ops sorry, I misunderstood your question. The styling I suggested would
work with a vector layer. a WMS request delivers an image, so there
isn't much OL can do about it. you can though change the layer
parameters on the fly, so that with the next WMS request the map will be
requested with a different sld (you have to have preconfigured slds of
course). You can add such parameter to the layer with:
mergeNewParams({SLD: "your_sld_uri", STYLES: null).
See the thread
http://old.nabble.com/dynamic-SLD-with-openlayers-td21367731.html
Good luck
Ken wrote:
Hi, thanks for the response.
I have messed with this, but I was under the impression this would not
work with a WMS layer? Would I need to convert my data to GML or
something similar in order to use a StyleMap on it?
I have had issues with GML in the past, so prefer not to go that route
if I do not have to.
Ken
On 08/09/2010 11:41 AM, Moataz Elmasry wrote:
See this example
http://www.openlayers.org/dev/examples/stylemap.html
Where with StyleMap you can change the style on the fly through a
function, where this function is bound to a certain attribute, for
example:
var defaultTemplate = {
fillColor : "${getStyleColor}",
fillOpacity : 0.5,
strokeColor : "${getStyleColor}",
strokeOpacity : 1,
strokeWidth : 2,
pointRadius : 4,
label : "${getName}"
};
getStyleColor = function(feature) {
if (feature.x) return "red"
else if (feature.y) return "blue";
}
var customStyleMap = new OpenLayers.StyleMap({
"default": new OpenLayers.Style(defaultTemplate, {context: context}),
"select": new OpenLayers.Style({
strokeColor: "red",
strokeOpacity : 1
})
});
Ken wrote:
Doing some brain storming on how best to approach styling one dataset
based on the information in a database.
What we have is a polygon layer, currently a shape file displayed via
WMS, but I can convert it to whatever I need it to be.
We also have a database of information that pertains to each polygon
and that changes as new information is added. This is currently an
Access database accessible via an ODBC connection.
What I would like to do is change the fill color of my polygons based
on the contents of the database on the fly. So whenever someone
refreshes the map it will go to the database and use the data there to
determine what colors the polygons should be.
Thoughts on best approach?
Thanks,
Ken
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