public void MultiLinestring()
{
MultiLineString mls = new MultiLineString();
Assert.IsTrue(mls.IsEmpty());
mls.LineStrings.Add(new LineString());
Assert.IsTrue(mls.IsEmpty());
mls.LineStrings[0].Vertices.Add(new Point(45, 68));
mls.LineStrings[0].Vertices.Add(new Point(82, 44));
mls.LineStrings.Add(CreateLineString());
foreach (LineString ls in mls)
Assert.IsFalse(ls.IsEmpty());
Assert.IsFalse(mls.IsEmpty());
foreach (LineString ls in mls)
Assert.IsFalse(ls.IsClosed);
Assert.IsFalse(mls.IsClosed);
//Close linestrings
foreach (LineString ls in mls)
ls.Vertices.Add(ls.StartPoint.Clone());
foreach (LineString ls in mls)
Assert.IsTrue(ls.IsClosed);
Assert.IsTrue(mls.IsClosed);
Assert.AreEqual(new BoundingBox(1,2,930,123), mls.GetBoundingBox());
}
public static void DrawMultiLineString(Graphics g, MultiLineString lines, Pen pen, Map map, float offset)
{
for (int i = 0; i < lines.LineStrings.Count; i++)
DrawLineString(g, lines.LineStrings[i], pen, map, offset);
}
public void EndFigure()
{
GeometryType type = _CurrentType.Peek();
switch (type)
{
case GeometryType.GeometryCollection:
{
var g = new SmGeometries.GeometryCollection();
g.Collection = _Figures;
_Figures = new SmGeometries.Geometry[] { g };
}
break;
case GeometryType.LineString:
_Figures.Add(new SmGeometries.LineString(_CurrentPoints));
break;
case GeometryType.MultiLineString:
{
var g = new SmGeometries.MultiLineString();
g.LineStrings = _Figures.Cast <SmGeometries.LineString>().ToList <SmGeometries.LineString>();
_Figures = new SmGeometries.Geometry[] { g };
}
break;
case GeometryType.MultiPoint:
{
var g = new SmGeometries.MultiPoint();
g.Points = _Figures.Cast <SmGeometries.Point>().ToList <SmGeometries.Point>();
_Figures = new SmGeometries.Geometry[] { g };
}
break;
case GeometryType.MultiPolygon:
{
var g = new SmGeometries.MultiPolygon();
g.Polygons = _Figures.Cast <SmGeometries.Polygon>().ToList <SmGeometries.Polygon>();
_Figures = new SmGeometries.Geometry[] { g };
}
break;
case GeometryType.Point:
if (_CurrentPoints.Count > 0)
{
_Figures.Add(_CurrentPoints[0]);
}
else
{
_Figures.Add(new SmGeometries.Point());
}
break;
case GeometryType.Polygon:
_Figures.Add(new SmGeometries.LinearRing(_CurrentPoints));
break;
default:
throw new NotSupportedException(
string.Format(
CultureInfo.CurrentCulture,
SR.UnsupportedGeometryTypeException,
type
)
);
}
_CurrentPoints.Clear();
}
/// <summary>
/// Transforms a <see cref="SharpMap.Geometries.MultiLineString"/>.
