I don't think so. I think you'd need to develop an equivalent function in 
geoserver. You can create a sql view and do this there though. 

charles

On Feb 8, 2012, at 4:28 PM, David R Robison wrote:

> Normally, in the SLD I refer to the geometry as a layer property:
> 
> <Geometry><ogc:PropertyName>the_geom</ogc:PropertyName></Geometry>
> 
> Could I specify a function here to use the lineshift function? David
> 
> On 2/8/2012 4:13 PM, Charles Galpin wrote:
>> David I use the upgis_lineshift function from
>> 
>> http://trac.osgeo.org/postgis/wiki/UsersWikiplpgsqlfunctions
>> 
>> for this sort of thing. The trick is to be able to tell what to shift, and 
>> use a different distance between the lines based on zoom level.
>> 
>> hth
>> charles
>> 
>> On Feb 8, 2012, at 4:07 PM, David R Robison wrote:
>> 
>>> We are trying to draw interstate roadways that have lines for each
>>> direction of travel. When zoomed in you can see the individual travel
>>> directions (e.g. east and west bound lanes). However, when zoomed out
>>> the directional roads are drawn on top of each other. What we want to do
>>> is to draw the road ways with a minimal separation between then even
>>> when zoomed out. Kind of like what Google maps does when showing traffic
>>> colors. When zoomed out you still see the different roadways for the
>>> different travel directions. Any thoughts on how to do this with
>>> geoserver? David
> 


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