public class SpatialReferenceHelper
{
// Fields
private const double ParaC = 6399596.65198801;
private const double ParaE1 = 0.00669438499958795;
private const double Parak0 = 1.57048687472752E-07;
private const double Parak1 = 0.00505250559291393;
private const double Parak2 = 2.98473350966158E-05;
private const double Parak3 = 2.41627215981336E-07;
private const double Parak4 = 2.22241909461273E-09;
// Methods
public static double DistanceOfTwoEarthPoints(double lng1, double lat1, double lng2, double lat2, GaussSphere gs)
{
double d = Rad(lat1);
double num2 = Rad(lat2);
double num3 = d - num2;
double num4 = Rad(lng1) - Rad(lng2);
double num5 = 2.0 * Math.Asin(Math.Sqrt(Math.Pow(Math.Sin(num3 / 2.0), 2.0) + ((Math.Cos(d) * Math.Cos(num2)) * Math.Pow(Math.Sin(num4 / 2.0), 2.0))));
num5 *= (gs == GaussSphere.WGS84) ? 6378137.0 : ((gs == GaussSphere.Xian80) ? 6378140.0 : 6378245.0);
return (Math.Round((double)(num5 * 10000.0)) / 10000.0);
}
public static string FormatJWD(double pJWD)
{
int num = (int)pJWD;
double num2 = (pJWD - num) * 60.0;
int num3 = (int)num2;
num2 = (num2 - num3) * 60.0;
int num4 = (int)num2;
return string.Concat(new object[] { num, "\x00b0", num3, "'", num4, "\"" });
}
public static string FormatJWDEx(double pJWD)
{
int num = (int)pJWD;
double num2 = (pJWD - num) * 60.0;
int num3 = (int)num2;
num2 = (num2 - num3) * 60.0;
int num4 = (int)num2;
return string.Concat(new object[] { num, " ", num3, " ", num4, " " });
}
public static string FormatSpatialReference(ISpatialReference sr)
{
try
{
if (sr == null)
{
return "";
}
StringBuilder builder = new StringBuilder();
if (sr is UnknownCoordinateSystemClass)
{
builder.Append("UnknownCoordinateSystem");
}
else
{
if (sr.Name == "Unknown")
{
builder.Append("UnknownCoordinateSystem");
}
else
{
IGeographicCoordinateSystem system2;
if (sr is IProjectedCoordinateSystem)
{
Exception exception;
IProjectedCoordinateSystem system = sr as IProjectedCoordinateSystem;
builder.Append(" :
");
builder.Append(" Name:").Append(system.Name).Append("
");
builder.Append(" Alias:").Append(system.Alias).Append("
");
builder.Append(" Abbreviation:").Append(system.Abbreviation).Append("
");
builder.Append(" Remarks:").Append(system.Remarks).Append("
");
builder.Append(" :").Append(system.Projection.Name).Append("
");
builder.Append(" :
");
builder.Append(" False_Easting:").Append(system.FalseEasting).Append("
");
builder.Append(" False_Northing:").Append(system.FalseNorthing).Append("
");
builder.Append(" Central_Meridian:").Append(system.get_CentralMeridian(true)).Append("
");
try
{
builder.Append(" Scale_Factor:").Append(system.ScaleFactor).Append("
");
}
catch { }
builder.Append(" Latitude_Of_Origin:0
");
builder.Append("Linear Unit:").Append(system.CoordinateUnit.Name).Append("(").Append(system.CoordinateUnit.MetersPerUnit).Append(")
");
builder.Append("Geographic Coordinate System:
");
system2 = system.GeographicCoordinateSystem;
builder.Append(" Name:").Append(system2.Name).Append("
");
builder.Append(" Alias:").Append(system2.Alias).Append("
");
builder.Append(" Abbreviation:").Append(system2.Abbreviation).Append("
");
builder.Append(" Remarks:").Append(system2.Remarks).Append("
");