/// </summary>
/// <param name="lines">MultiLineString to transform</param>
/// <param name="transform">MathTransform</param>
/// <returns>Transformed MultiLineString</returns>
public static MultiLineString TransformMultiLineString(MultiLineString lines, IMathTransform transform)
{
MultiLineString lOut = new MultiLineString(lines.LineStrings.Count);
foreach (LineString l in lines)
lOut.LineStrings.Add(TransformLineString(l, transform));
return lOut;
}
/// <summary>
/// Reads and parses the geometry with ID 'oid' from the ShapeFile
/// </summary>
/// <remarks><see cref="FilterDelegate">Filtering</see> is not applied to this method</remarks>
/// <param name="oid">Object ID</param>
/// <returns>geometry</returns>
private Geometry ReadGeometry(uint oid)
{
brShapeFile.BaseStream.Seek(GetShapeIndex(oid) + 8, 0); //Skip record number and content length
ShapeType type = (ShapeType) brShapeFile.ReadInt32(); //Shape type
if (type == ShapeType.Null)
return null;
if (_ShapeType == ShapeType.Point || _ShapeType == ShapeType.PointM || _ShapeType == ShapeType.PointZ)
{
Point tempFeature = new Point();
return new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble());
}
else if (_ShapeType == ShapeType.Multipoint || _ShapeType == ShapeType.MultiPointM ||
_ShapeType == ShapeType.MultiPointZ)
{
brShapeFile.BaseStream.Seek(32 + brShapeFile.BaseStream.Position, 0); //skip min/max box
MultiPoint feature = new MultiPoint();
int nPoints = brShapeFile.ReadInt32(); // get the number of points
if (nPoints == 0)
return null;
for (int i = 0; i < nPoints; i++)
feature.Points.Add(new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble()));
return feature;
}
else if (_ShapeType == ShapeType.PolyLine || _ShapeType == ShapeType.Polygon ||
_ShapeType == ShapeType.PolyLineM || _ShapeType == ShapeType.PolygonM ||
_ShapeType == ShapeType.PolyLineZ || _ShapeType == ShapeType.PolygonZ)
{
brShapeFile.BaseStream.Seek(32 + brShapeFile.BaseStream.Position, 0); //skip min/max box
int nParts = brShapeFile.ReadInt32(); // get number of parts (segments)
if (nParts == 0)
return null;
int nPoints = brShapeFile.ReadInt32(); // get number of points
int[] segments = new int[nParts + 1];
//Read in the segment indexes
for (int b = 0; b < nParts; b++)
segments[b] = brShapeFile.ReadInt32();
//add end point
segments[nParts] = nPoints;
if ((int) _ShapeType%10 == 3)
{
MultiLineString mline = new MultiLineString();
for (int LineID = 0; LineID < nParts; LineID++)
{
LineString line = new LineString();
for (int i = segments[LineID]; i < segments[LineID + 1]; i++)
line.Vertices.Add(new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble()));
mline.LineStrings.Add(line);
}
if (mline.LineStrings.Count == 1)
return mline[0];
return mline;
}
else //(_ShapeType == ShapeType.Polygon etc...)
{
//First read all the rings
List<LinearRing> rings = new List<LinearRing>();
for (int RingID = 0; RingID < nParts; RingID++)
{
LinearRing ring = new LinearRing();
for (int i = segments[RingID]; i < segments[RingID + 1]; i++)
ring.Vertices.Add(new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble()));
rings.Add(ring);
}
bool[] IsCounterClockWise = new bool[rings.Count];
int PolygonCount = 0;
for (int i = 0; i < rings.Count; i++)
{
IsCounterClockWise[i] = rings[i].IsCCW();
if (!IsCounterClockWise[i])
PolygonCount++;
}
if (PolygonCount == 1) //We only have one polygon
{
Polygon poly = new Polygon();
poly.ExteriorRing = rings[0];
if (rings.Count > 1)
for (int i = 1; i < rings.Count; i++)
poly.InteriorRings.Add(rings[i]);
return poly;
}
else
{
MultiPolygon mpoly = new MultiPolygon();
Polygon poly = new Polygon();
poly.ExteriorRing = rings[0];
for (int i = 1; i < rings.Count; i++)
{
if (!IsCounterClockWise[i])
{
mpoly.Polygons.Add(poly);
poly = new Polygon(rings[i]);
}
else
poly.InteriorRings.Add(rings[i]);
}
mpoly.Polygons.Add(poly);
return mpoly;
}
}
}
else
throw (new ApplicationException("Shapefile type " + _ShapeType.ToString() + " not supported"));
}
/// <summary>
/// Transforms a <see cref="SharpMap.Geometries.MultiLineString"/>.
/// </summary>
/// <param name="lines">MultiLineString to transform</param>
/// <param name="transform">MathTransform</param>
/// <returns>Transformed MultiLineString</returns>
public static MultiLineString TransformMultiLineString(MultiLineString lines, IMathTransform transform)
{
MultiLineString lOut = new MultiLineString();
//lOut.LineStrings = new Collection<LineString>(lines.LineStrings.Count); //Pre-inialize array size for better performance
lOut.LineStrings = new Collection<LineString>(); //Pre-inialize array size for better performance
for (int i = 0; i < lines.LineStrings.Count; i++)
lOut.LineStrings.Add(TransformLineString(lines[i], transform));
return lOut;
}
/// <summary>
/// This method produces instances of type <see cref="SharpMap.Geometries.MultiLineString"/>.
