u need to go on a long distance and then ask the judge for the judgment….
and it will be tested as the judge will call the doctor…
if you are talking about bigger distances you can do so by using tall landmarks. if you know how tall a landmark is you can measure how many degrees a line from you to the top of the landmark is. once you have done that you can calculate the distance to the object.
another option for even larger distances is using a map and measuring the distance on the map.
so first you have to guess and then you will have to measure to see if you are right.