public static void DrawMultiPoint(IPointSymbolizer symbolizer, Graphics g, MultiPoint points, Map map)
{
symbolizer.Render(map, points, g);
}
/// <summary>
/// Transforms a <see cref="SharpMap.Geometries.MultiPoint"/>.
/// </summary>
/// <param name="points">MultiPoint to transform</param>
/// <param name="transform">MathTransform</param>
/// <returns>Transformed MultiPoint</returns>
public static MultiPoint TransformMultiPoint(MultiPoint points, IMathTransform transform)
{
MultiPoint pOut = new MultiPoint(points.Points.Count);
foreach (Point p in points.Points)
pOut.Points.Add(transform.Transform(p));
return pOut;
}
public static void DrawMultiPoint(Graphics g, MultiPoint points, Image symbol, float symbolscale, PointF offset,
float rotation, Map map)
{
for (int i = 0; i < points.Points.Count; i++)
DrawPoint(g, points.Points[i], symbol, symbolscale, offset, rotation, map);
}
/// <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"));
}
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>
/// Return a copy of this geometry
/// </summary>
/// <returns>Copy of Geometry</returns>
public new MultiPoint Clone()
{
MultiPoint geoms = new MultiPoint();
for (int i = 0; i < _Points.Count; i++)
geoms.Points.Add(_Points[i].Clone());
return geoms;
}
/// <summary>
/// Converts a MultiPoint to <MultiPoint Tagged Text>
/// format, then Appends it to the writer.
/// </summary>
/// <param name="multipoint">The MultiPoint to process.</param>
/// <param name="writer">The output writer to Append to.</param>
private static void AppendMultiPointTaggedText(MultiPoint multipoint, StringWriter writer)
{
writer.Write("MULTIPOINT ");
AppendMultiPointText(multipoint, writer);
}
/// <summary>
/// This method produces instances of type <see cref="SharpMap.Geometries.MultiPoint"/>.
/// </summary>
/// <returns>The created geometries</returns>
internal override Collection<Geometry> createGeometries()
{
MultiPoint multiPoint = null;
IPathNode multiPointNode = new PathNode(_GMLNS, "MultiPoint", (NameTable) _XmlReader.NameTable);
IPathNode pointMemberNode = new PathNode(_GMLNS, "pointMember", (NameTable) _XmlReader.NameTable);
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, multiPointNode, pointMemberNode)) !=
null)
{
multiPoint = new MultiPoint();
GeometryFactory geomFactory = new PointFactory(_GeomReader, _FeatureTypeInfo);
Collection<Geometry> points = geomFactory.createGeometries();
foreach (Point point in points)
multiPoint.Points.Add(point);
_Geoms.Add(multiPoint);
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-point geometry: " + ex.Message);
throw ex;
}
return _Geoms;
}
private static Geometry FromShapeFileMultiPoint(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 == 8 || type == 18 || type == 28))
throw new InvalidOperationException();
box = new BoundingBox(reader.ReadDouble(), reader.ReadDouble(), reader.ReadDouble(), reader.ReadDouble());
var numPoints = reader.ReadInt32();
var res = new MultiPoint();
var points = res.Points;
for (var i = 0; i < numPoints; i++)
{
var vertex = hasZ
? new Point3D(reader.ReadDouble(), reader.ReadDouble(), double.NaN)
: new Point(reader.ReadDouble(), reader.ReadDouble());
points.Add(vertex);
}
if (hasZ)
{
var minZ = reader.ReadDouble();
var maxZ = reader.ReadDouble();
for (var i = 0; i < numPoints; i++)
((Point3D)points[i]).Z = reader.ReadDouble();
}
if (res.NumGeometries == 1)
return points[0];
return res;
}
}
/// <summary>
/// Converts a MultiPoint to <MultiPoint Tagged Text>
/// format, then Appends it to the writer.
/// </summary>
/// <param name="multipoint">The MultiPoint to process.</param>
/// <param name="writer">The output writer to Append to.</param>
private static void AppendMultiPointTaggedText(MultiPoint multipoint, StringWriter writer)
{
//{
// "type": "MultiPoint",
// "coordinates": [
// [100.0, 0.0], [101.0, 1.0]
// ]
//}
writer.WriteLine("{");
writer.WriteLine("\"type\": \"MultiPoint\",");
writer.WriteLine("\"coordinates\": ");
AppendMultiPointText(multipoint, writer);
writer.WriteLine("}");
}
/// <summary>
/// Transforms a <see cref="SharpMap.Geometries.MultiPoint"/>.
/// </summary>
/// <param name="points">MultiPoint to transform</param>
/// <param name="from">Source Projection</param>
/// <param name="to">Target Projection</param>
/// <returns>Transformed MultiPoint</returns>
public static MultiPoint TransformMultiPoint(MultiPoint points, ProjectionInfo from, ProjectionInfo to)
{
var pts = new List<double[]>();
for (var i = 0; i < points.NumGeometries; i++)
pts.Add(new[] {points[i].X, points[i].Y});
return new MultiPoint(TransformList(pts, from, to));
}
/// <summary>
/// Method to render the <see cref="MultiPoint"/> to the <see cref="Graphics"/> object.
/// </summary>
/// <param name="map">The map object</param>
/// <param name="points">Locations where to render the Symbol</param>
/// <param name="g">The graphics object to use.</param>
public void Render(Map map, MultiPoint points, Graphics g)
{
if (points == null)
return;
foreach (Point point in points)
Render(map, point, g);
}
/// <summary>
/// Writes a multipoint.
/// </summary>
/// <param name="mp">The multipoint to be written.</param>
/// <param name="bWriter">Stream to write to.</param>
/// <param name="byteorder">Byte order</param>
private static void WriteMultiPoint(MultiPoint mp, BinaryWriter bWriter, WkbByteOrder byteorder)
{
//Write the number of points.