builder.Append(" Angular Unit:").Append(system2.CoordinateUnit.Name).Append("(").Append(system2.CoordinateUnit.RadiansPerUnit).Append(")
");
builder.Append(" Prime Meridian:").Append(system2.PrimeMeridian.Name).Append("(").Append(system2.PrimeMeridian.Longitude).Append(")
");
builder.Append(" Datum:").Append(system2.Datum.Name).Append("
");
builder.Append(" Spheroid:").Append(system2.Datum.Spheroid.Name).Append("
");
builder.Append(" Semimajor Axis:").Append(system2.Datum.Spheroid.SemiMajorAxis).Append("
");
builder.Append(" Semiminor Axis:").Append(system2.Datum.Spheroid.SemiMinorAxis).Append("
");
builder.Append(" Inverse Flattening:").Append((double)(1.0 / system2.Datum.Spheroid.Flattening)).Append("
");
builder.Append("X/Y Domain:
");
try
{
double num = 0.0;
double num2 = 0.0;
double num3 = 0.0;
double num4 = 0.0;
double num5 = 0.0;
sr.GetDomain(out num, out num3, out num2, out num4);
sr.GetFalseOriginAndUnits(out num, out num2, out num5);
builder.Append(" Min X:").Append(num).Append("
");
builder.Append(" Min Y:").Append(num2).Append("
");
builder.Append(" Max X:").Append(num3).Append("
");
builder.Append(" Max Y:").Append(num4).Append("
");
builder.Append(" XYScale:").Append(num5).Append("
");
builder.Append("
");
}
catch (Exception exception1)
{
exception = exception1;
}
builder.Append("Z Domain:
");
try
{
double num6;
double num7;
double num8 = 0.0;
sr.GetZDomain(out num6, out num7);
sr.GetZFalseOriginAndUnits(out num6, out num8);
builder.Append(" Min Z:").Append(num6).Append("
");
builder.Append(" Max Z:").Append(num7).Append("
");
builder.Append(" ZScale:").Append(num8).Append("
");
builder.Append("
");
}
catch (Exception exception2)
{
exception = exception2;
}
try
{
double num9;
double num10;
builder.Append("M Domain:
");
double num11 = 0.0;
sr.GetMDomain(out num9, out num10);
sr.GetMFalseOriginAndUnits(out num9, out num11);
builder.Append(" Min M:").Append(num9).Append("
");
builder.Append(" Max M:").Append(num10).Append("
");
builder.Append(" MScale:").Append(num11).Append("
");
}
catch (Exception exception3)
{
exception = exception3;
}
}
else if (sr is IGeographicCoordinateSystem)
{
builder.Append("Geographic Coordinate System:
");
system2 = sr as IGeographicCoordinateSystem;
builder.Append(" Name:").Append(system2.Name).Append("
");
builder.Append(" Alias:").Append(system2.Alias).Append("
");
builder.Append(" Abbreviation:").Append(system2.Abbreviation).Append("
");
builder.Append(" Remarks:").Append(system2.Remarks).Append("
");
builder.Append(" Angular Unit:").Append(system2.CoordinateUnit.Name).Append("(").Append(system2.CoordinateUnit.RadiansPerUnit).Append(")
");
builder.Append(" Prime Meridian:").Append(system2.PrimeMeridian.Name).Append("(").Append(system2.PrimeMeridian.Longitude).Append(")
");
builder.Append(" Datum:").Append(system2.Datum.Name).Append("
");
builder.Append(" Spheroid:").Append(system2.Datum.Spheroid.Name).Append("
");
builder.Append(" Semimajor Axis:").Append(system2.Datum.Spheroid.SemiMajorAxis).Append("
");
builder.Append(" Semiminor Axis:").Append(system2.Datum.Spheroid.SemiMinorAxis).Append("
");
builder.Append(" Inverse Flattening:").Append((double)(1.0 / system2.Datum.Spheroid.Flattening)).Append("
");
}
}
}
return builder.ToString();
