javascript - Add milestones (markers) every x Km on direction -

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i want add marker every 5 or 10 kilometer on polylines of direction given google maps api. :

http://www.geocodezip.com/v3_polyline_example_kmmarkers_0.html

but google direction's

given start point, initial bearing, , distance, calculate destination point , final bearing travelling along (shortest distance) great circle arc.

var lat2 = math.asin( math.sin(lat1)*math.cos(d/r) +                math.cos(lat1)*math.sin(d/r)*math.cos(brng) ); var lon2 = lon1 + math.atan2(math.sin(brng)*math.sin(d/r)*math.cos(lat1),                       math.cos(d/r)-math.sin(lat1)*math.sin(lat2));

the radius of earth (r) 6371000 meters. brng direction travelling in degrees (0 = north).

then use function add markers map

function setmarkers(map, locations) {   // add markers map    // marker sizes expressed size of x,y   // origin of image (0,0) located   // in top left of image.    // origins, anchor positions , coordinates of marker   // increase in x direction right , in   // y direction down.   var image = {     url: 'images/beachflag.png',     // marker 20 pixels wide 32 pixels tall.     size: new google.maps.size(20, 32),     // origin image 0,0.     origin: new google.maps.point(0,0),     // anchor image base of flagpole @ 0,32.     anchor: new google.maps.point(0, 32)   };   var shadow = {     url: 'images/beachflag_shadow.png',     // shadow image larger in horizontal dimension     // while position , offset same main image.     size: new google.maps.size(37, 32),     origin: new google.maps.point(0,0),     anchor: new google.maps.point(0, 32)   };   // shapes define clickable region of icon.   // type defines html <area> element 'poly'   // traces out polygon series of x,y points. final   // coordinate closes poly connecting first   // coordinate.   var shape = {       coord: [1, 1, 1, 20, 18, 20, 18 , 1],       type: 'poly'   };   (var = 0; < locations.length; i++) {     var beach = locations[i];     var mylatlng = new google.maps.latlng(beach[1], beach[2]);     var marker = new google.maps.marker({         position: mylatlng,         map: map,         shadow: shadow,         icon: image,         shape: shape,         title: beach[0],         zindex: beach[3]     });   } }

edit function have proper marker icons , call each marker want place.


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