/// </summary>
/// <returns>The created geometries</returns>
internal override Collection<Geometry> createGeometries()
{
MultiLineString multiLineString = null;
IPathNode multiLineStringNode = new PathNode(_GMLNS, "MultiLineString", (NameTable) _XmlReader.NameTable);
IPathNode multiCurveNode = new PathNode(_GMLNS, "MultiCurve", (NameTable) _XmlReader.NameTable);
IPathNode multiLineStringNodeAlt = new AlternativePathNodesCollection(multiLineStringNode, multiCurveNode);
IPathNode lineStringMemberNode = new PathNode(_GMLNS, "lineStringMember", (NameTable) _XmlReader.NameTable);
IPathNode curveMemberNode = new PathNode(_GMLNS, "curveMember", (NameTable) _XmlReader.NameTable);
IPathNode lineStringMemberNodeAlt = new AlternativePathNodesCollection(lineStringMemberNode, curveMemberNode);
string[] labelValue = new string[1];
bool geomFound = false;
try
{
// Reading the entire feature's node makes it possible to collect label values that may appear before or after the geometry property
while ((_FeatureReader = GetSubReaderOf(_XmlReader, null, _FeatureNode)) != null)
{
while (
(_GeomReader =
GetSubReaderOf(_FeatureReader, labelValue, multiLineStringNodeAlt, lineStringMemberNodeAlt)) !=
null)
{
multiLineString = new MultiLineString();
GeometryFactory geomFactory = new LineStringFactory(_GeomReader, _FeatureTypeInfo);
Collection<Geometry> lineStrings = geomFactory.createGeometries();
foreach (LineString lineString in lineStrings)
multiLineString.LineStrings.Add(lineString);
_Geoms.Add(multiLineString);
geomFound = true;
}
if (geomFound) AddLabel(labelValue[0], _Geoms[_Geoms.Count - 1]);
geomFound = false;
}
}
catch (Exception ex)
{
Trace.TraceError("An exception occured while parsing a multi-lineString geometry: " + ex.Message);
throw ex;
}
return _Geoms;
}
/// <summary>
/// Converts a MultiLineString to <MultiLineString Tagged
/// Text> format, then Appends it to the writer.
/// </summary>
/// <param name="multiLineString">The MultiLineString to process</param>
/// <param name="writer">The output stream writer to Append to.</param>
private static void AppendMultiLineStringTaggedText(MultiLineString multiLineString, StringWriter writer)
{
writer.Write("MULTILINESTRING ");
AppendMultiLineStringText(multiLineString, writer);
}
/// <summary>
/// Transforms a <see cref="SharpMap.Geometries.MultiLineString"/>.
/// </summary>
/// <param name="lines">MultiLineString to transform</param>
/// <param name="from">Source Projection</param>
/// <param name="to">Target Projection</param>
/// <returns>Transformed MultiLineString</returns>
public static MultiLineString TransformMultiLineString(MultiLineString lines, ProjectionInfo from, ProjectionInfo to)
{
var lOut = new MultiLineString {LineStrings = new Collection<LineString>()};
for (var i = 0; i < lines.LineStrings.Count; i++)
lOut.LineStrings.Add(TransformLineString(lines[i], from, to));
return lOut;
}
/// <summary>
/// Return a copy of this geometry
/// </summary>
/// <returns>Copy of Geometry</returns>
public new MultiLineString Clone()
{
MultiLineString geoms = new MultiLineString();
for (int i = 0; i < _LineStrings.Count; i++)
geoms.LineStrings.Add(_LineStrings[i].Clone());
return geoms;
}
/// <summary>
/// Converts a MultiLineString to <MultiLineString Tagged
/// Text> format, then Appends it to the writer.
/// </summary>
/// <param name="multiLineString">The MultiLineString to process</param>
/// <param name="writer">The output stream writer to Append to.</param>
private static void AppendMultiLineStringTaggedText(MultiLineString multiLineString, StringWriter writer)
{
//{
// "type": "MultiLineString",
// "coordinates": [
// [ [100.0, 0.0], [101.0, 1.0] ],
// [ [102.0, 2.0], [103.0, 3.0] ]
// ]
//}
writer.WriteLine("{");
writer.WriteLine("\"type\": \"MultiLineString\",");
writer.WriteLine("\"coordinates\": ");
AppendMultiLineStringText(multiLineString, writer);
writer.WriteLine("}");
}
/// <summary>
/// Writes a multilinestring.
