Get latitude/longitude coordinates for NSWE corners from a center point 800ft out to each NSWE corner. For example lets say I have: Latitude: 43.953282 Longitude: -123.991699 The above would be considered my center point. And now I need to determine the latitude and longitude points from center point 800ft outward to each NSWE corners. So I would have a central long/lat, N, S, E and W long/lat.. So I would end up with 4 additional lat/long pairs. What I am trying to resolve is a formula, preferably that can be done on a standard calculator to determine these 4 NSWE points based on the central point.