private static GaiaExport SetGaiaGeoExportFunctions(GaiaGeoEndianMarker gaiaGeoEndianMarker, bool hasZ, bool hasM, bool useCompression)
{
var conversionNeeded = false;
switch (gaiaGeoEndianMarker)
{
case GaiaGeoEndianMarker.GAIA_LITTLE_ENDIAN:
if (!BitConverter.IsLittleEndian)
{
conversionNeeded = true;
}
break;
case GaiaGeoEndianMarker.GAIA_BIG_ENDIAN:
if (BitConverter.IsLittleEndian)
{
conversionNeeded = true;
}
break;
default:
/* unknown encoding; nor litte-endian neither big-endian */
return(null);
}
var gaiaExport = GaiaExport.Create(conversionNeeded);
gaiaExport.SetCoordinateType(hasZ, hasM, useCompression);
return(gaiaExport);
}
private static WriteCoordinates SetWriteCoordinatesFunction(GaiaExport gaiaExport)
{
if (gaiaExport.Uncompressed)
{
if (gaiaExport.HasZ && gaiaExport.HasM)
{
return(WriteXYZM);
}
if (gaiaExport.HasM)
{
return(WriteXYM);
}
if (gaiaExport.HasZ)
{
return(WriteXYZ);
}
return(WriteXY);
}
if (gaiaExport.HasZ && gaiaExport.HasM)
{
return(WriteCompressedXYZM);
}
if (gaiaExport.HasM)
{
return(WriteCompressedXYM);
}
if (gaiaExport.HasZ)
{
return(WriteCompressedXYZ);
}
return(WriteCompressedXY);
}
private static void WriteGeometryCollection(IGeometryCollection geom, GaiaExport gaiaExport, BinaryWriter bw)
{
gaiaExport.WriteInt32(bw, geom.NumGeometries);
for (var i = 0; i < geom.NumGeometries; i++)
{
bw.Write((byte)GaiaGeoBlobMark.GAIA_MARK_ENTITY);
WriteGeometry(geom[i], gaiaExport, bw);
}
}
private static void WriteXYZM(ICoordinateSequence coordinateSequence, GaiaExport export, BinaryWriter bw)
{
var wd = export.WriteDouble;
for (var i = 0; i < coordinateSequence.Count; i++)
{
var c = coordinateSequence.GetCoordinate(i);
wd(bw, c.X, c.Y, c.Z, coordinateSequence.GetOrdinate(i, Ordinate.M));
}
}
private static void WriteGeometry(IGeometry geom, GaiaExport gaiaExport, BinaryWriter bw)
{
WriteCoordinates writeCoordinates = SetWriteCoordinatesFunction(gaiaExport);
//Geometry type
int coordinateFlag = gaiaExport.CoordinateFlag;
int coordinateFlagNotValidForCompression = coordinateFlag > 1000000
? coordinateFlag - 1000000
: coordinateFlag;
switch (geom.GeometryType.ToUpper())
{
case "POINT":
gaiaExport.WriteInt32(bw, (int)(GaiaGeoGeometry.GAIA_POINT) | coordinateFlagNotValidForCompression);
WritePoint((IPoint)geom, writeCoordinates, gaiaExport, bw);
break;
case "LINESTRING":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_LINESTRING | coordinateFlag);
WriteLineString((ILineString)geom, writeCoordinates, gaiaExport, bw);
break;
case "POLYGON":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_POLYGON | coordinateFlag);
WritePolygon((IPolygon)geom, writeCoordinates, gaiaExport, bw);
break;
case "MULTIPOINT":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_MULTIPOINT | coordinateFlagNotValidForCompression);
WriteMultiPoint((IMultiPoint)geom, writeCoordinates, gaiaExport, bw);
break;
case "MULTILINESTRING":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_MULTILINESTRING | coordinateFlag);
WriteMultiLineString((IMultiLineString)geom, writeCoordinates, gaiaExport, bw);
break;
case "MULTIPOLYGON":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_MULTIPOLYGON | coordinateFlag);
WriteMultiPolygon((IMultiPolygon)geom, writeCoordinates, gaiaExport, bw);
break;
case "GEOMETRYCOLLECTION":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_GEOMETRYCOLLECTION | coordinateFlagNotValidForCompression);
WriteGeometryCollection((IGeometryCollection)geom, gaiaExport, bw);
