private int GetSridFromAuthorityNode(EsriPrjTreeNode authorityNode)
{
int srid = 0;
if (authorityNode?.Values?.Count == 2 && authorityNode?.Values?[0] == _epsg)
{
int.TryParse(authorityNode.Values[1], out srid);
}
return(srid);
}
public EsriPrjFile(EsriPrjTreeNode root)
{
this._root = root;
//sample: AUTHORITY["EPSG", "4326"]
//var authorityInfo = root.Children.SingleOrDefault(i => i.Name == _authority)?.Values;
//int srid = 0;
//if (authorityInfo != null && authorityInfo.Count == 2 && authorityInfo?[0] == _epsg)
//{
// int.TryParse(authorityInfo[1], out srid);
//}
this._srid = GetCrsSrid();
}
public EsriPrjTreeNode(IRI.Msh.CoordinateSystem.IEllipsoid ellipsoid, string title, int srid)
{
this.Name = EsriPrjFile._geogcs;
this.Values = new List <string>()
{
title ?? $"GCS_{ellipsoid.EsriName}"
};
//esri write zero for Inverse Flattening of shperes!
var inverseFlattening = double.IsInfinity(ellipsoid.InverseFlattening) ? 0 : ellipsoid.InverseFlattening;
var spheroid = new EsriPrjTreeNode(EsriPrjFile._spheroid, ellipsoid.EsriName, ellipsoid.SemiMajorAxis.Value.AsExactString(), inverseFlattening.AsExactString());
var datum = new EsriPrjTreeNode(EsriPrjFile._datum, $"D_{ellipsoid.EsriName}")
{
Children = new List <EsriPrjTreeNode>()
{
spheroid
}
};
var primem = new EsriPrjTreeNode(EsriPrjFile._primem, EsriPrjFile._greenwich, "0.0");
var unit = new EsriPrjTreeNode(EsriPrjFile._unit, EsriPrjFile._degree, EsriPrjFile._degreeValue);
this.Children = new List <EsriPrjTreeNode>()
{
datum, primem, unit
};
if (srid != 0)
{
var authority = new EsriPrjTreeNode(EsriPrjFile._authority, EsriPrjFile._epsg, srid.ToString());
this.Children.Add(authority);
}
}
public static EsriPrjFile Parse(string esriWktPrj)
{
return(new EsriPrjFile(EsriPrjTreeNode.Parse(esriWktPrj)));
}
public EsriPrjFile(string prjFileName)
{
this._root = EsriPrjTreeNode.Parse(System.IO.File.ReadAllText(prjFileName));
this._srid = GetCrsSrid();
}