}
catch (Exception ex)
{ return ""; }
}
public static void GaussToGeo(double y, double x, short DH, out double L, out double B, double LP)
{
double num9 = 3.14159265358979;
double num10 = 0.0067385254147;
double num11 = 6399698.90178271;
double num8 = (x / 1000000.0) - 3.0;
double num6 = (((((27.11115372595 + (9.02468257083 * num8)) - (0.00579740442 * Math.Pow(num8, 2.0))) - (0.00043532572 * Math.Pow(num8, 3.0))) + (4.857285E-05 * Math.Pow(num8, 4.0))) + (2.15727E-06 * Math.Pow(num8, 5.0))) - (1.9399E-07 * Math.Pow(num8, 6.0));
double num2 = Math.Tan((num6 * num9) / 180.0);
double num7 = num10 * Math.Pow(Math.Cos((num6 * num9) / 180.0), 2.0);
double num3 = (y * Math.Sqrt(1.0 + num7)) / num11;
double num5 = num6 - ((((1.0 + num7) * num2) / num9) * (((90.0 * Math.Pow(num3, 2.0)) - ((7.5 * (((5.0 + (3.0 * Math.Pow(num2, 2.0))) + num7) - ((9.0 * num7) * Math.Pow(num2, 2.0)))) * Math.Pow(num3, 4.0))) + ((0.25 * ((61.0 + (90.0 * Math.Pow(num2, 2.0))) + (45.0 * Math.Pow(num2, 4.0)))) * Math.Pow(num3, 6.0))));
double num4 = (((180.0 * num3) - ((30.0 * ((1.0 + (2.0 * Math.Pow(num2, 2.0))) + num7)) * Math.Pow(num3, 3.0))) + ((1.5 * ((5.0 + (28.0 * Math.Pow(num2, 2.0))) + (24.0 * Math.Pow(num2, 4.0)))) * Math.Pow(num3, 5.0))) / (num9 * Math.Cos((num6 * num9) / 180.0));
double num = num4 * 3600.0;
if (LP == -1000.0)
{
L = (((DH * 6) - 3) * 3600.0) + num;
}
else
{
L = (LP * 3600.0) + num;
}
B = num5 * 3600.0;
}
public static void GeoToGauss(double jd, double wd, short DH, short DH_width, out double y, out double x, double LP)
{
double num2;
double num12 = 3.14159265358979;
double num13 = 0.0067385254147;
double num14 = 6399698.90178271;
double num4 = ((jd / 3600.0) * num12) / 180.0;
double a = ((wd / 3600.0) * num12) / 180.0;
if (LP == -1000.0)
{
num2 = (DH - 0.5) * DH_width;
}
else
{
num2 = LP;
}
double num3 = (jd / 3600.0) - num2;
double num10 = Math.Sin(a);
double num11 = Math.Cos(a);
double num8 = (30.870794749999998 * wd) - (((((32005.7799 * num10) + (133.9238 * Math.Pow(num10, 3.0))) + (0.6976 * Math.Pow(num10, 5.0))) + (0.0039 * Math.Pow(num10, 7.0))) * num11);
double num6 = num13 * Math.Pow(num11, 2.0);
double num7 = num14 / Math.Sqrt(1.0 + num6);
double num = Math.Tan(a);
double num9 = ((num12 / 180.0) * num3) * num11;
x = num8 + ((num7 * num) * (((0.5 * Math.Pow(num9, 2.0)) + (((((5.0 - Math.Pow(num, 2.0)) + (9.0 * num6)) + (4.0 * Math.Pow(num6, 2.0))) * Math.Pow(num9, 4.0)) / 24.0)) + ((((61.0 - (58.0 * Math.Pow(num, 2.0))) + Math.Pow(num, 4.0)) * Math.Pow(num9, 6.0)) / 720.0)));
y = num7 * ((num9 + ((((1.0 - Math.Pow(num, 2.0)) + num6) * Math.Pow(num9, 3.0)) / 6.0)) + ((((((5.0 - (18.0 * Math.Pow(num, 2.0))) + Math.Pow(num, 4.0)) + (14.0 * num6)) - ((58.0 * num6) * Math.Pow(num, 2.0))) * Math.Pow(num9, 5.0)) / 120.0));
}
private void GKTransform(double x, double y, ref double B, ref double L, double center, int n)
{
double num = (y - 500000.0) - (0xf4240 * n);
double a = 1.57048687472752E-07 * x;
double num4 = Math.Sin(a);
double num2 = a + (Math.Cos(a) * ((((0.00505250559291393 * num4) - (2.98473350966158E-05 * Math.Pow(num4, 3.0))) + (2.41627215981336E-07 * Math.Pow(num4, 5.0))) - (2.22241909461273E-09 * Math.Pow(num4, 7.0))));
double num6 = Math.Tan(num2);
