Yes, GeoServer only takes into account the area being rendered when
determining label positions, so this sort of thing is expected. You can
mitigate it by using a caching server to render large areas and then use
simple image cropping to generate the small tiles - we call that technique
"metatiling." GeoWebCache can do it automatically:
http://geowebcache.org/docs/current/concepts/metatiles.html
--
David Winslow
OpenGeo - http://opengeo.org/
On Mon, Jul 16, 2012 at 5:20 AM, vrbikdan <[email protected]> wrote:
> Hi all,
> I'm trying to set labels for my layers. I have point layer with about 3000
> points and this layer is only for showing labels. In SLD I set AnchorPointX
> and Y to 0.5 and 0.5 so center of label should be exactly above the point.
> And this work if I serve this labels as single tile. But from some reasons
> I
> don't want to use single tile. So I define tiled: true in my OpenLayers.
> But
> in some cases label center is not exactly above point but displaced little
> bit. It is shown on images (it is only one example, this shift could be to
> any direction on any pixels). Code I used is here:
>
> new OpenLayers.Layer.WMS(
> "admin_obec_centroid_label_type",
> "http://192.168.1.98:8080/geoserver/zk/wms";,
> { layers: 'zk:admin_obec_centroid_label_type',
> srs: 'EPSG:3857',
> format: 'image/png',
> tiled: true,
> tilesOrigin : map.maxExtent.left + ',' +
> map.maxExtent.bottom,
> transparent: 'true'
> },
> {singleTile: false,
> yx : {'EPSG:3857' : false}})
>
> Is anything I forget to define or is it normal behavior and could't be
> changed?
>
> Thanks,
> Dan
> http://osgeo-org.1560.n6.nabble.com/file/n4988536/singleTile.png
> http://osgeo-org.1560.n6.nabble.com/file/n4988536/tiled.png
>
> --
> View this message in context:
> http://osgeo-org.1560.n6.nabble.com/meta-tiling-doesn-t-preserve-position-of-labels-tp4988536.html
> Sent from the GeoServer - User mailing list archive at Nabble.com.
>
>
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