Calculating length of line segment for a given zoom level

Topics: General
Oct 24, 2011 at 10:55 AM


Is it possible to calculate the length of a line segment given a specific zoom level? Say that I have a point at lat/long and would like to draw a line with a heading of 250 degrees and a length corresponding to 20km. What would be the "new" lat/long coordinate given those figures?

Many thanks in advance!!!