Sorry for the noob question but does this require any other
configuration changes (ie. htaccess)? I've included this in my
index.html and it is still showing 404 errors in Chrome.
Thanks
On Jul 29, 2:19 pm, Barry Hunter <barrybhun...@gmail.com> wrote:
> <?php
>
> $filename =
> "tiles/".intval($_GET['z'])."/".intval($_GET['x'])."/".intval($_GET['y']).".png";
>
> header("Content-Type: image/png");
> header("Cache-Control: max-age=84600");
>
> if (file_exists($filename)) {
> header("Content-Length: ".filesize($filename));
> readfile($filename);} else {
>
> header("Content-Length: 95");
> readfile("transparent1x1.png");
>
> }
>
> Change to suit your needs.
>
> On Fri, Jul 29, 2011 at 4:52 PM, Jason <jason.wool...@gmail.com> wrote:
> > Does anyone know of a page or an example where this is done with PHP?
> > Makes sense but I haven't done much PHP.
>
> > Thanks
>
> > On Jul 28, 11:40 pm, Martin™ <warwo...@gmail.com> wrote:
> >> Why not make all tile requests to a PHP script?
>
> >> The script can check if the requested tile exists.
> >> If the tile exists then the script can return it to the map, otherwise
> >> it can return a blank transparent tile.
>
> >>http://php.net/manual/en/function.file-exists.php
>
> >>http://www.php.net/manual/en/function.file-get-contents.php
>
> >> A transparent 1 x 1 pixel PNG image can be used where there is no tile
> >> and that could be as small as 95 bytes:
>
> >>http://code.martinpearman.co.uk/deleteme/transparent_1x1.png
>
> >> Martin.
>
> >> On Jul 28, 1:28 pm, Jason <jason.wool...@gmail.com> wrote:
>
> >> > I'd really like to know a fix for this too. It's been a problem for me
> >> > for quite a while and I can't easily get write permission
> >> > to .htaccess.
>
> >> > On Jul 27, 1:46 pm, Kesuke <nick_dai...@hotmail.com> wrote:
>
> >> > > I am using custom tile overlays on a map. To fetch the tiles I use the
> >> > > generic method:
>
> >> > > function createImageMapType(id, opacityvalue) {
> >> > > return new google.maps.ImageMapType({
> >> > > getTileUrl: function(coord, zoom) {
> >> > > return "/tiles/" + id + "/"+ zoom + "_" + coord.x + "_" +
> >> > > coord.y + ".png";
> >> > > },
> >> > > tileSize: new google.maps.Size(256, 256),
> >> > > isPng: true,
> >> > > opacity: opacityvalue
> >> > > });
> >> > > }
>
> >> > > Here is the problem: My map uses lots of transparent PNG tiles, and
> >> > > infact some tiles are completely transparent. So rather than have
> >> > > thousands of 3kb empty PNG files, I just don’t have those tiles.
>
> >> > > This works but it technically generates a lot of 404 bad request
> >> > > errors. An average user visit can make as many as 300 bad requests.
> >> > > This really hurts page load time and also looks bad for search
> >> > > engines.
>
> >> > > So, does anyone have an idea how I could only fetch tiles that
> >> > > actually exist?
>
> >> > > One other idea I have had is could I setup an .htaccess rule that
> >> > > redirects to a universal empty PNG file for any tile that can’t be
> >> > > found (so it doesn’t return a bad request).
>
> >> > > I don’t want to generate empty tiles as I have over 130 custom tile
> >> > > overlays for zoom levels 1 through 5. Just at zoom level 5 that would
> >> > > be something like 140,000 files and my server is limited.
>
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