arcade-forms-firs-m-value

var public_transport = FeatureSetByName($map, "Zurich Public Transport")
var buffer_input = BufferGeodetic($feature, 3, "meter")
var Lines = Intersects(public_transport, buffer_input)
var closureLine = Geometry($feature).paths
var firstVert = First(closureLine[0])
var lastVert = Back(closureLine[0])
var correct_line = ''
for (var f in Lines) {
  var firstM = Round(PointToCoordinate(f, firstVert).coordinate.m,2)
  var lastM = Round(PointToCoordinate(f, lastVert).coordinate.m,2)
  if(firstM < lastM) {
    correct_line = f.Identifier
  }
}
var selectedLine = First(Filter(Lines, "Identifier = @correct_line"))
var result = Round((PointToCoordinate(selectedLine, firstVert).coordinate.m)/1000,2)
return result