Perspective Range Finder

1. Place A at a nearest starting base point.

2. Place B at a near point with a known distance away from A and set its distance.

3. Place C at the target.

4. Place D at a far point with a known distance away from A and set its distance OR place D at the horizon and set the distance to zero.

5. The distance to target C will be displayed.

A B C D: Draggable perspective points

 - - - : Toggle perspective lines on and off

  ~.~  : Measure a scene using your camera

   :)  : Measure a scene from a selected image

  / \  : Tilt an image to level the scene

  + -  : Zoom an image in and out

ARROWS : Move an image to adjust the scene

You must know the distance of at least two points in a scene. Whatever units that distance is, (ie inches, feet, yards, miles, meters, kilometers, etc.) will be the units.