private static bool IsSameStructureCollection(GeometryCollection g1, GeometryCollection g2)
{
if (g1.NumGeometries != g2.NumGeometries)
return false;
for (int i = 0; i < g1.NumGeometries; i++)
{
if (!IsSameStructure(g1.GetGeometryN(i), g2.GetGeometryN(i)))
return false;
}
return true;
}
public static List<IGeometry> Project(List<IGeometry> toList, ProjectionInfo pStart, ProjectionInfo pEnd)
{
var geometryCollection = new GeometryCollection(toList.ToArray());
var collection = geometryCollection.ToDotSpatial();
var featureSet = new FeatureSet();
foreach (var geo in collection.Geometries)
{
featureSet.Features.Add(geo);
}
featureSet.Projection = pStart;
featureSet.Reproject(pEnd);
var dotSpatialProjectedGeos =
featureSet.Features.Select(x => x.BasicGeometry as DotSpatial.Topology.IGeometry).ToList();
var result =
dotSpatialProjectedGeos.Select(
dotSpatialProjectedGeo => GeometryConverter.ToGeoAPI((dotSpatialProjectedGeo)))
.ToList();
return result;
}
/// <summary>
/// Creates a <see cref="GeometryCollection"/> 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 GeometryCollection Text.</param>
/// <returns>
/// A <see cref="GeometryCollection"/> specified by the next token in the stream.</returns>
private static GeometryCollection ReadGeometryCollectionText(WktStreamTokenizer tokenizer)
{
var arrgeometries = new List<IGeometry>();
string nextToken = GetNextEmptyOrOpener(tokenizer);
if (nextToken.Equals("EMPTY"))
return new GeometryCollection(arrgeometries.ToArray());
arrgeometries.Add(ReadGeometryTaggedText(tokenizer));
nextToken = GetNextCloserOrComma(tokenizer);
while (nextToken.Equals(","))
{
arrgeometries.Add(ReadGeometryTaggedText(tokenizer));
nextToken = GetNextCloserOrComma(tokenizer);
}
GeometryCollection geometries = new GeometryCollection(arrgeometries.ToArray());
return geometries;
}
private static Geometry CreateWKBGeometryCollection(BinaryReader reader, WkbByteOrder byteOrder)
{
// The next byte in the array tells the number of geometries in this collection.
int numGeometries = (int) ReadUInt32(reader, byteOrder);
var geometriesArray = new IGeometry[numGeometries];
// Loop on the number of geometries.
for (int i = 0; i < numGeometries; i++)
{
// Call the main create function with the next geometry.
geometriesArray[i] = Parse(reader);
}
// Create a new array for the geometries.
GeometryCollection geometries = new GeometryCollection(geometriesArray);
// Create and return the next geometry.
return geometries;
}
public void TestWriteSimpleShapeFile()
{
var p1 = Factory.CreatePoint(new Coordinate(100, 100));
var p2 = Factory.CreatePoint(new Coordinate(200, 200));
var coll = new GeometryCollection(new IGeometry[] { p1, p2, });
ShapefileWriter.WriteGeometryCollection(@"test_arcview", coll);
// Not read by ArcView!!!
}
public static string ToGeoJson(IEnumerable<System.Data.Entity.Spatial.DbGeometry> dbGeometrys,
ProjectionInfo pStart)
{
var pEnd = Definitions.WorldProjection;
var enumerable = dbGeometrys as IList<System.Data.Entity.Spatial.DbGeometry> ?? dbGeometrys.ToList();
var reader = new WKTReader();
var geometryCollection =
new GeometryCollection(
enumerable.Select(x => GeometryHelper.Project(x.MakeValid(), pStart, pEnd))
.Select(dbGeometry => reader.Read(dbGeometry.WellKnownValue.WellKnownText))
.ToArray());
var geoJsonWriter = new GeoJsonWriter();
return geoJsonWriter.Write(geometryCollection);
}
/// <summary>
/// geoJson should be feature or featureCollection. convert and project geoJson to DbGeometry
/// </summary>
/// <param name="geoJson"></param>
/// <param name="pStart"></param>
/// <param name="pEnd"></param>
/// <returns></returns>
public static System.Data.Entity.Spatial.DbGeometry ToGeometry(string geoJson, ProjectionInfo pStart,
ProjectionInfo pEnd)
{
var featureCollection = FeatureCollection(geoJson);
var geometries =
Project(featureCollection.Features.Select(feature => feature.Geometry).ToList(), pStart, pEnd);
var wktWriter = new WKTWriter();
var geoemetryColleciton = new GeometryCollection(geometries.ToArray());
var wkt = wktWriter.Write(geoemetryColleciton);
var geometry = System.Data.Entity.Spatial.DbGeometry.FromText(wkt);
return geometry;
}
/// <summary>
/// Writes a geometrycollection.
/// </summary>
/// <param name="gc">The geometrycollection to be written.</param>
/// <param name="bWriter">Stream to write to.</param>
/// <param name="byteorder">Byte order</param>
private static void WriteGeometryCollection(GeometryCollection gc, BinaryWriter bWriter, WkbByteOrder byteorder)
{
//Get the number of geometries in this geometrycollection.
int numGeometries = gc.NumGeometries;
//Write the number of geometries.
WriteUInt32((uint) numGeometries, bWriter, byteorder);
//Loop on the number of geometries.
for (int i = 0; i < numGeometries; i++)
{
//Write the byte-order format of the following geometry.
bWriter.Write((byte) byteorder);
//Write the type of each geometry.
WriteType(gc[i] as Geometry, bWriter, byteorder);
//Write each geometry.
WriteGeometry(gc[i] as Geometry, bWriter, byteorder);
}
}
/// <summary>
/// Converts a GeometryCollection to <GeometryCollection Text > format, then Appends it to the writer.
/// </summary>
/// <param name="geometryCollection">The GeometryCollection to process.</param>
/// <param name="writer">The output stream writer to Append to.</param>
private static void AppendGeometryCollectionText(GeometryCollection geometryCollection, StringWriter writer)
{
if (geometryCollection == null || geometryCollection.IsEmpty)
writer.Write("EMPTY");
else
{
writer.Write("(");
for (int i = 0; i < geometryCollection.Length; i++)
{
if (i > 0)
writer.Write(", ");
AppendGeometryTaggedText(geometryCollection[i], writer);
}
writer.Write(")");
}
}
/// <summary>
/// Converts a GeometryCollection to <GeometryCollection Tagged
/// Text> format, then Appends it to the writer.
/// </summary>
/// <param name="geometryCollection">The GeometryCollection to process</param>
/// <param name="writer">The output stream writer to Append to.</param>
private static void AppendGeometryCollectionTaggedText(GeometryCollection geometryCollection,
StringWriter writer)
{
writer.Write("GEOMETRYCOLLECTION ");
AppendGeometryCollectionText(geometryCollection, writer);
}