/// <summary>
/// 获取投影坐标系的描述信息
/// Get the description information of the projected coordinate system
/// </summary>
private String GetEarthPrjStr(PrjCoordSys crtPrj)
{
StringBuilder prjStrBuilder = new StringBuilder();
try
{
PrjParameter crtPrjParm = crtPrj.PrjParameter;
prjStrBuilder.AppendLine(m_type + crtPrj.Name);
prjStrBuilder.AppendLine(m_name + crtPrj.Projection.Name);
prjStrBuilder.AppendLine(m_longitude + crtPrjParm.CentralMeridian.ToString("0.000000"));
prjStrBuilder.AppendLine(m_latitude + crtPrjParm.CentralParallel.ToString());
prjStrBuilder.AppendLine(m_firparallel + crtPrjParm.StandardParallel1.ToString());
prjStrBuilder.AppendLine(m_secparallel + crtPrjParm.StandardParallel2.ToString());
prjStrBuilder.AppendLine(m_offsetX + crtPrjParm.FalseEasting.ToString(".0000"));
prjStrBuilder.AppendLine(m_offsetY + crtPrjParm.FalseNorthing.ToString(".0000"));
prjStrBuilder.AppendLine(m_scalefactor + crtPrjParm.ScaleFactor.ToString());
prjStrBuilder.AppendLine(m_azimuth + crtPrjParm.Azimuth.ToString(".0000"));
prjStrBuilder.AppendLine(m_firlongitude + crtPrjParm.FirstPointLongitude.ToString());
prjStrBuilder.AppendLine(m_seclongitude + crtPrjParm.SecondPointLongitude.ToString());
prjStrBuilder.AppendLine(m_geocoordsys + crtPrj.GeoCoordSys.Name);
prjStrBuilder.AppendLine(m_geodatum + crtPrj.GeoCoordSys.GeoDatum.Name);
prjStrBuilder.AppendLine(m_datumspheroid + crtPrj.GeoCoordSys.GeoDatum.GeoSpheroid.Name);
prjStrBuilder.AppendLine(m_majorradius + crtPrj.GeoCoordSys.GeoDatum.GeoSpheroid.Axis.ToString(".00"));
prjStrBuilder.AppendLine(m_flattening + crtPrj.GeoCoordSys.GeoDatum.GeoSpheroid.Flatten.ToString());
prjStrBuilder.AppendLine(m_centralmeridian + crtPrj.GeoCoordSys.GeoPrimeMeridian.LongitudeValue.ToString("0.000000"));
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message);
}
return(prjStrBuilder.ToString());
}
/// <summary>
/// 拷贝构造函数。
/// </summary>
/// <param name="prjParameter">地图投影参数对象。</param>
/// <exception cref="ArgumentNullException">地图投影参数对象为 null 时抛出异常。</exception>
public PrjParameter(PrjParameter prjParameter)
{
if (prjParameter == null) throw new ArgumentNullException();
this.Azimuth = prjParameter.Azimuth;
this.CentralMeridian = prjParameter.CentralMeridian;
this.CentralParallel = prjParameter.CentralParallel;
this.FalseEasting = prjParameter.FalseEasting;
this.FalseNorthing = prjParameter.FalseNorthing;
this.FirstPointLongitude = prjParameter.FirstPointLongitude;
this.FirstStandardParallel = prjParameter.FirstStandardParallel;
this.ScaleFactor = prjParameter.ScaleFactor;
this.SecondPointLongitude = prjParameter.SecondPointLongitude;
this.SecondStandardParallel = prjParameter.SecondStandardParallel;
}
// 按照不同的投影类型，初始化投影坐标系
// Initialize the projection coordinates by the different projection type.
private PrjCoordSys GetTargetPrjCoordSys(int type)
{
PrjCoordSys targetPrjCoordSys = null;
PrjParameter parameter = null;
Projection projection = null;
switch (type)
{
case 1:
{
targetPrjCoordSys = new PrjCoordSys(PrjCoordSysType.UserDefined);
projection = new Projection(ProjectionType.GaussKruger);
targetPrjCoordSys.Projection = projection;
parameter = new PrjParameter();
parameter.CentralMeridian = 110;
parameter.StandardParallel1 = 20;
parameter.StandardParallel2 = 40;
targetPrjCoordSys.PrjParameter = parameter;
}
break;
case 2:
{
targetPrjCoordSys = new PrjCoordSys(PrjCoordSysType.UserDefined);
projection = new Projection(ProjectionType.TransverseMercator);
targetPrjCoordSys.Projection = projection;
parameter = new PrjParameter();
parameter.CentralMeridian = 110;
parameter.StandardParallel1 = 0;
targetPrjCoordSys.PrjParameter = parameter;
}
break;
case 3:
{
targetPrjCoordSys = new PrjCoordSys(PrjCoordSysType.UserDefined);
projection = new Projection(ProjectionType.LambertConformalConic);
targetPrjCoordSys.Projection = projection;
parameter = new PrjParameter();
parameter.CentralMeridian = 110;
parameter.StandardParallel1 = 30;
targetPrjCoordSys.PrjParameter = parameter;
}
break;
default:
break;
}
return(targetPrjCoordSys);
}
