[mapserver-users] Showing pop up for a line

[Steve Lime]

Why not use straight MapServer queries? Set a reasonable tolerance and that should
work ok too.

Steve

>>> On 1/6/2009 at 12:04 AM, in message <4962F45D.3010103 at gslab.com>, Subha
Ramakrishnan <subha at gslab.com> wrote:
> Hi,
> 
> I am using Mapserver 5.0.2 with Openlayers.
> I've a line layer (from mapserver) shown on my base map(google physical).
> Now, when i click on a line, i want to show a pop using openlayers.
> I am able to do this for a polygon layer. I send the lat,lon of the 
> point that is clicked and use the postgis query
> "ST_Contains(topology,geomFromText('POINT(77.87117958068927  
> 13.491965860913544)',-1))" to find the polygon (and fetch the polygon 
> specific data to show on pop up) and attach the Openlayers popup to the 
> point clicked.
> 
> I am not able to do this for a line layer as the postgis query doesn't 
> return anything.
> I tried this query also, 
> "ST_Contains(topology,geomFromText('POINT(77.87117958068927  
> 13.491965860913544)',-1)) AND 
> distance(topology,geomFromText('POINT(77.87117958068927 
> 13.491965860913544)',-1)) <= 1" but it doesn't work.
> 
> Does any one know how to check if a point is a part of a line or if 
> there is any other way to show the pop up?
> 
> Thanks a lot for the help.
> 
> Regards,
> Subha
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