break;
default:
throw new ArgumentException("unknown geometry type");
}
}
private static WriteCoordinates SetWriteCoordinatesFunction(GaiaExport gaiaExport)
{
if (gaiaExport.Uncompressed)
{
if (gaiaExport.HasZ && gaiaExport.HasM)
return WriteXYZM;
if (gaiaExport.HasM)
return WriteXYM;
if (gaiaExport.HasZ)
return WriteXYZ;
return WriteXY;
}
if (gaiaExport.HasZ && gaiaExport.HasM)
return WriteCompressedXYZM;
if (gaiaExport.HasM)
return WriteCompressedXYM;
if (gaiaExport.HasZ)
return WriteCompressedXYZ;
return WriteCompressedXY;
}
private static void WriteMultiLineString(IMultiLineString geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
gaiaExport.WriteInt32(bw, geom.NumGeometries);
for (var i = 0; i < geom.NumGeometries; i++)
{
bw.Write((byte)GaiaGeoBlobMark.GAIA_MARK_ENTITY);
gaiaExport.WriteInt32(bw, gaiaExport.CoordinateFlag | (int)GaiaGeoGeometry.GAIA_LINESTRING);
WriteLineString((ILineString)geom[i], writeCoordinates, gaiaExport, bw);
}
}
private static void WritePoint(IPoint geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
writeCoordinates(geom.CoordinateSequence, gaiaExport, bw);
}
private static void WriteLineString(ILineString geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
var seq = geom.CoordinateSequence;
gaiaExport.WriteInt32(bw, seq.Count);
writeCoordinates(geom.CoordinateSequence, gaiaExport, bw);
}
private static void WritePolygon(IPolygon geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
gaiaExport.WriteInt32(bw, geom.NumInteriorRings + 1);
WriteLineString(geom.Shell, writeCoordinates, gaiaExport, bw);
for (var i = 0; i < geom.NumInteriorRings; i++)
{
WriteLineString(geom.GetInteriorRingN(i), writeCoordinates, gaiaExport, bw);
}
}
private static void WriteMultiPoint(IMultiPoint geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
var wi = gaiaExport.WriteInt32;
// number of coordinates
wi(bw, geom.NumGeometries);
// get the coordinate flag
var coordinateFlag = gaiaExport.CoordinateFlagUncompressed;
for (var i = 0; i < geom.NumGeometries; i++)
{
//write entity begin marker
bw.Write((byte)GaiaGeoBlobMark.GAIA_MARK_ENTITY);
//write entity marker
wi(bw, coordinateFlag + (int)GaiaGeoGeometryEntity.GAIA_TYPE_POINT);
//write coordinates
writeCoordinates(((IPoint)geom[i]).CoordinateSequence, gaiaExport, bw);
}
}
private static void WriteLineString(ILineString geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
var seq = geom.CoordinateSequence;
gaiaExport.WriteInt32(bw, seq.Count);
writeCoordinates(geom.CoordinateSequence, gaiaExport, bw);
}
private static void WriteCompressedXYZM(ICoordinateSequence coordinateSequence, GaiaExport export, BinaryWriter bw)
{
var wd = export.WriteDouble;
// Write initial coordinate
var cprev = coordinateSequence.GetCoordinate(0);
var mprev = coordinateSequence.GetOrdinate(0, Ordinate.M);
wd(bw, cprev.X, cprev.Y, cprev.Z, mprev);
var maxIndex = coordinateSequence.Count - 1;
if (maxIndex <= 0)
{
return;
}
var ws = export.WriteSingle;
for (var i = 1; i < maxIndex; i++)
{
var c = coordinateSequence.GetCoordinate(i);
var fx = (float)(c.X - cprev.X);
var fy = (float)(c.Y - cprev.Y);
var fz = (float)(c.Z - cprev.Z);
var fm = (float)(coordinateSequence.GetOrdinate(i, Ordinate.M) - mprev);
ws(bw, fx, fy, fz, fm);
cprev = c;
}
cprev = coordinateSequence.GetCoordinate(maxIndex);
mprev = coordinateSequence.GetOrdinate(maxIndex, Ordinate.M);
wd(bw, cprev.X, cprev.Y, cprev.Z, mprev);
}
