OpenLayers Adjusting Coordinates To 0,0

Question

To be blunt, I'm new to OpenLayers. I have a database of WGS84 coordinates which I've loaded into a database. I've verified that this works by echoing latitudes and longitudes.

map = new OpenLayers.Map("map");
var mapnik = new OpenLayers.Layer.OSM();
map.addLayer(mapnik);
map.setCenter(new OpenLayers.LonLat(<?php echo $lat;?>, <?php echo $lon;?>).transform(
   new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
   new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection
), 4 /*Zoom level*/);

When putting into here, it moves the map to 0,0. Can anyone help or point me in the right direction?

Where are you setting `$lat` and `$long`? It would help to see that... — Alex, Oct 20 '11 at 00:21
Your Lat&Lon values either not set or not in 4326 projection.What about their values? — Myra, Oct 20 '11 at 06:32
Is the order of your coordinates correct? Your arguments are $Lat,$Lon, while OpenLayer.LonLat, expects $Lon,$Lat. — Niels, Oct 20 '11 at 07:45
I have the same problem see [Position][1] [1]: http://stackoverflow.com/questions/20346172/openlayers-after-call-setcenter-map-is-still-on-0-0-position — Musketyr, Dec 09 '13 at 14:09

score 0 · Answer 1 · answered May 03 '14 at 20:02

The commend by @Niels is correct.
The OpenLayers LonLat object expects (longitude, latitude) - not (latitude, longitude).

Just swap the order of your lat and lon:

map.setCenter(new OpenLayers.LonLat(<?php echo $lon;?>, <?php echo $lat;?>).transform(
    new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
    new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection
), 4);

OpenLayers Adjusting Coordinates To 0,0

1 Answers1