[OpenLayers-Dev] [Fwd: OpenLayers openlayers\lib\OpenLayers\Layer\Grid.js]

[Christopher Schmidt]

This was sent to me personally. I have not evaluated it. 

> Hi,
> 
> I find error in ???calculateGridLayout???.
> 
> It is nessary to correct  tileoffsetx,tileoffsetlon, tileoffsety,
> tileoffsetlat .
> 
> In Revision 6535 in Grid.js 
> 
>         var offsetlon = bounds.left - extent.left;
>         var tilecol = Math.floor(offsetlon/tilelon) - this.buffer;
>         var tilecolremain = offsetlon/tilelon - tilecol;
>         var tileoffsetx = -tilecolremain * this.tileSize.w;
>         var tileoffsetlon = extent.left + tilecol * tilelon;
> 
>         var offsetlat = bounds.top - (extent.bottom + tilelat);  
>         var tilerow = Math.ceil(offsetlat/tilelat) + this.buffer;
>         var tilerowremain = tilerow - offsetlat/tilelat;
>         var tileoffsety = -tilerowremain * this.tileSize.h;
>         var tileoffsetlat = extent.bottom + tilerow * tilelat;
> 
> I use
> 
>         var offsetlon = bounds.left - extent.left;
>         var tilecol = Math.floor(offsetlon/tilelon) - this.buffer;
>         var tilecolremain = offsetlon/tilelon - tilecol;
>         var tileoffsetx = -tilecolremain * this.tileSize.w;
>         var tileoffsetlon = extent.left + tilecol * tilelon;
> 
>         if (this.tileOrigin) { 
>         var nx = Math.round((tileoffsetlon -
> this.tileOrigin.lon)/tilelon);
>         var x = tileoffsetlon;
>         tileoffsetlon = this.tileOrigin.lon + nx * tilelon;
>         tileoffsetx += (tileoffsetlon - x) / resolution;
>         }
> 
>         var offsetlat = bounds.top - (extent.bottom + tilelat);  
>         var tilerow = Math.ceil(offsetlat/tilelat) + this.buffer;
>         var tilerowremain = tilerow - offsetlat/tilelat;
>         var tileoffsety = -tilerowremain * this.tileSize.h;
>         var tileoffsetlat = extent.bottom + tilerow * tilelat;
> 
>  
> 
>         if (this.tileOrigin) { 
>         var ny = Math.round((this.tileOrigin.lat -
> tileoffsetlat)/tilelat);
>         var y = tileoffsetlat;
>         tileoffsetlat = this.tileOrigin.lat - ny * tilelat;
>         tileoffsety -= (tileoffsetlat - y)  / resolution;
>         }
> 
>  
> 
> Regards,
> 
>  
> 
> Toporovskiy Alexandr.

Regards,
-- 
Christopher Schmidt
MetaCarta