nearestPointOnLine   
  fun nearestPointOnLine(line: LineString, point: Position, units: Units = Units.Kilometers): Feature<Point>
Finds the closest Position along a LineString to a given position
Return
Feature with Feature.properties:
Parameters
line
The LineString to find a position along
point
The Position given to find the closest point along the line
fun nearestPointOnLine(lines: MultiLineString, point: Position, units: Units = Units.Kilometers): Feature<Point>
Finds the closest Position along a MultiLineString to a given position
Return
Feature with Feature.properties:
Parameters
lines
The MultiLineString to find a position along
point
The Position given to find the closest point along the lines