Latitude and longitude of points on a line How could you get the latitude and longitude of four points (equal distance apart) on a line from $(27,-82)$ to $(28,-81)$? The four points should split the line into 5 parts.


The simplest is to plot $(27,-82)$ and $(28,-81)$ on your map using whatever projection you have, split the difference in pixel count into five, and plot the points that produces.  That will produce a straight line on your display, which may be what you want.  If you want something else, you have to define what route you want.  It could be a great circle, which is the shortest distance.  It could be the rhumb line, which maintains a constant bearing.  Or it could be some others.
