If you want to make it easy for yourself, don't set the tilesorigin
property; use the same extent for both GWC and for the base layer (and
thus all other layers, by default) in the OpenLayers client.
The tilesorigin is tricky because you can define it to be an integer
number of tiles from the extent for one resolution, but probably not for
all resolutions (unless they're just rb = ra / 2).
For those other resolutions you have an inconsistent grid definition, so
the client has to ignore either the tilesorigin, adjust the resolution
or adjust the extent. It will probably ignore the extent you gave it.
But the GridSets in GWC don't have a tilesorigin, so GWC will just
return the closest tile aligned to the original extent.
-Arne
On 26/05/14 17:43 , fegyi001 wrote:
> Dear Users!
>
> I have a big problem with cached tiles. In my web application I wish to
> store and access visited tiles through GoeWebCache.
> In the web client (OpenLayers 2.13.1), however, with some zoom levels there
> is a massive misplacement of the tiles.
> I use EPSG:23700 everywhere: all my layers (vectors stored in PostGIS,
> GeoTIFFs stored in GeoServer) and also OpenLayers uses it.
>
> The strange thing is, that at some zoom levels everything is fine, but when
> I zoom one more step in, the misplacement becomes visible again. After
> another zoom the misplacement disappears, and then appears again (this
> sounds very "patternish", but there is no pattern of its behaviour).
> Please look at the attached images.
>
> In GeoServer I created a new Gridset for my EPSG:23700, it has the very same
> zoom levels than the OpenLayers.Map has.
>
> In OpenLayers I also added the tileOrigin property to the layer which is has
> the minx, miny values of the layer's extent (calculated by GeoServer).
>
> At Caching Defaults I checked the "Enable direct integration with GeoServer
> WMS" option, so I can use the default GeoServer wms url.
>
> The cached layer is configured so that it accepts the EPSG:23700 gridset
> ("Tile Caching" option).
>
> I ran out of ideas. Can anyone help? My GeoServer version is 2.4.4.
>
> Best
> Gergely
>
>
> <http://osgeo-org.1560.x6.nabble.com/file/n5142563/01.jpg>
> <http://osgeo-org.1560.x6.nabble.com/file/n5142563/02.jpg>
> <http://osgeo-org.1560.x6.nabble.com/file/n5142563/03.jpg>
> <http://osgeo-org.1560.x6.nabble.com/file/n5142563/04.jpg>
> <http://osgeo-org.1560.x6.nabble.com/file/n5142563/05.jpg>
>
>
>
> --
> View this message in context:
> http://osgeo-org.1560.x6.nabble.com/GeoWebCache-misplacement-tp5142563.html
> Sent from the GeoServer - User mailing list archive at Nabble.com.
>
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