double num8 = 0.00669438499958795 * Math.Pow(Math.Cos(num2), 2.0);
double num5 = Math.Sqrt(1.0 + num8);
double num7 = 6399596.65198801 / num5;
double num10 = num / num7;
double num9 = Math.Pow(num5, 2.0) * num6;
double num11 = Math.Pow(num6, 2.0);
B = ((num2 - ((num9 * Math.Pow(num10, 2.0)) / 2.0)) + ((((((5.0 + (3.0 * num11)) + num8) - ((9.0 * num8) * num11)) * num9) * Math.Pow(num10, 4.0)) / 24.0)) - (((((61.0 + (90.0 * num11)) + (45.0 * Math.Pow(num11, 2.0))) * num9) * Math.Pow(num10, 6.0)) / 720.0);
double num13 = 1.0 / Math.Cos(num2);
L = (((num13 * num10) - (((((1.0 + (2.0 * num11)) + num8) * num13) * Math.Pow(num10, 3.0)) / 6.0)) + (((((((5.0 + (28.0 * num11)) + (24.0 * Math.Pow(num11, 2.0))) + (6.0 * num8)) + ((8.0 * num8) * num11)) * num13) * Math.Pow(num10, 5.0)) / 120.0)) + center;
}
public static IPoint JWD2XY(IPoint pJWDPoint, int gcsType, int pcsType)
{
try
{
ISpatialReferenceFactory factory = new SpatialReferenceEnvironmentClass();
pJWDPoint.SpatialReference = factory.CreateGeographicCoordinateSystem(gcsType);
pJWDPoint.Project(factory.CreateProjectedCoordinateSystem(pcsType));
return pJWDPoint;
}
catch
{
return null;
}
}
private static double Rad(double d)
{
return ((d * 3.1415926535897931) / 180.0);
}
public static IPoint XY2JWD(double x, double y, int gcsType, int pcsType)
{
try
{
IPoint point = new PointClass();
point.PutCoords(x, y);
ISpatialReferenceFactory factory = new SpatialReferenceEnvironmentClass();
point.SpatialReference = factory.CreateProjectedCoordinateSystem(pcsType);
point.Project(factory.CreateGeographicCoordinateSystem(gcsType));
return point;
}
catch
{
return null;
}
}
public static IPoint XY2JYD(ISpatialReference aSR, IPoint pXY)
{
IPoint point = new PointClass();
point = (pXY as IClone).Clone() as IPoint;
if (aSR == null)
{
return point;
}
if (aSR.Name!= "Unknown")
{
point.SpatialReference = aSR;
point.SnapToSpatialReference();
if (aSR is IProjectedCoordinateSystem)
{
IGeographicCoordinateSystem system = (aSR as IProjectedCoordinateSystem).GeographicCoordinateSystem;
point.Project(system);
}
return point;
}
return null;
}
// Nested Types
public enum GaussSphere
{
Beijing54,
Xian80,
WGS84
}
public static ISpatialReference SelectSR(String pFolderPath)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "ESRI (*.prj)|*.prj";
ofd.Title = " ESRI ";
ofd.Multiselect = false;
if (pFolderPath != null &&
Directory.Exists(pFolderPath))
{
ofd.InitialDirectory = pFolderPath;
}
if (ofd.ShowDialog() == DialogResult.OK)
{
string filePath = ofd.FileName;
return ReadSR(filePath);
}
else return null;
}
public static ISpatialReference ReadSR(string pPrjFilePath)
{
if (File.Exists(pPrjFilePath))
{
StreamReader aReader = new StreamReader(pPrjFilePath);
string aLine = aReader.ReadToEnd();
aReader.Close();
int byteCount = 0;
if (aLine.StartsWith("GEOGCS"))
{
GeographicCoordinateSystemClass sr = new GeographicCoordinateSystemClass();
(sr as IESRISpatialReference).ImportFromESRISpatialReference(aLine, out byteCount);
return sr;
}
else
{
ProjectedCoordinateSystemClass sr = new ProjectedCoordinateSystemClass();
(sr as IESRISpatialReference).ImportFromESRISpatialReference(aLine, out byteCount);
return sr;
}
}
else
{
return null;
}
}
}
