[OpenLayers-Users] Is there a "LikeBing" layer out there?

[Mike Purvis]

The quadtree structure is a little wacky, but it's nice for being able to
selectively purge your cache based on regular expressions.

Anyhow, here's the working class. Bit of a hack, but it does the trick:

var VELayer = OpenLayers.Class(OpenLayers.Layer.XYZ, {
    name: "VirtualEarth",
    attribution: "Microsoft",
    sphericalMercator: true,
    url: '/tiles/a${n}.jpeg',
    CLASS_NAME: "VELayer",

    getURL: function (bounds) {
        var res = this.map.getResolution();
        var x = Math.round((bounds.left - this.maxExtent.left) / (res *
this.tileSize.w));
        var y = Math.round((this.maxExtent.top - bounds.top) / (res *
this.tileSize.h));
        var z = this.map.getZoom();
x = x.toString(2);
 y = y.toString(2);
while(x.length < z) { x = "0" + x; }
while(y.length < z) { y = "0" + y; }
 var n = [];
for(var i = 0; i < z; i++) {
  n.push((parseInt(x[i]) + parseInt(y[i]) * 2).toString());
 }
        var url = this.url;
        var path = OpenLayers.String.format(url, {'n': n.join('') });

        return path;
    }
});



On Tue, Jul 13, 2010 at 10:57 AM, Stephen Woodbridge <
woodbri at swoodbridge.com> wrote:

> Right! that is not the intent here. I have clients that are moving away
> from Bing but have apps that are built around this tile name scheme. They
> would like to create a cache using mapserver of tiles like this for their
> other apps. being about to browse the cache in OL makes it much easier to
> develop, review and build web apps all using the same cache.
>
> The big issue I see with this is determining an appropriate directory
> structure that maximizes tile storage in dirs so you don't have excessive
> directory overhead and that you do not have too many files in a directory or
> run out of inodes.
>
> -Steve
>
>
> Andreas Hocevar wrote:
>
>> Mind that using Bing tiles directly is a violation of the Bing Maps terms
>> of use.
>>
>> Regards,
>> Andreas.
>>
>> On Jul 13, 2010, at 15:33 , Mike Purvis wrote:
>>
>>  Hey,
>>>
>>> If I want to serve the Bing tiles directly, without using the
>>> VirtualEarth wrapper layer, has that already been coded up by anyone? I know
>>> it's just a matter of extending Openlayers.Layer.XYZ and plugging in the
>>> correct geturl function. It's just that Bing's tile urls are based on some
>>> quadtree nonsense that makes it slightly more of a pain that just dropping
>>> in the coordinates.
>>>
>>> Nevermind about whether it's a good idea or not—has it already been done,
>>> or should I just do it myself?
>>>
>>> Thanks!
>>>
>>> Mike
>>> _______________________________________________
>>> Users mailing list
>>> Users at openlayers.org
>>> http://openlayers.org/mailman/listinfo/users
>>>
>>
>>
>>
>>
>


-- 
http://uwmike.com
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