[Tilecache] An error occurred: Current x value ... is too far from tile corner x ...

[Josh Livni]

Hi Christoph,

Your tilecache config has incompatible bounds (bbox) and resolutions.  One
easy trick is see if your resolutions are evenly divisible into your extent.
 Obviously set your openlayers extent (or resolutions, whichever you change)
to match your tilecache changes.

Or if you don't want to fiddle with calculating compatible bbox/resolutions,
and you don't care about a 'custom' maxExtent on your map or in tilecache,
then just use the whole globe (as defined by spherical mercator, anyway).
 For this, the easiest way is probably just set spherical_mercator=true in
your tilecache config, which obviates the need for manually entering bbox or
resolutions parameters (and then you maybe set OpenLayers with the default
-20037508.34 style maxExtents, and maxResolution:auto)

 -Josh


On Mon, Nov 16, 2009 at 9:27 AM, Christoph Lingg <christoph at lingg.eu> wrote:

> Thank you very much for your help, Dane!
>
> Unfortunately I still get the same error:
>  > An error occurred: Current x value 1050475.187500 is too far from
> tile corner x 1051768.941264
>
> Maybe it is because of my chosen bbox? Do I have to consider certain
> intervals or can I set it like I want?
>
> The other possibility I see is the projection. As I had problems, I
> chose the projection and settings that were exposed here in this
> working example:
> http://www.mail-archive.com/mapnik-users@lists.berlios.de/msg01550.html
>
> Does someone know where those errors come from and where i can search
> for more informations?
>
> Thanks,
> Christoph
>
> Am 15.11.2009 um 03:11 schrieb Dane Springmeyer:
>
> > Try putting:
> >
> > projection= +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0
> > +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs +over
> >
> > or
> >
> > projection= +init=epsg:900913
> >
> > in your tilecache.cfg
> >
> > Dane
> >
> > On Nov 14, 2009, at 10:19 AM, Christoph Lingg wrote:
> >
> >> (I think my last mail hasn't worked without registration, here
> >> again: )
> >>
> >> Hello everybody,
> >>
> >> our project just changed from GoogleMaps to OpenLayers and we are
> >> happy about being independent from proprietary solutions!
> >>
> >> But we also have to hurdle some new difficulties, and one of them
> >> seems to be a big challenge ;-) We are using the combination Mapnik,
> >> TileCache and OpenLayers and I couldn't figure out how to stick them
> >> together properly! The tiles are not displayed, but the error message
> >>
> >>> An error occurred: Current x value 1079827.000000 is too far from
> >> tile corner x 1095796.660000
> >>
> >> is shown. Can anybody give me a hint how to go on? My TileCache and
> >> OpenLayers configs look like that:
> >>
> >>           var options = {
> >>               projection: new OpenLayers.Projection("EPSG:900913"),
> >>               displayProjection: new OpenLayers.Projection("EPSG:
> >> 4326"),
> >>               maxExtent: new OpenLayers.Bounds
> >> (923284,5940116,1164513,6148046),
> >>               resolutions:
> >>
> [156543.0,78271.5,39135.75,19567.875,9783.9375,4891.96875,2445.984375,1222.9921875,611.49609375,305.748046875,152.874023438,76.4370117188,38.2185058594,19.1092529297,9.55462646484,4.77731323242,2.38865661621,1.19432830811,0.597164154053,0.298582077026
> >> ],
> >>               maxResolution: 156543.0,
> >>               units: 'm',
> >>               numZoomLevels: 19
> >>           };
> >>           this.map = new OpenLayers.Map(this.id, options);
> >>
> >>           var layer = new OpenLayers.Layer.WMS("wms",
> >>               "http://localhost:2280/tiles/tilecache.py", {
> >>                      layers: "wms",
> >>                      format: "image/png",
> >>                      "sphericalMercator": true
> >>                }
> >>              );
> >>
> >>           this.map.addLayer(layer);
> >>           this.map.zoomToMaxExtent();
> >>
> >> - - - - - - - - - - - - -
> >>
> >> type=Mapnik
> >> debug=on
> >> mapfile=/home/christoph/mapnik/malstube/map.xml
> >> bbox=923284,5940116,1164513,6148046
> >> resolutions
> >> =
> >>
> 156543.0,78271.5,39135.75,19567.875,9783.9375,4891.96875,2445.984375,1222.9921875,611.49609375,305.748046875,152.874023438,76.4370117188,38.2185058594,19.1092529297,9.55462646484,4.77731323242,2.38865661621,1.19432830811,0.597164154053,0.298582077026
> >> maxResolution=156543.0
> >> srs=EPSG:900913
> >> spherical_mercator=true
> >> metaTile=yes
> >>
> >>
> >> Thank you for your help!
> >> Christoph
> >> _______________________________________________
> >> Tilecache mailing list
> >> Tilecache at openlayers.org
> >> http://openlayers.org/mailman/listinfo/tilecache
>
> _______________________________________________
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>
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