[OpenLayers-Users] Question on having multiple layers

[Lee Keel]

> -----Original Message-----
> From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org]
> On Behalf Of Ali Khan
> 
> 
> Is there anyway one can make a select box on the page and on change have
> it reference the appropriate layer to show in OpenLayers?
> Also for each layer we want to have a seperate getFeatureinfo query as
> each layer contains different data. How do we do this? can we do
> layer.events.register instead of map.events.register for instance so
> that each layer has its own on click event?
> 
What we are currently doing is catching the map click and getting a list of
all visible layers and layers that are in range.  Something like:

var layers = "";
for (var i = 0; i <  map.layers.length; i++){
  map.layers[i].inRange + " - " + map.layers[i].displayOutsideMaxExtent);
  if (map.layers[i].visibility == true && map.layers[i].inRange == true ){
     if (layers == "") layers = map.layers[i].name;
     else layers = layers + ", " + map.layers[i].name;
   }
}

Then, we have queries in the configuration file that are related to each
available layer so that we can make spatial queries to the appropriate
tables at the given XY (of course + some buffer). 
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