如何找到openlayers中兩個標記之間的距離？

Question

嗨，我想知道如何找到openlayers中兩個標記之間的距離。

var distance = distanceBetweenMarkers(latLon1, latLon2){ 
//code to find the distance between latLon1, latLon2 

} 

pleae幫我...

Answer 1

創建一個從您的LonLat分和Geometry.Point調用distanceTo方法[1]。

p1 = new OpenLayers.Geometry.Point(latLon1.lon,latLon1.lat); 
p2 = new OpenLayers.Geometry.Point(latLon2.lon,latLon2.lat); 
len = p1.distanceTo(p2); 

1 - http://dev.openlayers.org/docs/files/OpenLayers/Geometry/Point-js.html#OpenLayers.Geometry.Point.distanceTo