public LinearLocation[] IndicesOf(Geometry subLine)
{
Coordinate startPt =
((LineString)subLine.GetGeometry(0)).Coordinates[0];
LineString lastLine =
(LineString)subLine.GetGeometry(subLine.NumGeometries - 1);
Coordinate endPt = lastLine.Coordinates[lastLine.NumPoints - 1];
LocationIndexOfPoint locPt = new LocationIndexOfPoint(linearGeom);
LinearLocation[] subLineLoc = new LinearLocation[2];
subLineLoc[0] = locPt.IndexOf(startPt);
// check for case where subline is zero length
if (subLine.Length == 0.0)
{
subLineLoc[1] = subLineLoc[0].Clone();
}
else
{
subLineLoc[1] = locPt.IndexOfAfter(endPt, subLineLoc[0]);
}
return(subLineLoc);
}
public static LinearLocation IndexOf(Geometry linearGeom,
Coordinate inputPt)
{
LocationIndexOfPoint locater = new LocationIndexOfPoint(linearGeom);
return(locater.IndexOf(inputPt));
}
/// <summary> Computes the index for the closest point on the line to the given point.
/// If more than one point has the closest distance the first one along the line
/// is returned.
/// (The point does not necessarily have to lie precisely on the line.)
///
/// </summary>
/// <param name="pt">a point on the line
/// </param>
/// <returns> the index of the point
/// </returns>
public LinearLocation Project(Coordinate pt)
{
return(LocationIndexOfPoint.IndexOf(linearGeom, pt));
}
