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It is important to note that you can grab the nearest coordinate or the nearest vertex of the route from the geometry engine... You didn't specify if you were using Swift or Objective-C, but here is some untested Swift code to search a given route for the closest coordinate to a given point and then display it as a graphic: import UIKit import ArcGIS ...


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ArcGIS has something that can be used. AGSGeometryEngine nearestCoordinateInGeometry:toPoint:. But still a long way to go.



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