private NameMapItem CreatNameMapItem(XElement prjParamter)
{
NameMapItem nameMapItem = new NameMapItem(prjParamter.Attribute(XName.Get("name")).Value,
prjParamter.Attribute(XName.Get("esri")).Value,
prjParamter.Attribute(XName.Get("wkt")).Value,
prjParamter.Attribute(XName.Get("proj4")).Value,
prjParamter.Attribute(XName.Get("epsg")).Value,
prjParamter.Attribute(XName.Get("envi")).Value,
prjParamter.Attribute(XName.Get("geotiff")).Value);
return(nameMapItem);
}
public object Clone()
{
NameMapItem v = new NameMapItem();
v.ENVIName = this.ENVIName;
v.EPSGName = this.EPSGName;
v.EsriName = this.EsriName;
v.GeoTiffName = this.GeoTiffName;
v.Name = this.Name;
v.Proj4Name = this.Proj4Name;
v.WktName = this.WktName;
return(v);
}
public List <NameMapItem> GetPrjParameterItems()
{
if (_prjParameterItems != null)
{
return(_prjParameterItems);
}
_prjParameterItems = new List <NameMapItem>();
IEnumerable <XElement> prjParamters = _root.Element(XName.Get("PrjParamters")).Elements(XName.Get("PrjParameter"));
NameMapItem nameMapItem = null;
foreach (XElement prjParamter in prjParamters)
{
nameMapItem = CreatNameMapItem(prjParamter);
_prjParameterItems.Add(nameMapItem);
}
return(_prjParameterItems);
}
public List <NameMapItem> GetPrjNameMapItems()
{
if (_prjNameMapItems != null)
{
return(_prjNameMapItems);
}
_prjNameMapItems = new List <NameMapItem>();
IEnumerable <XElement> projects = GetProjectNodes();
NameMapItem nameMapItem = null;
foreach (XElement project in projects)
{
nameMapItem = CreatNameMapItem(project);
_prjNameMapItems.Add(nameMapItem);
}
return(_prjNameMapItems);
}
/*
* PROJECTION["Mercator"],
* PARAMETER["False_Easting",0.0],
* PARAMETER["False_Northing",0.0],
* PARAMETER["Central_Meridian",0.0],
* PARAMETER["Standard_Parallel_1",0.0],
* UNIT["Meter",1.0]
*/
protected override IProjectionCoordSystem ParseProjectionCoordSystem(WktItem wktItem)
{
if (wktItem == null)//Is Graphics Coordinate System
{
return(null);
}
string name = wktItem.Value.Split(',')[0].Replace("\"", string.Empty);
NameMapItem prjName = GetPrjName(wktItem.GetWktItem("PROJECTION"));
if (prjName == null)
{
throw new Exception("投影坐标系统\"" + name + "\"没有在系统中预先配置。");
}
NameValuePair[] parameters = GetPrjParameters(wktItem.GetWktItems("PARAMETER"));
AngularUnit unit = new AngularUnit(wktItem.GetWktItem("UNIT"));
ProjectionCoordSystem prj = new ProjectionCoordSystem(prjName, parameters, unit);
prj.NameDes = name;
return(prj);
}
private NameValuePair[] GetPrjParameters(WktItem[] wktItems)
{
List <NameValuePair> values = new List <NameValuePair>();
using (OGCWkt2Proj4Mapper map = new OGCWkt2Proj4Mapper())
{
for (int i = 0; i < wktItems.Length; i++)
{
NameMapItem name = null;
WktItem witem = wktItems[i];
string[] vs = witem.Value.Split(',');
string pname = vs[0].Replace("\"", string.Empty);
double pvalue = double.Parse(vs[1]);
try
{
switch (_wktSource)
{
case enumWKTSource.EsriPrjFile:
name = map.GetParameterFromEsriName(pname);
break;
case enumWKTSource.GDAL:
name = map.GetParameterFromWKTName(pname);
break;
default:
name = map.GetParameterFromWKTName(pname);
break;
}
if (name != null)
{
values.Add(new NameValuePair(name, pvalue));
}
}
catch { continue; }
}
}
return(values.Count > 0 ? values.ToArray() : null);
}
public NameValuePair(NameMapItem name, double value)
{
Name = name;
Value = value;
}
public ProjectionCoordSystem(NameMapItem name, NameValuePair[] parameters, AngularUnit unit)
{
_name = name;
_parameters = parameters;
_unit = unit;
}