/// </summary>
/// <param name="mls">The multilinestring to be written.</param>
/// <param name="bWriter">Stream to write to.</param>
/// <param name="byteorder">Byte order</param>
private static void WriteMultiLineString(MultiLineString mls, BinaryWriter bWriter, WkbByteOrder byteorder)
{
//Write the number of linestrings.
WriteUInt32((uint)mls.LineStrings.Count, bWriter, byteorder);
//Loop on the number of linestrings.
foreach (LineString ls in mls.LineStrings)
{
//Write LineString Header
bWriter.Write((byte)byteorder);
WriteUInt32((uint)WKBGeometryType.wkbLineString, bWriter, byteorder);
//Write each linestring.
WriteLineString(ls, bWriter, byteorder);
}
}
public void EndFigure()
{
GeometryType type=_CurrentType.Peek();
switch (type)
{
case GeometryType.GeometryCollection:
{
var g=new SmGeometries.GeometryCollection();
g.Collection=_Figures;
_Figures=new SmGeometries.Geometry[] { g };
}
break;
case GeometryType.LineString:
_Figures.Add(new SmGeometries.LineString(_CurrentPoints));
break;
case GeometryType.MultiLineString:
{
var g=new SmGeometries.MultiLineString();
g.LineStrings=_Figures.Cast<SmGeometries.LineString>().ToList<SmGeometries.LineString>();
_Figures=new SmGeometries.Geometry[] { g };
}
break;
case GeometryType.MultiPoint:
{
var g=new SmGeometries.MultiPoint();
g.Points=_Figures.Cast<SmGeometries.Point>().ToList<SmGeometries.Point>();
_Figures=new SmGeometries.Geometry[] { g };
}
break;
case GeometryType.MultiPolygon:
{
var g=new SmGeometries.MultiPolygon();
g.Polygons=_Figures.Cast<SmGeometries.Polygon>().ToList<SmGeometries.Polygon>();
_Figures=new SmGeometries.Geometry[] { g };
}
break;
case GeometryType.Point:
if (_CurrentPoints.Count>0)
_Figures.Add(_CurrentPoints[0]);
else
_Figures.Add(new SmGeometries.Point());
break;
case GeometryType.Polygon:
_Figures.Add(new SmGeometries.LinearRing(_CurrentPoints));
break;
default:
throw new NotSupportedException(
string.Format(
CultureInfo.CurrentCulture,
SR.UnsupportedGeometryTypeException,
type
)
);
}
_CurrentPoints.Clear();
}
/// <summary>
/// Creates a <see cref="MultiLineString"/> using the next token in the stream.
/// </summary>
/// <param name="tokenizer">tokenizer over a stream of text in Well-known Text format. The next tokens must form a MultiLineString Text</param>
/// <returns>a <see cref="MultiLineString"/> specified by the next token in the stream</returns>
private static MultiLineString ReadMultiLineStringText(WktStreamTokenizer tokenizer)
{
MultiLineString lines = new MultiLineString();
string nextToken = GetNextEmptyOrOpener(tokenizer);
if (nextToken == "EMPTY")
return lines;
lines.LineStrings.Add(ReadLineStringText(tokenizer));
nextToken = GetNextCloserOrComma(tokenizer);
while (nextToken == ",")
{
lines.LineStrings.Add(ReadLineStringText(tokenizer));
nextToken = GetNextCloserOrComma(tokenizer);
}
return lines;
}
private static Geometry FromShapeFilePolyLine(EsriShapeBuffer shapeBuffer, out BoundingBox box)
{
box = null;
if (shapeBuffer == null)
return null;
var hasZ = EsriShapeBuffer.HasZs(shapeBuffer.shapeType);
var hasM = EsriShapeBuffer.HasMs(shapeBuffer.shapeType);
using (var reader = new BinaryReader(new MemoryStream(shapeBuffer.shapeBuffer)))
{
var type = reader.ReadInt32();
if (!(type == 3 || type == 13 || type == 23))
throw new InvalidOperationException();
box = new BoundingBox(reader.ReadDouble(), reader.ReadDouble(), reader.ReadDouble(), reader.ReadDouble());
var numParts = reader.ReadInt32();