private static void WriteMultiPoint(IMultiPoint geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
var wi = gaiaExport.WriteInt32;
// number of coordinates
wi(bw, geom.NumGeometries);
// get the coordinate flag
var coordinateFlag = gaiaExport.CoordinateFlagUncompressed;
for (var i = 0; i < geom.NumGeometries; i++)
{
//write entity begin marker
bw.Write((byte)GaiaGeoBlobMark.GAIA_MARK_ENTITY);
//write entity marker
wi(bw, coordinateFlag + (int)GaiaGeoGeometryEntity.GAIA_TYPE_POINT);
//write coordinates
writeCoordinates(((IPoint)geom[i]).CoordinateSequence, gaiaExport, bw);
}
}
private static void WriteGeometryCollection(IGeometryCollection geom, GaiaExport gaiaExport, BinaryWriter bw)
{
gaiaExport.WriteInt32(bw, geom.NumGeometries);
for (var i = 0; i < geom.NumGeometries; i++)
{
bw.Write((byte)GaiaGeoBlobMark.GAIA_MARK_ENTITY);
WriteGeometry(geom[i], gaiaExport, bw);
}
}
private static void WriteCompressedXYZM(ICoordinateSequence coordinateSequence, GaiaExport export, BinaryWriter bw)
{
var wd = export.WriteDouble;
// Write initial coordinate
var cprev = coordinateSequence.GetCoordinate(0);
var mprev = coordinateSequence.GetOrdinate(0, Ordinate.M);
wd(bw, cprev.X, cprev.Y, cprev.Z, mprev);
var maxIndex = coordinateSequence.Count - 1;
if (maxIndex <= 0) return;
var ws = export.WriteSingle;
for (var i = 1; i < maxIndex; i++)
{
var c = coordinateSequence.GetCoordinate(i);
var fx = (float)(c.X - cprev.X);
var fy = (float)(c.Y - cprev.Y);
var fz = (float)(c.Z - cprev.Z);
var fm = (float)(coordinateSequence.GetOrdinate(i, Ordinate.M) - mprev);
ws(bw, fx, fy, fz, fm);
cprev = c;
}
cprev = coordinateSequence.GetCoordinate(maxIndex);
mprev = coordinateSequence.GetOrdinate(maxIndex, Ordinate.M);
wd(bw, cprev.X, cprev.Y, cprev.Z, mprev);
}
private static void WriteCompressedXY(ICoordinateSequence coordinateSequence, GaiaExport export, BinaryWriter bw)
{
var wd = export.WriteDouble;
// Write initial coordinate
var cprev = coordinateSequence.GetCoordinate(0);
wd(bw, cprev.X, cprev.Y);
var ws = export.WriteSingle;
var maxIndex = coordinateSequence.Count - 1;
if (maxIndex <= 0) return;
for (var i = 1; i < maxIndex; i++)
{
var c = coordinateSequence.GetCoordinate(i);
var fx = (float)(c.X - cprev.X);
var fy = (float)(c.Y - cprev.Y);
ws(bw, fx, fy);
cprev = c;
}
// Write last coordinate
cprev = coordinateSequence.GetCoordinate(maxIndex);
wd(bw, cprev.X, cprev.Y);
}
private static void WriteXYZM(ICoordinateSequence coordinateSequence, GaiaExport export, BinaryWriter bw)
{
var wd = export.WriteDouble;
for (var i = 0; i < coordinateSequence.Count; i++)
{
var c = coordinateSequence.GetCoordinate(i);
wd(bw, c.X, c.Y, c.Z, coordinateSequence.GetOrdinate(i, Ordinate.M));
}
}
private static void WritePoint(IPoint geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
writeCoordinates(geom.CoordinateSequence, gaiaExport, bw);
}
private static void WriteMultiPolygon(IGeometryCollection geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
gaiaExport.WriteInt32(bw, geom.NumGeometries);
for (var i = 0; i < geom.NumGeometries; i++)
{
bw.Write((byte)GaiaGeoBlobMark.GAIA_MARK_ENTITY);
gaiaExport.WriteInt32(bw, gaiaExport.CoordinateFlag | (int)GaiaGeoGeometry.GAIA_POLYGON);
WritePolygon((IPolygon)geom[i], writeCoordinates, gaiaExport, bw);
}
}
private static void WriteMultiPolygon(IGeometryCollection geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
gaiaExport.WriteInt32(bw, geom.NumGeometries);
for (var i = 0; i < geom.NumGeometries; i++)
