public List <Record <T> > GetShapes <T>(string sourceName, BaseShapeParser <T> parser)
{
var metadatas = ParseMetadatas(sourceName + ".dbf");
var shapes = ParseShp(sourceName + ".shp", parser);
List <Record <T> > recordList = new List <Record <T> >();
for (int i = 0; i < shapes.Count; i++)
{
Record <T> newRecord = new Record <T>(i, shapes[i], metadatas[i]);
recordList.Add(newRecord);
}
return(recordList);
}
public Record <T> GetShape <T>(string sourceName, BaseShapeParser <T> parser, ShapeIndex index)
{
using (BinaryReader reader = new BinaryReader(File.OpenRead(sourceName + ".shp")))
{
byte[] bytesHeader = new byte[8];
byte[] bytesRecord = new byte[2 * index.ContentLength];
reader.BaseStream.Seek(2 * index.Offset, SeekOrigin.Begin);
reader.Read(bytesHeader, 0, 8);
var recordNumber = ReadInt(bytesHeader, 0, false);
var contentLength = ReadInt(bytesHeader, 4, false);
reader.Read(bytesRecord, 0, 2 * index.ContentLength);
T shape = parser.Parse(bytesRecord, ReadInt, ReadDouble);
Record <T> record = new Record <T>(recordNumber, shape, index.Metadatas);
return(record);
}
}
public List <T> ParseShp <T>(string shp, BaseShapeParser <T> parser)
{
List <T> shapes = new List <T>();
using (BinaryReader reader = new BinaryReader(File.OpenRead(shp)))
{
byte[] headerArray = new byte[100];
int read = reader.Read(headerArray, 0, 100);
var fileCode = ReadInt(headerArray, 0, false);
var fileLength = ReadInt(headerArray, 24, false);
var version = ReadInt(headerArray, 28, true);
var globalShapeType = ReadInt(headerArray, 32, true);
var xMin = ReadDouble(headerArray, 36, true);
var yMin = ReadDouble(headerArray, 44, true);
var xMax = ReadDouble(headerArray, 52, true);
var yMax = ReadDouble(headerArray, 60, true);
var zMin = ReadDouble(headerArray, 68, true);
var zMax = ReadDouble(headerArray, 76, true);
var mMin = ReadDouble(headerArray, 84, true);
var mMax = ReadDouble(headerArray, 92, true);
if (globalShapeType != (int)parser.GeometryType)
{
throw new InvalidOperationException($"Invalid record shape type : expected {parser.GeometryType} but found {globalShapeType}");
}
byte[] recordHeader = new byte[8];
while (reader.Read(recordHeader, 0, 8) != 0)
{
var recordNumber = ReadInt(recordHeader, 0, false);
var contentLength = ReadInt(recordHeader, 4, false);
byte[] recordContent = new byte[2 * contentLength];
reader.Read(recordContent, 0, 2 * contentLength);
var recordShapeType = ReadInt(recordContent, 0, true);
shapes.Add(parser.Parse(recordContent, new ReadIntDelegate(ReadInt), new ReadDoubleDelegate(ReadDouble)));
}
}
return(shapes);
}
