[OpenLayers-Users] strange request strings

[Jay Douillard]

Thanks Chris,

Rounding the bounding box and resolution to an integer solved the problem.


----
Jay

----- Original Message -----
From: "Christopher Schmidt" <crschmidt at metacarta.com>
To: "Jay Douillard" <jay.douillard at ubc.ca>
Cc: "OpenLayers Mailing List" <users at openlayers.org>
Sent: Friday, February 27, 2009 11:20:53 AM GMT -08:00 US/Canada Pacific
Subject: Re: [OpenLayers-Users] strange request strings

On Fri, Feb 27, 2009 at 10:09:33AM -0800, Jay Douillard wrote:
> Correct, I'm using EPSG 3005... Is there any kludge to get around this problem? and If not, where is this issue in the source, I'll take a look. 
> Thanks!

I think the ticket explains? Specifically, it's a rounding error issue.
intersectsBounds does a check to see if two bounding boxes overlap, and
they do, even when they shouldn't.

A workaround might be to try putting your bbox and maxResolution into
integers. I think that would avoid th floating point issues. (If you
can't figure out how, you can share your maxExtent and maxResolution
with the list and someone might try to help.)

-- Chris

> 
> ----
> Jay 
> 
> ----- Original Message -----
> From: "Christopher Schmidt" <crschmidt at metacarta.com>
> To: "Jay Douillard" <jay.douillard at ubc.ca>
> Cc: "OpenLayers Mailing List" <users at openlayers.org>
> Sent: Thursday, February 26, 2009 4:54:51 PM GMT -08:00 US/Canada Pacific
> Subject: Re: [OpenLayers-Users] strange request strings
> 
> On Thu, Feb 26, 2009 at 03:59:03PM -0800, Jay Douillard wrote:
> > Hello, using OL 2.7 I keep having slow loading of pre-rendered tiles (made with tilecache). When I looked at the requests with firebug I can see that OL is requesting strange images, that shouldn't exist, and getting 404 errors. 
> > The requested URL is:
> 
> I'm assuming you're using a non-default projection. If so, this is
> likely http://trac.openlayers.org/ticket/1951.
> 
> -- Chris
> 
> >  /cache/sdlabels/03/000/000/009/000/000/0-1.png
> > 
> > Code snippet:
> >  
> > sd_labels = new OpenLayers.Layer.TileCache("SD Labels",
> >                 "/cache/","sdlabels", {               
> >                     type: "image/png",
> >                     isBaseLayer:false
> >                     });
> > 
> > I'm also getting these on TMS layers:
> > 
> > cache/edi_w2/03/000/000/000/-01/999/999.png.lck
> > 
> > 
> > Seems I'm getting a - in place of a zero?!
> > Thanks!
> > 
> > 
> > ----
> > Jay 
> > 
> > 
> > _______________________________________________
> > Users mailing list
> > Users at openlayers.org
> > http://openlayers.org/mailman/listinfo/users
> 
> -- 
> Christopher Schmidt
> MetaCarta

-- 
Christopher Schmidt
MetaCarta