function findNearestWaypoint($lat, $lon)
{
global $waypoints;
$point = new GpsPoint();
$point->setLat($lat);
$point->setLon($lon);
if (count($waypoints) == 0) {
$waypoints = getWaypoints();
}
$nearestID = 0;
$minDistance = 1000000;
foreach ($waypoints as $waypoint) {
$distance = $point->calcDistance($waypoint);
if ($distance < $minDistance) {
$minDistance = $distance;
$nearestID = $waypoint->waypointID;
}
}
return array($nearestID, $minDistance);
}
