private EpsgCrs ReadValue(uint key, BinaryReader reader)
{
var datum = EpsgMicroDatabase.Default.GetDatum(reader.ReadUInt16());
var baseCrsCode = reader.ReadUInt16();
var baseCrs = baseCrsCode == 0 ? null : (EpsgCrsGeodetic)EpsgMicroDatabase.Default.GetCrs(baseCrsCode);
var baseOpCode = reader.ReadInt16();
var coordSys = EpsgMicroDatabase.Default.GetCoordinateSystem(reader.ReadUInt16());
var area = EpsgMicroDatabase.Default.GetArea(reader.ReadUInt16());
var name = TextReader.GetString(reader.ReadUInt16());
var isDeprecated = reader.ReadByte() != 0;
var kind = (EpsgCrsKind)reader.ReadByte();
Contract.Assume(kind != EpsgCrsKind.Compound);
Contract.Assume(key <= Int32.MaxValue);
var epsgCode = unchecked ((int)key);
if (kind == EpsgCrsKind.Projected)
{
return(new EpsgCrsProjected(epsgCode, name, area, isDeprecated, coordSys, (EpsgDatumGeodetic)datum, baseCrs, baseOpCode));
}
if (kind == EpsgCrsKind.Geographic2D || kind == EpsgCrsKind.Geographic3D)
{
return(new EpsgCrsGeographic(epsgCode, name, area, isDeprecated, coordSys, (EpsgDatumGeodetic)datum, baseCrs, baseOpCode, kind));
}
if (kind == EpsgCrsKind.Geocentric)
{
return(new EpsgCrsGeocentric(epsgCode, name, area, isDeprecated, coordSys, (EpsgDatumGeodetic)datum, baseCrs, baseOpCode));
}
if (kind == EpsgCrsKind.Vertical)
{
return(new EpsgCrsVertical(epsgCode, name, area, isDeprecated, coordSys, (EpsgDatumVertical)datum));
}
if (kind == EpsgCrsKind.Engineering)
{
return(new EpsgCrsEngineering(epsgCode, name, area, isDeprecated, coordSys, (EpsgDatumEngineering)datum));
}
throw new NotImplementedException();
}
private List <INamedParameter> ReadParametersForOperation(ushort key, EpsgParameterUsage[] usages, BinaryReader reader)
{
Contract.Requires(usages != null);
Contract.Requires(reader != null);
var parameters = new List <INamedParameter>(usages.Length);
foreach (var usage in usages)
{
var valueCode = reader.ReadUInt16();
var uomCode = reader.ReadUInt16();
EpsgUnit unit;
if (uomCode == UInt16.MaxValue)
{
unit = null;
}
else
{
unit = EpsgMicroDatabase.Default.GetUnit(uomCode);
Contract.Assume(unit != null);
}
var parameterName = usage.ParameterInfo.Name;
if (valueCode != 0xffff)
{
INamedParameter parameter;
if ((valueCode & 0xc000) == 0x8000)
{
var textValue = _textReader.GetString((ushort)(valueCode & 0x7fff));
parameter = new NamedParameter <string>(parameterName, textValue, unit);
}
else
{
parameter = new NamedParameter <double>(parameterName, _numberReader.GetValue(valueCode), unit);
}
parameters.Add(parameter);
}
}
return(parameters);
}