[OpenLayers-Users] weird thing with projections

Sat Apr 18 14:43:45 EDT 2009

Hi,

toni hernández wrote:
> I need to reproject a point to a pre-defined projection 
> (Proj4js.defs["EPSG:23031"] = "+proj=utm +zone=31 +ellps=intl +units=m 
> +no_defs ";).
> The weird thing is that the projection is not working unless I insert 
> and alert("stop for a while") after the line p = new 
> OpenLayers.Projection('EPSG:23031');
>
> Without the stop alert the point is shown in 4326 projection.
> Isn't it weird?
>
> Any ideas.
> I'm lost.
>
>     <script src="../proj4js/lib/defs/EPSG23031.js"></script>

Don't load the above.

>     <script src="../proj4js/lib/proj4js.js"></script>
>     <script src="../lib/OpenLayers.js"></script>   
> <script type="text/javascript">
> function init()
> {

// Instead, add here:

Proj4js.defs["EPSG:23031"] = "+proj=utm +zone=31 +ellps=intl +units=m 
+no_defs ";

>            p = new OpenLayers.Projection('EPSG:23031');
> //alert("stop for a while");
>             var proj = new OpenLayers.Projection("EPSG:4326");
>             var point = new OpenLayers.LonLat(-71, 42);
>             alert(point.transform(proj, p));
> }
> ...
> </script>
> <body onload=init()">
> ....
>

Regards,
Andreas.

-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.