I'm not sure I understand your question.
If you already know how to draw tiles with PHP, then you also know how
to calculate the tile numbers from lat/lon values.

--
Marcelo - http://maps.forum.nu
--




On Aug 1, 1:41 am, "S.Choe" <[email protected]> wrote:
> Dear All.
>
> I used custom tile method to draw tile overlay covering some area.
>
> My program
> GTileLayer g;
> g.getTileUrl() is defined by a separate php code with tile.x, tile.y,
> zoom level.
>
> In defining getTileUrl(), I generate image with (x,y,zoom). But it
> took to much time.
>
> I would like to generate the image before user's view frustum visit
> the area.
> That is to say, I would like to implement function:
> For given area [minx, miny, maxx, maxy],
> generateTile([minx, miny, maxx, maxy], [minzoom, maxzoom]) will
> returns
> array of tile images which covers all the area and for given interval
> of zooms.
>
> For any given area and zoom, how do i compute grid of tiles (tile.x,
> tile.y)?
>
> Thank you.
>
> SK.
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