/// <summary>
///
/// </summary>
/// <param name="prjType">气象局定义的投影类型</param>
/// <param name="standard_parallel_1"></param>
/// <param name="standard_parallel_2"></param>
/// <param name="central_meridian"></param>
/// <returns></returns>
public ISpatialReference GetSpatialRef(int prjType, double standard_parallel_1, double standard_parallel_2, double central_meridian)
{
if (prjType == 0 || prjType == 1 || prjType == -1)
{
return(new SpatialReference(new GeographicCoordSystem()));
}
IGeographicCoordSystem geoCoordSystem = new GeographicCoordSystem();
NameValuePair[] paras = new NameValuePair[3];
paras[0] = new NameValuePair(GetParaName("sp1"), standard_parallel_1);
paras[1] = new NameValuePair(GetParaName("sp2"), standard_parallel_2);
paras[2] = new NameValuePair(GetParaName("lon0"), central_meridian);
NameMapItem prjName = GetProjectionName(prjType);
IProjectionCoordSystem prjCoordSystem = new ProjectionCoordSystem(prjName, paras, new AngularUnit("Degree", 0d));
return(new SpatialReference(geoCoordSystem, prjCoordSystem));
}
/// <summary>
///
/// </summary>
/// <param name="enviPrjId">MAS二期九度公司扩展的投影类型，采用ENVI的投影ID</param>
/// <param name="standard_parallel_1"></param>
/// <param name="standard_parallel_2"></param>
/// <param name="latitude_of_origin"></param>
/// <param name="central_meridian"></param>
/// <param name="false_easting"></param>
/// <param name="false_northing"></param>
/// <param name="scale_factor"></param>
/// <returns></returns>
public ISpatialReference GetSpatialRef(int enviPrjId, double standard_parallel_1, double standard_parallel_2,
double latitude_of_origin, double central_meridian,
double false_easting, double false_northing, double scale_factor)
{
IGeographicCoordSystem geoCoordSystem = new GeographicCoordSystem();
if (enviPrjId == 0 || enviPrjId == 1)
{
return(new SpatialReference(geoCoordSystem, null));
}
NameValuePair[] paras = new NameValuePair[7];
paras[0] = new NameValuePair(GetParaName("sp1"), standard_parallel_1);
paras[1] = new NameValuePair(GetParaName("sp2"), standard_parallel_2);
paras[2] = new NameValuePair(GetParaName("lat0"), latitude_of_origin);
paras[3] = new NameValuePair(GetParaName("lon0"), central_meridian);
paras[4] = new NameValuePair(GetParaName("x0"), false_easting);
paras[5] = new NameValuePair(GetParaName("y0"), false_northing);
paras[6] = new NameValuePair(GetParaName("k0"), scale_factor);
NameMapItem prjName = _stdsMapTableParser.GetPrjNameItemByEnviName(enviPrjId.ToString());
IProjectionCoordSystem prjCoordSystem = new ProjectionCoordSystem(prjName, paras, new AngularUnit("Degree", 0d));
return(new SpatialReference(geoCoordSystem, prjCoordSystem));
}
