/// <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"></param>
/// <returns></returns>
public double Project(Coordinate pt)
{
return(LengthIndexOfPoint.IndexOf(_linearGeom, pt));
}
public static double IndexOfAfter(IGeometry linearGeom, Coordinate inputPt, double minIndex)
{
var locater = new LengthIndexOfPoint(linearGeom);
return(locater.IndexOfAfter(inputPt, minIndex));
}
/// <summary>
/// Finds the index for a point on the line
/// which is greater than the given index.
/// If no such index exists, returns <paramref name="minIndex" />.
/// This method can be used to determine all indexes for
/// a point which occurs more than once on a non-simple line.
/// It can also be used to disambiguate cases where the given point lies
/// slightly off the line and is equidistant from two different
/// points on the line.
/// The supplied point does not necessarily have to lie precisely
/// on the line, but if it is far from the line the accuracy and
/// performance of this function is not guaranteed.
/// Use <see cref="Project" /> to compute a guaranteed result for points
/// which may be far from the line.
/// </summary>
/// <param name="pt">A point on the line.</param>
/// <param name="minIndex">The value the returned index must be greater than.</param>
/// <returns>The index of the point greater than the given minimum index.</returns>
/// <seealso cref="Project(Coordinate)"/>
public double IndexOfAfter(Coordinate pt, double minIndex)
{
return(LengthIndexOfPoint.IndexOfAfter(_linearGeom, pt, minIndex));
}
public static double IndexOf(IGeometry linearGeom, Coordinate inputPt)
{
var locater = new LengthIndexOfPoint(linearGeom);
return(locater.IndexOf(inputPt));
}