[OpenLayers-Dev] VML.js - unspecified error

[Jeff Dege]

I'm taking a first look at the new Vector stuff, and I'm not getting
very far.

In Renderer/VML.js, is the function supported:

    /**
     * @returns Whether or not the browser supports the VML renderer
     * @type Boolean
     */
    supported: function() {
        var supported = document.namespaces;
        return supported;
    },

This is throwing an "htmlfile: Unspecified error" on the
"document.namespaces".

Using Visual Studio 2005, with it's ASP.NET Development Server, and IE
6.  In this environment, document doesn't have a "namespaces" element.
 
> -----Original Message-----
> From: users-bounces at openlayers.org 
> [mailto:users-bounces at openlayers.org] On Behalf Of Lennox Antoine
> Sent: Monday, March 19, 2007 10:43 AM
> To: users at openlayers.org
> Subject: [OpenLayers-Users] Unnecessary WMS Queries?
> 
> Hi All,
> 
> New to the list. Don't know if this is the appropriate forum, but I
> have been observing the amount of WMS queries that comes across my
> client, and it seems like too much.
> 
> Take for example the map on the front page of OpenLayers.org. It's a
> 512x256 map, so I would expect 2 images to cover it, or 6 images in
> the worst case scenario. If I look at Firefox->Tools Menu->Page
> Info->Media tab, I see that it has two requests.
> 
> Now I click the plus button on the map to zoom in 1 level, and I would
> expect at most 6 wms tiles to be loaded. Instead 8 wms requests are
> made. I hit the plus again, and 28 WMS requests are generated (intead
> of max 6).
> 
> If the image isn't cached up, this causes a lot of WMS traffic to be
> generated on my WMS server, which in turn causes backup since requests
> can't be fulfilled in time. In my case, I am dealing with alot of
> images that won't necessarily be cached up, and need quicker response
> rather than getting coverage. Is there anyway to minimize the amount
> of WMS requests that are being made?
> 
> -Lennox
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