[ka-Map-users] kaMap - setTile function - uses openstreetmap servers.

[Joe Franklin]

very cool.  has anyone modified tile.php so it can accept x/y/z parameters instead of the top/left/scale parameters?  then tile.php could be used instead of TileCache which is written in Python instead of PHP.

joe



--- On Mon, 5/25/09, Ionut Muntean <ionut at muntean.ro> wrote:

> From: Ionut Muntean <ionut at muntean.ro>
> Subject: [ka-Map-users] kaMap - setTile function - uses openstreetmap servers.
> To: "ka-map-users" <ka-map-users at lists.maptools.org>
> Date: Monday, May 25, 2009, 6:52 AM
> kaMap - setTile function - uses
> openstreetmap servers.
> 
> File that replaces init.php. Paste the code below in a file
> on your 
> server and load it at run time instead of init.php.
> 
> /*init*/
> aszScales = new 
> Array('110936068.18103503','55468034.09051751','27734017.045258757',
> '13867008.522629378','6933504.261313272','3466752.130658053',
> '1733376.0653290264','866688.0326645132','433344.0163322566',
> '216672.008164711','108336.00408377283','54168.002041886415',
> '27084.001020943208','13542.000510471604','6771.000253818478',
> '3385.5001283265624','1692.7500655806048');
> var mResolutions = new Array('156543.0339', '78271.51695',
> 
> '39135.758475', '19567.8792375', '9783.93961875',
> '4891.969809375', 
> '2445.984904687',
>                
>             '1222.992452344',
> '611.496226172', 
> '305.748113086', '152.874056543', '76.437028271',
> '38.218514136', 
> '19.109257068',
>                
>             '9.554628534',
> '4.777314267', '2.388657133', 
> '1.194328567', '0.597164284');
> var map = new 
> _map({name:'Terra',title:'World',currentScale:2,units:3,resolution:72,version:'3',scales:aszScales,
> 
> resolutions:mResolutions});
> map.setDefaultExtents(-20037508.34, -200037508.34,
> 200037508.34, 
> 200037508.34);
> map.setBackgroundColor('rgb(244,244,234)');
> map.addLayer(new _layer( { 
> name:'Terra',visible:true,opacity:100,imageformat:'png',queryable:false,tileSource:'auto',redrawInterval:-1,refreshInterval:-1,scales:
> 
> new 
> Array('1','1','1','1','1','1','1','1','1','1','1','1','1','1','1','1','1')}));
> this.addMap( map );
> this.tileWidth=256;
> this.tileHeight=256;
> this.server = 'http://xxx.xxx.xxx/';
> this.tileURL = 'http://a.tile.osm.dmtech.ro/tiles/';
> this.cacheURL = 'http://localcache.xxx.xxx/tiles/';
> this.selectMap('Terra');
> 
> 
> Replace setTile with the function below.
> 
> _layer.prototype.setTile = function(img) {
>    var tforce = _settings.alwaysForceDraw;
>    if (arguments.length == 2)
>        tforce = true;
>    var mercExtents = new
> Array('-20037508.34', '20037508.34');
>    var zIdx = (this._map.currentScale + 2);
> // osm zooms are from 0 to 
> 18. azScales contains only calculated scales from 2 to 18
> ...
>    var res = this._map.resolutions[zIdx];
>    var km = this._map.kaMap;
>    var left = km.cellSize *
> (safeParseInt(img.style.left) + km.xOrigin);
>    var top = -1 * km.cellSize *
> (safeParseInt(img.style.top) + km.yOrigin);
>    var right = left + km.cellSize *
> km.tileWidth;
>    var bottom = top - km.cellSize *
> km.tileHeight;
>    if (left < mercExtents[0] || left >
> mercExtents[2] || top < 
> mercExtents[0] || top > mercExtents[1]) return false;
>    var limit = Math.pow(2, zIdx);
>    var x = Math.round((left -
> mercExtents[0]) / (res * km.tileWidth));
>    var y = Math.round((mercExtents[1] - top)
> / (res * km.tileHeight));
>    if (y < 0 || y >= limit) return
> false;
>    x = ((x % limit) + limit) % limit;
>    if (tforce) {
>       var src = this._map.kaMap.tileURL +
> zIdx + '/' + x + '/' + y + '.png';
>    } else {
>       var src = this._map.kaMap.cacheURL +
> zIdx + '/' + x + '/' + y + 
> '.png';
>    }
>    if (img.src != src) {
>        img.style.visibility =
> 'hidden';
>        img.src = src;
>    }
> };
> 
> 
> 
> Have fun!
> Ionut Muntean
> 
> 
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