public GeographicCoordSystem(WktItem wktItem) { _name = wktItem.Value.Split(',')[0].Replace("\"", string.Empty); _angularUnit = new AngularUnit(wktItem.GetWktItem("UNIT")); _primeMeridian = new PrimeMeridian(wktItem.GetWktItem("PRIMEM")); _datum = new Datum(wktItem.GetWktItem("DATUM")); _oracleSpatialSRID = int.MinValue; }
/* * 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")); //5ms 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); }
public ISpatialReference Parse(string wkt) { _rootWktItem = new WktSpliter().Split(wkt); //2ms if (_rootWktItem == null) { return(null); } bool isPrj = IsProjectionCoordSystem(); bool isGeo = IsGeographicCoordSystem(); if (!isPrj && !isGeo) { throw new Exception("本系统只支持地理坐标系统与投影坐标系统,坐标系统\"" + _rootWktItem.Name + "\"不受支持。"); } IGeographicCoordSystem _geoCoordSystem = null; IProjectionCoordSystem _prjCoordSystem = null; _geoCoordSystem = ParseGeoCoordSystem(_rootWktItem.GetWktItem(cstGeoCoordSystem)); _prjCoordSystem = ParseProjectionCoordSystem(_rootWktItem.GetWktItem(cstPrjCoordSystem)); //8ms return(new SpatialReference(_geoCoordSystem, _prjCoordSystem)); }
//DATUM["D_WGS_1984", // SPHEROID["WGS_1984",6378137.0,298.257223563] // ] public Datum(WktItem wktItem) { Spheroid = new Spheroid(wktItem.GetWktItem("SPHEROID")); Name = (wktItem.Value.Split(',')[0]).Replace("\"", string.Empty); }