}
double shortestDistanceToPointAfterNoding = double.MaxValue;
foreach (var lineString in nodedLineStrings)
{
shortestDistanceToPointAfterNoding = Math.Min(lineString.Distance(middlePoint),
shortestDistanceToPointAfterNoding);
}
double difference = Math.Abs(shortestDistanceToPointAfterNoding - shortestDistanceToPointBeforeNoding);
TestContext.WriteLine("Scale: {0}", scale);
TestContext.WriteLine("Distance to point before noding: {0}", shortestDistanceToPointBeforeNoding);
TestContext.WriteLine("Distance to point after noding: {0}", shortestDistanceToPointAfterNoding);
TestContext.WriteLine("Difference is {0} and should be lesser than {1}", difference, 1.0 / scale);
const double roughTolerance = 10.0;
Assert.IsTrue(difference < roughTolerance, "this difference should should be lesser than " + 1.0 / scale);
}
}
public static Geometry NodeWithPointwisePrecision(Geometry geom, double scaleFactor)
{
var pm = new PrecisionModel(scaleFactor);
var roundedGeom = GeometryPrecisionReducer.Reduce(geom, pm);
var geomList = new List <Geometry>();
geomList.Add(roundedGeom);
var noder = new GeometryNoder(pm);
var lines = noder.Node(geomList);
return(Utility.FunctionsUtil.getFactoryOrDefault(geom).BuildGeometry(lines.Cast <Geometry>().ToList()));
}
public static IGeometry NodeWithPointwisePrecision(IGeometry geom, double scaleFactor)
{
var pm = new PrecisionModel(scaleFactor);
var roundedGeom = GeometryPrecisionReducer.Reduce(geom, pm);
var geomList = new List <IGeometry>();
geomList.Add(roundedGeom);
var noder = new GeometryNoder(pm);
var lines = noder.Node(geomList);
return(FunctionsUtil.getFactoryOrDefault(geom).BuildGeometry(CollectionUtil.Cast <IGeometry>((ICollection)lines)));
}
/// <summary>
/// Reduces precision pointwise, then snap-rounds.
/// Note that output set may not contain non-unique linework
/// (and thus cannot be used as input to Polygonizer directly).
/// UnaryUnion is one way to make the linework unique.
/// </summary>
/// <param name="geom">A geometry containing linework to node</param>
/// <param name="scaleFactor">the precision model scale factor to use</param>
/// <returns>The noded, snap-rounded linework</returns>
public static IGeometry SnapRoundWithPointwisePrecisionReduction(IGeometry geom, double scaleFactor)
{
var pm = new PrecisionModel(scaleFactor);
var roundedGeom = GeometryPrecisionReducer.ReducePointwise(geom, pm);
var geomList = new List <IGeometry>();
geomList.Add(roundedGeom);
var noder = new GeometryNoder(pm);
var lines = noder.Node(geomList);
return(FunctionsUtil.GetFactoryOrDefault(geom).BuildGeometry(lines.Cast <IGeometry>().ToArray()));
}
private void CheckRounding(string[] wkt)
{
var geoms = FromWKT(wkt);
var pm = new PrecisionModel(SnapTolerance);
var noder = new GeometryNoder(pm);
noder.IsValidityChecked = true;
var nodedLines = noder.Node(geoms);
foreach (var ls in nodedLines)
{
TestContext.WriteLine(ls);
}
Assert.IsTrue(IsSnapped(nodedLines, SnapTolerance));
}
/// <summary>
/// Creates a featureset from the given raster.
/// </summary>
/// <param name="rst">Raster used for creation.</param>
/// <param name="contourType">The contour type used for creation.</param>
/// <param name="fieldName">Name of the field that gets added to the featureset to put the level values into.</param>
/// <param name="levels">The levels to sort the features into.</param>
/// <returns>The featureset that was created from the raster.</returns>
public static FeatureSet Execute(Raster rst, ContourType contourType, string fieldName = "Value", double[] levels = null)
{
double[] lev = levels;
noData = rst.NoDataValue;
type = contourType;
Raster iRst = RasterCheck(rst, lev);
string field = fieldName ?? "Value";
double[] x = new double[rst.NumColumns];
double[] y = new double[rst.NumRows];
for (int i = 0; i < rst.NumColumns; i++)
{
x[i] = rst.Extent.MinX + (rst.CellWidth * i) + (rst.CellWidth / 2);
}
for (int i = 0; i < rst.NumRows; i++)
{
y[i] = rst.Extent.MaxY - (rst.CellHeight * i) - (rst.CellHeight / 2);
}
FeatureSet fs = null;
switch (type)
{
case ContourType.Line:
fs = new FeatureSet(FeatureType.Line);
fs.DataTable.Columns.Add(field, typeof(double));
if (levels != null)
{
for (int z = 0; z < levels.Length; z++)
{
IList <IGeometry> cont = GetContours(ref iRst, x, y, lev[z]);
foreach (var g in cont)
{
var f = (Feature)fs.AddFeature((ILineString)g);
f.DataRow[field] = lev[z];
}
}
}
break;
case ContourType.Polygon:
fs = new FeatureSet(FeatureType.Polygon);
fs.DataTable.Columns.Add("Lev", typeof(int));
fs.DataTable.Columns.Add("Label", typeof(string));
