How to find out the coordinates on a polyine by specifying the length?

Question

Google Maps

For example, there is a set of coordinates for a line. And you need to make sure that there are markers along the line every, for example, 100m. Thanks in advance

Answer 1

Come on, what are you, a kind of triangles, I suppose the 6th grade. If the hypotenuse is 2 times less (half the way), then the legs are 2 times less (the coordinates of the points).
Those. if you have a vector length of 100 and you need to postpone 20 along it, then X \u003d X1 + (X2-X1) * (20/100).
Also, do not forget that degrees (in which coordinates) are not equal to meters.