public ShapefileBlockReader(string path, ShapefileIndexReader index, IGeometryFactory geometryFactory = null, GeometryTransform transform = null, int blockSize = 25)
: base(path, geometryFactory, transform)
{
_block = new int[blockSize, 2];
_blockPos = blockSize;
_index = index;
}
public ShapefileBlockReader(string path, ShapefileIndexReader index, IGeometryFactory geometryFactory = null, GeometryTransform transform = null, int blockSize = 25)
: base(path, geometryFactory, transform)
{
_block = new int[blockSize, 2];
_blockPos = blockSize;
_index = index;
}
public static void Reproject(string destinationFolder, string projection, params ReprojectShapefile[] shapes)
{
ProjectionInfo targetProjection = ProjectionInfo.FromEsriString(projection);
foreach (ReprojectShapefile shape in shapes)
{
string shapePath = Path.Combine(destinationFolder, shape.DestinationName);
ShapefileHeader shapeHeader = ShapefileHeader.CreateEmpty(ShapefileGeometryType.Polygon);
DbfHeader dbfHeader = new DbfHeader();
dbfHeader.AddCharacter("Label", 80);
GeometryFactory gf = new GeometryFactory();
using (ShapefileDataWriter writer = ShapefileDataWriter.Create(shapePath + ".shp", dbfHeader, shapeHeader))
{
GeometryTransform transform = null;
if (File.Exists(Path.ChangeExtension(shape.Source, ".prj")))
{
transform = GeometryTransform.GetTransform(shape.Source, projection);
if (transform != null)
File.WriteAllText(shapePath + ".prj", projection);
else
File.Copy(Path.ChangeExtension(shape.Source, ".prj"), shapePath + ".prj");
}
using (ShapefileIndexReader index = new ShapefileIndexReader(Path.ChangeExtension(shape.Source, ".shx")))
{
if (transform != null)
writer.Header.Bounds.ExpandToInclude(transform.Apply(index.Header.Bounds));
else
writer.Header.Bounds.ExpandToInclude(index.Header.Bounds);
Task[] tasks = new Task[Environment.ProcessorCount];
for (int i = 0; i < tasks.Length; i++)
{
tasks[i] = Task.Factory.StartNew(() =>
{
using (ShapefileBlockReader reader = new ShapefileBlockReader(shape.Source, index, gf, transform))
{
while (reader.Read())
writer.Write(reader.Geometry, reader.Record.GetString(shape.Label));
}
});
}
Task.WaitAll(tasks);
writer.Flush();
}
}
}
}
public static void Combine(string finalShape, string projection, params CombineShapefile[] combineShapes)
{
DbfHeader dbfHeader = new DbfHeader();
dbfHeader.AddCharacter("Label", 80);
ShapefileHeader shapeHeader = ShapefileHeader.CreateEmpty(ShapefileGeometryType.Polygon);
GeometryFactory gf = new GeometryFactory();
using (ShapefileDataWriter writer = ShapefileDataWriter.Create(finalShape, dbfHeader, shapeHeader))
{
// Write the projection file.
File.WriteAllText(Path.ChangeExtension(finalShape, ".prj"), projection);
foreach (CombineShapefile workerShp in combineShapes)
{
GeometryTransform transform = GeometryTransform.GetTransform(workerShp.FilePath, projection);
using (ShapefileIndexReader index = new ShapefileIndexReader(Path.ChangeExtension(workerShp.FilePath, ".shx")))
{
if (transform != null)
writer.Header.Bounds.ExpandToInclude(transform.Apply(index.Header.Bounds));
else
writer.Header.Bounds.ExpandToInclude(index.Header.Bounds);
Task[] tasks = new Task[Environment.ProcessorCount];
for (int i = 0; i < tasks.Length; i++)
{
tasks[i] = Task.Factory.StartNew(() =>
{
using (ShapefileBlockReader reader = new ShapefileBlockReader(workerShp.FilePath, index, gf, transform))
{
while (reader.Read())
writer.Write(reader.Geometry, reader.Record.GetString(workerShp.Label));
}
});
}
Task.WaitAll(tasks);
writer.Flush();
}
}
}
}