{
bw.Write((byte)GaiaGeoBlobMark.GAIA_MARK_ENTITY);
gaiaExport.WriteInt32(bw, gaiaExport.CoordinateFlag | (int)GaiaGeoGeometry.GAIA_POLYGON);
WritePolygon((IPolygon)geom[i], writeCoordinates, gaiaExport, bw);
}
}
private static void WriteCompressedXY(ICoordinateSequence coordinateSequence, GaiaExport export, BinaryWriter bw)
{
var wd = export.WriteDouble;
// Write initial coordinate
var cprev = coordinateSequence.GetCoordinate(0);
wd(bw, cprev.X, cprev.Y);
var ws = export.WriteSingle;
var maxIndex = coordinateSequence.Count - 1;
if (maxIndex <= 0)
{
return;
}
for (var i = 1; i < maxIndex; i++)
{
var c = coordinateSequence.GetCoordinate(i);
var fx = (float)(c.X - cprev.X);
var fy = (float)(c.Y - cprev.Y);
ws(bw, fx, fy);
cprev = c;
}
// Write last coordinate
cprev = coordinateSequence.GetCoordinate(maxIndex);
wd(bw, cprev.X, cprev.Y);
}
private static void WriteMultiLineString(IMultiLineString geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
gaiaExport.WriteInt32(bw, geom.NumGeometries);
for (var i = 0; i < geom.NumGeometries; i++)
{
bw.Write((byte)GaiaGeoBlobMark.GAIA_MARK_ENTITY);
gaiaExport.WriteInt32(bw, gaiaExport.CoordinateFlag | (int)GaiaGeoGeometry.GAIA_LINESTRING);
WriteLineString((ILineString)geom[i], writeCoordinates, gaiaExport, bw);
}
}
private static void WriteGeometry(IGeometry geom, GaiaExport gaiaExport, BinaryWriter bw)
{
WriteCoordinates writeCoordinates = SetWriteCoordinatesFunction(gaiaExport);
//Geometry type
int coordinateFlag = gaiaExport.CoordinateFlag;
int coordinateFlagNotValidForCompression = coordinateFlag > 1000000
? coordinateFlag - 1000000
: coordinateFlag;
switch (geom.GeometryType.ToUpper())
{
case "POINT":
gaiaExport.WriteInt32(bw, (int)(GaiaGeoGeometry.GAIA_POINT) | coordinateFlagNotValidForCompression);
WritePoint((IPoint)geom, writeCoordinates, gaiaExport, bw);
break;
case "LINESTRING":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_LINESTRING | coordinateFlag);
WriteLineString((ILineString)geom, writeCoordinates, gaiaExport, bw);
break;
case "POLYGON":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_POLYGON | coordinateFlag);
WritePolygon((IPolygon)geom, writeCoordinates, gaiaExport, bw);
break;
case "MULTIPOINT":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_MULTIPOINT | coordinateFlagNotValidForCompression);
WriteMultiPoint((IMultiPoint)geom, writeCoordinates, gaiaExport, bw);
break;
case "MULTILINESTRING":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_MULTILINESTRING | coordinateFlag);
WriteMultiLineString((IMultiLineString)geom, writeCoordinates, gaiaExport, bw);
break;
case "MULTIPOLYGON":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_MULTIPOLYGON | coordinateFlag);
WriteMultiPolygon((IMultiPolygon)geom, writeCoordinates, gaiaExport, bw);
break;
case "GEOMETRYCOLLECTION":
gaiaExport.WriteInt32(bw, (int)GaiaGeoGeometry.GAIA_GEOMETRYCOLLECTION | coordinateFlagNotValidForCompression);
WriteGeometryCollection((IGeometryCollection)geom, gaiaExport, bw);
break;
default:
throw new ArgumentException("unknown geometry type");
}
}
private static void WritePolygon(IPolygon geom, WriteCoordinates writeCoordinates, GaiaExport gaiaExport, BinaryWriter bw)
{
gaiaExport.WriteInt32(bw, geom.NumInteriorRings + 1);
WriteLineString(geom.Shell, writeCoordinates, gaiaExport, bw);
for (var i = 0; i < geom.NumInteriorRings; i++)
WriteLineString(geom.GetInteriorRingN(i), writeCoordinates, gaiaExport, bw);
}