[mapserver-users] Showing pop up for a line

[Subha Ramakrishnan]

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