Skip to content

Instantly share code, notes, and snippets.

@tmountain

tmountain/gist:cc7e8a2a0eb861fe9e1e

Created April 6, 2015 20:22
Show Gist options
  • Save tmountain/cc7e8a2a0eb861fe9e1e to your computer and use it in GitHub Desktop.
Save tmountain/cc7e8a2a0eb861fe9e1e to your computer and use it in GitHub Desktop.
Download ZIP
Raw
gistfile1.js
function arePointsNear(checkPoint, centerPoint, km) {
var ky = 40000 / 360;
var kx = Math.cos(Math.PI * centerPoint.lat / 180.0) * ky;
var dx = Math.abs(centerPoint.lng - checkPoint.lng) * kx;
var dy = Math.abs(centerPoint.lat - checkPoint.lat) * ky;
return Math.sqrt(dx * dx + dy * dy) <= km;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment