/// <summary>
/// Creates a new instance of GeographicInfo
/// </summary>
public GeographicInfo()
{
_datum = new Datum();
_meridian = new Meridian();
_unit = new AngularUnit();
}
private void cmbDatums_SelectedIndexChanged(object sender, EventArgs e)
{
Datum d = new Datum((string)cmbDatums.SelectedItem);
_selectedProjectionInfo.GeographicInfo.Datum = d;
switch(d.DatumType)
{
case DatumTypes.GridShift:
radGridShift.Checked = true;
break;
case DatumTypes.Param3:
rad3.Checked = true;
break;
case DatumTypes.Param7:
rad7.Checked = true;
break;
case DatumTypes.WGS84:
radWGS84.Checked = true;
break;
}
cmbEllipsoid.SelectedItem = d.Spheroid.Name;
}
/// <summary>
/// Compares two datums to see if they are actually describing the same thing and
/// therefore don't need to be transformed.
/// </summary>
/// <param name="otherDatum">The other datum to compare against</param>
/// <returns>The boolean result of the operation.</returns>
public bool Matches(Datum otherDatum)
{
if (_datumtype != otherDatum.DatumType) return false;
if (_spheroid.EquatorialRadius != otherDatum.Spheroid.EquatorialRadius) return false;
if (_spheroid.PolarRadius != otherDatum.Spheroid.PolarRadius) return false;
if(_datumtype == DatumTypes.Param3)
{
if (_toWGS84[0] != otherDatum.ToWGS84[0]) return false;
if (_toWGS84[1] != otherDatum.ToWGS84[1]) return false;
if (_toWGS84[2] != otherDatum.ToWGS84[2]) return false;
return true;
}
if(_datumtype == DatumTypes.Param7)
{
if (_toWGS84[0] != otherDatum.ToWGS84[0]) return false;
if (_toWGS84[1] != otherDatum.ToWGS84[1]) return false;
if (_toWGS84[2] != otherDatum.ToWGS84[2]) return false;
if (_toWGS84[3] != otherDatum.ToWGS84[3]) return false;
if (_toWGS84[4] != otherDatum.ToWGS84[4]) return false;
if (_toWGS84[5] != otherDatum.ToWGS84[5]) return false;
if (_toWGS84[6] != otherDatum.ToWGS84[6]) return false;
return true;
}
if (_datumtype == DatumTypes.GridShift)
{
if (_nadGrids.Length != otherDatum.NadGrids.Length) return false;
for(int i = 0; i < _nadGrids.Length; i++)
{
if(_nadGrids[i] != otherDatum.NadGrids[i]) return false;
}
return true;
}
return false;
}