WriteUInt32((uint)mp.Points.Count, bWriter, byteorder);
//Loop on the number of points.
foreach (Point p in mp.Points)
{
//Write Points Header
bWriter.Write((byte)byteorder);
WriteUInt32((uint)WKBGeometryType.wkbPoint, bWriter, byteorder);
//Write each point.
WritePoint((Point)p, 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();
}
public static void DrawMultiPoint(Graphics g, MultiPoint points, Brush brush, float size, PointF offset, Map map)
{
for (int i = 0; i < points.Points.Count; i++)
DrawPoint(g, points.Points[i], brush, size, offset, map);
}
private static Geometry ToSharpMapMultiPoint(EsriShapeBuffer shapeBuffer)
{
var multiPointShapeBuffer = shapeBuffer as EsriMultiPointShapeBuffer;
if (multiPointShapeBuffer == null)
{
BoundingBox box;
return FromShapeFileMultiPoint(shapeBuffer, out box);
}
var res = new MultiPoint();
var hasZ = EsriShapeBuffer.HasZs(multiPointShapeBuffer.shapeType);
var points = res.Points;
var offset = 0;
foreach (var point in multiPointShapeBuffer.Points)
points.Add(hasZ
? new Point3D(point.x, point.y, multiPointShapeBuffer.Zs[offset++])
: new Point(point.x, point.y));
return res;
}
/// <summary>
/// Creates a Point 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 <Point Text>.</param>
/// <returns>Returns a Point specified by the next token in
/// the stream.</returns>
/// <remarks>
/// ParseException is thrown if an unexpected token is encountered.
/// </remarks>
private static MultiPoint ReadMultiPointText(WktStreamTokenizer tokenizer)
{
SharpMap.Geometries.MultiPoint mp = new MultiPoint();
string nextToken = GetNextEmptyOrOpener(tokenizer);
if (nextToken == "EMPTY")
return mp;
mp.Points.Add(new SharpMap.Geometries.Point(GetNextNumber(tokenizer),GetNextNumber(tokenizer)));
nextToken = GetNextCloserOrComma(tokenizer);
while (nextToken == ",")
{
mp.Points.Add(new SharpMap.Geometries.Point(GetNextNumber(tokenizer), GetNextNumber(tokenizer)));
nextToken = GetNextCloserOrComma(tokenizer);
}
return mp;
}
/// <summary>
/// Transforms a <see cref="SharpMap.Geometries.MultiPoint"/>.
/// </summary>
/// <param name="points">MultiPoint to transform</param>
/// <param name="transform">MathTransform</param>
/// <returns>Transformed MultiPoint</returns>
public static MultiPoint TransformMultiPoint(MultiPoint points, IMathTransform transform)
{
MultiPoint pOut = new MultiPoint();
pOut.Points = transform.TransformList(points.Points);
return pOut;
}
private static MultiPoint CreateWKBMultiPoint(BinaryReader reader, WkbByteOrder byteOrder)
{
// Get the number of points in this multipoint.
int numPoints = (int) ReadUInt32(reader, byteOrder);
// Create a new array for the points.
MultiPoint points = new MultiPoint();
// Loop on the number of points.
for (int i = 0; i < numPoints; i++)
{
// Read point header
reader.ReadByte();
ReadUInt32(reader, byteOrder);
// TODO: Validate type
// Create the next point and add it to the point array.
points.Points.Add(CreateWKBPoint(reader, byteOrder));
}
return points;
}
/// <summary>
/// Transforms a <see cref="SharpMap.Geometries.MultiPoint"/>.
/// </summary>
/// <param name="points">MultiPoint to transform</param>
/// <param name="transform">MathTransform</param>
/// <returns>Transformed MultiPoint</returns>
public static MultiPoint TransformMultiPoint(MultiPoint points, IMathTransform transform)
{
List<double[]> pts = new List<double[]>();
for (int i = 0; i < points.NumGeometries; i++)
pts.Add(new double[2] {points[i].X, points[i].Y});
return new MultiPoint(transform.TransformList(pts));
}
/// <summary>
/// Converts a MultiPoint to <MultiPoint Text> format, then
/// Appends it to the writer.
/// </summary>
/// <param name="multiPoint">The MultiPoint to process.</param>
/// <param name="writer">The output stream writer to Append to.</param>
private static void AppendMultiPointText(MultiPoint multiPoint, StringWriter writer)
{
if (multiPoint == null || multiPoint.IsEmpty())
writer.Write("EMPTY");
else
{
writer.Write("(");
for (int i = 0; i < multiPoint.Points.Count; i++)
{
if (i > 0)
writer.Write(", ");
AppendCoordinate(multiPoint[i], writer);
}
writer.Write(")");
}
}
/// <summary>
/// Creates a Point 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 <Point Text>.
/// </param>
/// <returns>
/// Returns a Point specified by the next token in
/// the stream.
/// </returns>
/// <exception cref="ParseException">
/// Thrown if an unexpected token is encountered.
/// </exception>
private static MultiPoint readMultiPointText(WktStreamTokenizer tokenizer)
{
MultiPoint mp = new MultiPoint();
string nextToken = getNextEmptyOrOpener(tokenizer);
if (nextToken == "EMPTY")
{
return mp;
}
mp.Points.Add(new Point(getNextNumber(tokenizer), getNextNumber(tokenizer)));
nextToken = getNextCloserOrComma(tokenizer);
while (nextToken == ",")
{
mp.Points.Add(new Point(getNextNumber(tokenizer), getNextNumber(tokenizer)));
nextToken = getNextCloserOrComma(tokenizer);
}
return mp;
}
