/// <summary>
/// Parses the datum from the esri string
/// </summary>
/// <param name="esriString">The string to parse values from</param>
public void ParseEsriString(string esriString)
{
if (string.IsNullOrEmpty(esriString))
{
return;
}
if (esriString.Contains("DATUM") == false)
{
return;
}
int iStart = esriString.IndexOf("DATUM") + 7;
int iEnd = esriString.IndexOf(@""",", iStart) - 1;
if (iEnd < iStart)
{
return;
}
_name = esriString.Substring(iStart, iEnd - iStart + 1);
var datumEntry = _datumsHandler.Value[_name];
if (datumEntry != null)
{
DatumType = datumEntry.Type;
switch (DatumType)
{
case DatumType.Param3:
{
var transform = new double[3];
transform[0] = ParseDouble(datumEntry.P1);
transform[1] = ParseDouble(datumEntry.P2);
transform[2] = ParseDouble(datumEntry.P3);
ToWGS84 = transform;
}
break;
case DatumType.Param7:
{
double[] transform = new double[7];
transform[0] = ParseDouble(datumEntry.P1);
transform[1] = ParseDouble(datumEntry.P2);
transform[2] = ParseDouble(datumEntry.P3);
transform[3] = ParseDouble(datumEntry.P4);
transform[4] = ParseDouble(datumEntry.P5);
transform[5] = ParseDouble(datumEntry.P6);
transform[6] = ParseDouble(datumEntry.P7);
ToWGS84 = transform;
break;
}
case DatumType.GridShift:
if (!string.IsNullOrEmpty(datumEntry.Shift))
{
NadGrids = datumEntry.Shift.Split(new[] { ";" }, StringSplitOptions.RemoveEmptyEntries);
}
break;
}
}
_spheroid.ParseEsriString(esriString);
}
/// <summary>
/// parses the datum from the esri string
/// </summary>
/// <param name="esriString">The string to parse values from</param>
public void ParseEsriString(string esriString)
{
if (System.String.IsNullOrEmpty(esriString))
{
return;
}
if (esriString.Contains("DATUM") == false)
{
return;
}
int iStart = esriString.IndexOf("DATUM") + 7;
int iEnd = esriString.IndexOf(@""",", iStart) - 1;
if (iEnd < iStart)
{
return;
}
_name = esriString.Substring(iStart, iEnd - iStart + 1);
Assembly currentAssembly = Assembly.GetExecutingAssembly();
string fileName = null;
string currentAssemblyLocation = currentAssembly.Location;
if (!String.IsNullOrEmpty(currentAssemblyLocation))
{
fileName = Path.GetDirectoryName(currentAssemblyLocation) + "\\datums.xml";
}
Stream datumStream = File.Exists(fileName) ? File.Open(fileName, FileMode.Open) : currentAssembly.GetManifestResourceStream("DotSpatial.Projections.XML.datums.xml");
if (datumStream != null)
{
XmlTextReader reader = new XmlTextReader(datumStream);
while (reader.Read())
{
if (reader.AttributeCount == 0)
{
continue;
}
reader.MoveToAttribute("Name");
if (reader.Value != _name)
{
continue;
}
reader.MoveToAttribute("Type");
if (string.IsNullOrEmpty(reader.Value))
{
break;
}
DatumType = (DatumType)Enum.Parse(typeof(DatumType), reader.Value);
switch (DatumType)
{
case DatumType.Param3:
{
double[] transform = new double[3];
for (int i = 0; i < 3; i++)
{
reader.MoveToAttribute("P" + (i + 1));
if (!string.IsNullOrEmpty(reader.Value))
{
transform[i] = double.Parse(reader.Value, CultureInfo.InvariantCulture);
}
}
ToWGS84 = transform;
}
break;
case DatumType.Param7:
{
double[] transform = new double[7];
for (int i = 0; i < 7; i++)
{
reader.MoveToAttribute("P" + (i + 1));
if (!string.IsNullOrEmpty(reader.Value))
{
transform[i] = double.Parse(reader.Value, CultureInfo.InvariantCulture);
}
}
ToWGS84 = transform;
break;
}
case DatumType.GridShift:
reader.MoveToAttribute("Shift");
if (string.IsNullOrEmpty(reader.Value))
{
continue;
}
NadGrids = reader.Value.Split(new[] { ";" }, StringSplitOptions.RemoveEmptyEntries);
break;
}
break;
}
}
_spheroid.ParseEsriString(esriString);
}
