public static double GetDistance(double fromLat, double fromLng, double toLat, double toLng)
{
Point ptFrom = Context.MakePoint(fromLng, fromLat);
Point ptTo = Context.MakePoint(toLng, toLat);
return(Context.GetDistCalc().Distance(ptFrom, ptTo));
}
public static double GetDistance(double fromLat, double fromLng, double toLat, double toLng)
{
Point ptFrom = Context.MakePoint(fromLng, fromLat);
Point ptTo = Context.MakePoint(toLng, toLat);
var distance = Context.GetDistCalc().Distance(ptFrom, ptTo);
return((distance / RadiansToDegrees) * EarthMeanRadiusKm);
}
public static double GetGeographicalDistance(double fromLat, double fromLng, double toLat, double toLng)
{
var Context = new NtsSpatialContext(true);
Point ptFrom = Context.MakePoint(fromLng, fromLat);
Point ptTo = Context.MakePoint(toLng, toLat);
var distance = Context.GetDistCalc().Distance(ptFrom, ptTo);
return((distance / RadiansToDegrees) * EarthMeanRadiusKm);
}
public SpatialRelation Relate(Point pt)
{
//TODO if not jtsPoint, test against bbox to avoid JTS if disjoint
var jtsPoint = (NtsPoint)(pt is NtsPoint ? pt : ctx.MakePoint(pt.GetX(), pt.GetY()));
return(geom.Disjoint(jtsPoint.GetGeom()) ? SpatialRelation.DISJOINT : SpatialRelation.CONTAINS);
}
public virtual void TestFiji()
{
//Fiji is a group of islands crossing the dateline.
string wktStr = ReadFirstLineFromRsrc("fiji.wkt.txt");
NtsSpatialContextFactory factory = new NtsSpatialContextFactory();
factory.normWrapLongitude = true;
NtsSpatialContext ctx = (NtsSpatialContext)factory.NewSpatialContext();
IShape shape = ctx.ReadShapeFromWkt(wktStr);
AssertRelation(null, SpatialRelation.CONTAINS, shape,
ctx.MakePoint(-179.99, -16.9));
AssertRelation(null, SpatialRelation.CONTAINS, shape,
ctx.MakePoint(+179.99, -16.9));
Assert.True(shape.BoundingBox.Width < 5);//smart bbox
Console.WriteLine("Fiji Area: " + shape.GetArea(ctx));
}