[mapserver-users] clipping symbols at tile boundary?

[Wendell Turner]

Thanks.  The gutter parameter seems to fix the symbols, and
the symbol labels, but the labels on lines are still
chopped.  The labelcache_map_edge_buffer didn't seem to
work.  For now I'll just use 'singleTile: true', and take
the (non-tiled) performance hit.

On Mon, Jun 22, 2009 at 07:27:02AM -0400, Christy Nieman wrote:
> Hi,
>
> You can put "labelcache_map_edge_buffer" "-10" in the WEB block metadata.  
> This will ensure that no labels are drawn within 10 pixels of a tile 
> boundary (you can change the value to increase or decrease the buffer zone)
>
> E.g.:
> MAP
>  ...
>  WEB
>    METADATA
>      "labelcache_map_edge_buffer" "-10"
>    END
>    ...
>  END
>  ...
> END
>
> Christy
>
> BrainDrain wrote:
>> OL gutter helps with symbols but breaks labels. PARTIALS false doesn't help
>> in this case. I didn't find solution how to avoid breaking labels while
>> using gutter. I suppose the only one is to turn off gutter (prebuild OL map
>> clone with no gutter) on scales when symbols are turned off (if symbols are
>> visible in large scales then labels uses large font size and gutter works
>> fine with labels).
>>
>> Aaron Racicot wrote:
>>   
>>> Wendell,
>>>
>>> Look at 'gutter' in OpenLayers.  It will allow you to get tiles slightly
>>> larger from your Mapserver WMS to get rid of some of the artifacts:
>>>
>>> http://dev.openlayers.org/docs/files/OpenLayers/Layer-js.html#OpenLayers.Lay
>>> er.gutter
>>>
>>> Hope that helps...
>>>
>>> Aaron
>>>
>>> --------------------------
>>> Aaron Racicot
>>> Z-Pulley Inc.
>>>
>>>
>>> -----Original Message-----
>>> From: mapserver-users-bounces at lists.osgeo.org
>>> [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Wendell
>>> Turner
>>> Sent: Thursday, June 18, 2009 4:59 PM
>>> To: mapserver-users at lists.osgeo.org
>>> Subject: [mapserver-users] clipping symbols at tile boundary?
>>>
>>> (this must be basic, but here goes anyway...)
>>>
>>> I'm using Mapserver 5.2 with OpenLayers 2.7.  I have a
>>> vector mapserver layer with point objects (shown with circle
>>> symbols) on it.  The vector layer referenced via
>>> OpenLayers.Layer.WMS and is tiled.
>>>
>>> The circles are displayed in the tile that the center is on,
>>> but not the adjacent tiles.   That is, if a circle is near
>>> the edge, part of the circle is chopped off.
>>>
>>> Is that what 'BUFFER 10' fixes?  What about 'PARTIALS
>>> FALSE'?  That seems to be just for labels, but that only
>>> shows the label when it completely lies within the tile.
>>> Do I need to turn off tiling completely?
>>>
>>> Thanks,
>>>
>>> Wendell
>>>
>>> _______________________________________________
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>>> mapserver-users at lists.osgeo.org
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>>>
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>>>
>>>
>>>     
>>
>>   
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