var numPoints = reader.ReadInt32();
var allVertices = new List<Point>(numPoints);
var parts = new int[numParts+1];
for (var i = 0; i < numParts; i++)
parts[i] = reader.ReadInt32();
parts[numParts] = numPoints;
var res = new MultiLineString();
var lines = res.LineStrings;
for (var i = 0; i < numParts; i++)
{
var count = parts[i + 1] - parts[i];
var vertices = new List<Point>(count);
for (var j = 0; j < count; j++)
{
var vertex = hasZ
? new Point3D(reader.ReadDouble(), reader.ReadDouble(), double.NaN)
: new Point(reader.ReadDouble(), reader.ReadDouble());
vertices.Add(vertex);
allVertices.Add(vertex);
}
lines.Add(new LineString(vertices));
}
if (hasZ)
{
var minZ = reader.ReadDouble();
var maxZ = reader.ReadDouble();
for (var i = 0; i < numPoints; i++)
((Point3D) allVertices[i]).Z = reader.ReadDouble();
}
if (res.NumGeometries == 1)
return lines[0];
return res;
}
}
private static MultiLineString CreateWKBMultiLineString(BinaryReader reader, WkbByteOrder byteOrder)
{
// Get the number of linestrings in this multilinestring.
int numLineStrings = (int) ReadUInt32(reader, byteOrder);
// Create a new array for the linestrings .
MultiLineString mline = new MultiLineString();
// Loop on the number of linestrings.
for (int i = 0; i < numLineStrings; i++)
{
// Read linestring header
reader.ReadByte();
ReadUInt32(reader, byteOrder);
// Create the next linestring and add it to the array.
mline.LineStrings.Add(CreateWKBLineString(reader, byteOrder));
}
// Create and return the MultiLineString.
return mline;
}
private static Geometry ToSharpMapMultiLineString(EsriShapeBuffer shapeBuffer)
{
if (shapeBuffer == null)
return null;
var multiPartShapeBuffer = shapeBuffer as EsriMultiPartShapeBuffer;
if (multiPartShapeBuffer == null)
{
BoundingBox box;
return FromShapeFilePolyLine(shapeBuffer, out box);
}
var hasZ = EsriShapeBuffer.HasZs(shapeBuffer.shapeType);
var res = new MultiLineString();
var lines = res.LineStrings;
var offset = 0;
for (var i = 0; i < multiPartShapeBuffer.NumParts; i++)
{
var vertices = new List<Point>(multiPartShapeBuffer.Parts[i]);
for (var j = 0; j < multiPartShapeBuffer.Parts[i]; j++ )
{
var index = offset + j;
var point = multiPartShapeBuffer.Points[index];
vertices.Add(hasZ
? new Point3D(point.x, point.y, multiPartShapeBuffer.Zs[index])
: new Point(point.x, point.y));
}
lines.Add(new LineString(vertices));
offset += multiPartShapeBuffer.Parts[i];
}
if (lines.Count == 1)
return lines[0];
return res;
}
/// <summary>
/// Converts a MultiLineString to <MultiLineString Text>
/// format, then Appends it to the writer.
/// </summary>
/// <param name="multiLineString">The MultiLineString to process.</param>
/// <param name="writer">The output stream writer to Append to.</param>
private static void AppendMultiLineStringText(MultiLineString multiLineString, StringWriter writer)
{
if (multiLineString == null || multiLineString.IsEmpty())
writer.Write("EMPTY");
else
{
writer.Write("(");
for (int i = 0; i < multiLineString.LineStrings.Count; i++)
{
if (i > 0)
writer.Write(", ");
AppendLineStringText(multiLineString[i], writer);
}
writer.Write(")");
}
}
/// <summary>
///
/// </summary>
/// <param name="lineStrings"></param>
/// <returns></returns>
public MultiLineString ClipLineString(MultiLineString lineStrings)
{
var clippedLineStrings = new List<LineString>();
foreach (LineString s in lineStrings)
clippedLineStrings.AddRange(ClipLineString(s).LineStrings);
return new MultiLineString { LineStrings = clippedLineStrings };
}
