[OpenLayers-Users] Formatting output text

[Joel Leininger]

Well, I stuck it right after the mousemove function, and it works like a
charm. I actually embellished Bart's code a bit because we have some
coordinate systems with South and West values. Here is my final code:

OpenLayers.LonLat.prototype.toString = function()
    {
    if (this.lat < 0)
          {
          var ns = "S";
          this.lat = Math.abs(this.lat);
          }
    else {
         var ns = "N";
         }
    if (this.lon < 0)
         {
         var ew = "W";
         this.lon = Math.abs(this.lon);
         }
    else {
         var ew = "E";
         }
    return (ns + "  " + this.lat.toFixed() + ", " + ew + " " +
this.lon.toFixed());
    }

(Watch the wrap in the email on the last line.)

Add number of digits desired in the toFixed(##) function.

Thanks again, Bart. The results look great.

-J.

On Wed, 2011-08-17 at 21:25 +0000, JK Chen wrote:
>  
> 
> Where should the new code be inserted to?
> 
>  
> 
> Thanks.
> 
>  
> 
> JK
> 
> From: openlayers-users-bounces at lists.osgeo.org
> [mailto:openlayers-users-bounces at lists.osgeo.org] On Behalf Of Bart
> van den Eijnden
> Sent: Tuesday, August 16, 2011 11:28 AM
> To: Joel Leininger
> Cc: openlayers-users at lists.osgeo.org
> Subject: Re: [OpenLayers-Users] Formatting output text
> 
> 
>  
> 
> You could override the toString method of LonLat:
> 
>  
> 
> 
> OpenLayers.LonLat.prototype.toString = function() {
> 
> 
>     return ("N " + this.lat.toFixed() + ", E " + this.lon.toFixed());
> 
> 
> }
> 
> 
>  
> 
> 
> Best regards,
> 
> 
> Bart
> 
>  
> 
> -- 
> Bart van den Eijnden
> OSGIS - http://osgis.nl
> 
> 
>  
> 
> On Aug 16, 2011, at 7:21 PM, Joel Leininger wrote:
> 
> 
> 
> 
> How do I go about reformatting the text output from a coordinate
> variable?
> 
> In other words, I have output from a mouse position which has been
> transformed into different coordinate systems, and then gets displayed
> on the screen.
> 
> It now looks something like this:
> 
> lon=414614.58552010887,lat=164066.82345258445
> 
> In reality, the values are x and y coords in feet or meters, not
> lonlat
> coords. I'd like them to look like this:
> 
> N 164066, E 414614
> 
> Note the truncation of the digits and switching of the x, y (which is
> customary in my field). Not being a JS expert, I can't figure out how
> to
> get at the variable to massage the format prior to display on the
> screen.
> 
> Here's the code leading up to the display (inside of a mousemove
> function):
> 
> mousepos = map.getLonLatFromViewPortPx(e);
> var NAD83ft_values = mousepos.clone();   // done several times for
> different coord translations
> 
> NAD83ft_values.transform(WGS84_google_mercator, NAD83ft_proj);
> document.getElementById("NAD83feet").innerHTML = NAD83ft_values;
> 
> 
> It's unpacking NAD83ft_values that has me thrown. Any help?
> 
> -J.
> 
> 
> 
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> 
> 
>  
> 
>