Collection <IGeometry> contours = new Collection <IGeometry>();
if (levels != null)
{
for (int z = 0; z < levels.Length; z++)
{
IList <IGeometry> cont = GetContours(ref iRst, x, y, lev[z]);
foreach (var g in cont)
{
contours.Add(new LineString(g.Coordinates));
}
}
Coordinate[] boundary = new Coordinate[5];
boundary[0] = new Coordinate(x[0], y[0]);
boundary[1] = new Coordinate(x[0], y[rst.NumRows - 1]);
boundary[2] = new Coordinate(x[rst.NumColumns - 1], y[rst.NumRows - 1]);
boundary[3] = new Coordinate(x[rst.NumColumns - 1], y[0]);
boundary[4] = new Coordinate(x[0], y[0]);
contours.Add(new LineString(boundary));
Collection <IGeometry> nodedContours = new Collection <IGeometry>();
IPrecisionModel pm = new PrecisionModel(1000d);
GeometryNoder geomNoder = new GeometryNoder(pm);
foreach (var c in geomNoder.Node(contours))
{
nodedContours.Add(c);
}
Polygonizer polygonizer = new Polygonizer();
polygonizer.Add(nodedContours);
foreach (IPolygon p in polygonizer.GetPolygons().OfType <IPolygon>())
{
IPoint pnt = p.InteriorPoint;
int c = (int)((pnt.X - iRst.Extent.MinX) / iRst.CellWidth);
int r = (int)((iRst.Extent.MaxY - pnt.Y) / iRst.CellHeight);
double z = iRst.Value[r, c];
int cls = GetLevel(z, lev);
string label = "Undefined";
if (cls == -1)
{
label = "< " + lev[0];
}
else if (cls == lev.Length)
{
label = "> " + lev[lev.Length - 1];
}
else if (cls >= 0 & cls < lev.Length)
{
label = lev[cls] + " - " + lev[cls + 1];
}
IFeature f = fs.AddFeature(p);
f.DataRow["Lev"] = cls;
f.DataRow["Label"] = label;
}
}
break;
}
return(fs);
}
public static DotSpatial.Data.FeatureSet Execute(DotSpatial.Data.Raster rst, ContourType contourType, string FieldName = "Value", double[] levels = null)
{
double[] lev = levels;
noData = rst.NoDataValue;
type = contourType;
DotSpatial.Data.Raster iRst = RasterCheck(rst, lev);;
string field;
if (FieldName == null)
{
field = "Value";
}
else
{
field = FieldName;
}
double[] x = new double[rst.NumColumns];
double[] y = new double[rst.NumRows];
for (int i = 0; i < rst.NumColumns; i++)
{
x[i] = rst.Extent.MinX + rst.CellWidth * i + rst.CellWidth / 2;
}
for (int i = 0; i < rst.NumRows; i++)
{
y[i] = rst.Extent.MaxY - rst.CellHeight * i - rst.CellHeight / 2;
}
DotSpatial.Data.FeatureSet fs = null;
switch (type)
{
case ContourType.Line:
{
fs = new DotSpatial.Data.FeatureSet(DotSpatial.Topology.FeatureType.Line);
fs.DataTable.Columns.Add(field, typeof(double));
for (int z = 0; z < levels.Length; z++)
{
IList <IGeometry> cont = GetContours(ref iRst, x, y, lev[z]);
foreach (var g in cont)
{
var f = (DotSpatial.Data.Feature)fs.AddFeature(ToDotSpatialLineString((ILineString)g));
f.DataRow[field] = lev[z];
}
}
}
break;
case ContourType.Polygon:
{
fs = new DotSpatial.Data.FeatureSet(DotSpatial.Topology.FeatureType.Polygon);
fs.DataTable.Columns.Add("Lev", typeof(int));
fs.DataTable.Columns.Add("Label", typeof(string));
Collection <IGeometry> Contours = new Collection <IGeometry>();
for (int z = 0; z < levels.Count(); z++)
{
IList <IGeometry> cont = GetContours(ref iRst, x, y, lev[z]);
foreach (var g in cont)
{
Contours.Add(new LineString(g.Coordinates));
}
}
Coordinate[] Boundary = new Coordinate[5];
Boundary[0] = new Coordinate(x[0], y[0]);
Boundary[1] = new Coordinate(x[0], y[rst.NumRows - 1]);
Boundary[2] = new Coordinate(x[rst.NumColumns - 1], y[rst.NumRows - 1]);
Boundary[3] = new Coordinate(x[rst.NumColumns - 1], y[0]);
Boundary[4] = new Coordinate(x[0], y[0]);
Contours.Add(new LineString(Boundary));
Collection <IGeometry> NodedContours = new Collection <IGeometry>();
GeometryNoder geomNoder = new GeometryNoder(new PrecisionModel(1000d));
foreach (var c in geomNoder.Node(Contours))
{
NodedContours.Add(c);
}
Polygonizer polygonizer = new Polygonizer();
polygonizer.Add(NodedContours);
foreach (IPolygon p in polygonizer.GetPolygons())
{
Point pnt = (Point)p.InteriorPoint;
int c = (int)((pnt.X - iRst.Extent.MinX) / iRst.CellWidth);
int r = (int)((iRst.Extent.MaxY - pnt.Y) / iRst.CellHeight);
double z = ((DotSpatial.Data.Raster)iRst).Value[r, c];
int Cls = GetLevel(z, lev);
string label = "Undefined";
if (Cls == -1)
{
label = "< " + lev[0].ToString();
}
if (Cls == lev.Count())
{
label = "> " + lev[lev.Count() - 1].ToString();
}
if (Cls >= 0 & Cls < lev.Count())
{
label = lev[Cls].ToString() + " - " + lev[Cls + 1].ToString();
}
DotSpatial.Topology.Polygon dsp = ToDotSpatialPolygon(p);
DotSpatial.Data.Feature f = (DotSpatial.Data.Feature)fs.AddFeature(dsp);
f.DataRow["Lev"] = Cls;
f.DataRow["Label"] = label;
}
}
break;
}
return(fs);
}