private static void ConvertToProjected(ProjectionInfo dest, double[][] points, int startIndex, int numPoints)
{
double frmMeter = 1 / dest.Unit.Meters;
bool geoc = dest.Geoc;
double lam0 = dest.GetLam0();
double roneEs = 1 / (1 - dest.GeographicInfo.Datum.Spheroid.EccentricitySquared());
bool over = dest.Over;
double x0 = 0;
double y0 = 0;
if (dest.FalseEasting != null)
{
x0 = dest.FalseEasting.Value;
}
if (dest.FalseNorthing != null)
{
y0 = dest.FalseNorthing.Value;
}
double a = dest.GeographicInfo.Datum.Spheroid.EquatorialRadius;
for (int i = startIndex; i < numPoints; i++)
{
double[] lp = points[i];
double t = Math.Abs(lp[1] - Math.PI / 2);
if (t < Eps || Math.Abs(lp[0]) > 10)
{
lp[X] = double.PositiveInfinity;
lp[Y] = double.PositiveInfinity;
continue;
}
if (Math.Abs(t) <= Eps)
{
lp[Phi] = lp[Phi] < 0 ? -Math.PI / 2 : Math.PI / 2;
}
else if (geoc)
{
lp[Phi] = Math.Atan(roneEs * Math.Tan(lp[Phi]));
}
lp[Lam] -= lam0;
if (!over)
{
lp[Lam] = Adjlon(lp[Lam]);
}
}
// break this out because we don't want a chatty call to extension transforms
dest.Transform.Forward(points, startIndex, numPoints);
for (int i = startIndex; i < numPoints; i++)
{
points[i][X] = frmMeter * (a * points[i][X] + x0);
points[i][Y] = frmMeter * (a * points[i][Y] + y0);
}
}
/// <summary>
/// Initializes the transform using the parameters from the specified coordinate system information
/// </summary>
/// <param name="projInfo">A ProjectionInfo class contains all the standard and custom parameters needed to initialize this transform</param>
protected override void OnInit(ProjectionInfo projInfo)
{
/* read some Parameters,
* here Latitude Truescale */
double ts = 0;
if (projInfo.StandardParallel1 != null)
{
ts = projInfo.StandardParallel1.Value * Math.PI / 180;
}
_C_x = ts;
/* we want Bessel as fixed ellipsoid */
A = 6377397.155;
E = Math.Sqrt(Es = 0.006674372230614);
/* if latitude of projection center is not set, use 49d30'N */
Phi0 = projInfo.LatitudeOfOrigin != null?projInfo.GetPhi0() : 0.863937979737193;
/* if center long is not set use 42d30'E of Ferro - 17d40' for Ferro */
/* that will correspond to using longitudes relative to greenwich */
/* as input and output, instead of lat/long relative to Ferro */
Lam0 = projInfo.CentralMeridian != null?projInfo.GetLam0() : 0.7417649320975901 - 0.308341501185665;
/* if scale not set default to 0.9999 */
K0 = projInfo.CentralMeridian != null?projInfo.GetLam0() : 0.9999;
if (!projInfo.Parameters.ContainsKey("czech"))
{
return;
}
int temp = projInfo.ParamI("czech");
if (temp != 0)
{
_czech = true;
}
}
/// <summary>
/// Initializes the parameters from the projection info
/// </summary>
/// <param name="proj">The projection information used to control this transform</param>
public void Init(ProjectionInfo proj)
{
// Setup protected values common to all the projections that inherit from this projection
Es = proj.GeographicInfo.Datum.Spheroid.EccentricitySquared();
if (proj.LatitudeOfOrigin != null)
{
Phi0 = proj.GetPhi0();
}
if (proj.CentralMeridian != null)
{
Lam0 = proj.GetLam0();
}
if (proj.FalseEasting != null)
{
X0 = proj.FalseEasting.Value;
}
if (proj.FalseNorthing != null)
{
Y0 = proj.FalseNorthing.Value;
}
K0 = proj.ScaleFactor;
A = proj.GeographicInfo.Datum.Spheroid.EquatorialRadius;
E = proj.GeographicInfo.Datum.Spheroid.Eccentricity();
Ra = 1 / A;
OneEs = 1 - Es;
ROneEs = 1 / OneEs;
ToMeter = 1;
FromMeter = 1;
//_datumParams = proj.GeographicInfo.Datum.ToWGS84;
if (proj.Unit != null)
{
ToMeter = proj.Unit.Meters;
FromMeter = 1 / proj.Unit.Meters;
}
if (Es != 0)
{
IsElliptical = true;
}
OnInit(proj);
}