[Mapserver-users] Query on symbols

[Norbert Thieme]

Hello,

I hope that you found a way to solve your problem. If not I have a 
suggestion that might help. Hopefully I get your problem right. Let's 
see. I think you are using php/mapscript and the querybypoint function? 
And you have symbols on a point layer that should represent the points? 
When you do a click on the symbol you want to get the attributes from 
the points?

Perhaps someone from the list can confirm this because I havn't tried it 
yet.

Try this:
Loop through your layers and check the layer->type and when it is 0 then 
you have a point layer. Then you can set the tolerance big enough to 
match your symbols. In all other cases you can do your querybypoint on 
the layer with tolerance 0 or what you want.

It could look like:

for ($i=0; $i < $map->numlayers; $i++)
{
   $layer = $map->getLayer($i);
   if ($layer->type == 0)
   {
     if (@$layer->queryByPoint($query_point, MS_MULTIPLE, 10) == MS_SUCCESS)
     {

     ..
     ..

     }
   }
   else
   {
     if (@$layer->queryByPoint($query_point, MS_MULTIPLE, 0) == MS_SUCCESS)
     {

     ..
     ..

     }
   }
}

Regards,
Norbert