Create tiles & demo at other end of zoom? about google-imagemap-tile-generator

[samsargent]

Hi John,

Thanks, I'm glad someone else has found it useful!

If I understand correctly, you just want to get rid of the 'looping' on the x axis when fully zoomed out?

If so, you can just update the javascript in the downloaded file to get rid of the call to getNormalizedCoord when initializing the Google map and instead use:

getTileUrl: function(coord, zoom) {
 /*
 Delete this commented out code:
var normalizedCoord = getNormalizedCoord(coord, zoom);
  if (!normalizedCoord){
    return null;
  }
 var bound = Math.pow(2, zoom); // this can also be removed as it's never used anyway
*/
return url_to_tiles+"/tile_" + zoom + "_" + coord.x + "-" + coord.y + ".png"; 
// NB. normalizedCoord.x & normalizedCoord.y replaced by coord.x & coord.y


}

If the tiles themselves are generated incorrectly than I'm not sure what needs to change sorry :(

Hope that helps!

[johndwells]

Morning,

I've managed to get that far and prevent the map render from "looping"; our issue has more to do with limiting the panning to within the original bounds of our custom map. However since we are operating all the way zoomed out, we can quickly pan into the next "loop" of the sphere.

The best way I can think to avoid this is to keep our zoom at 2 or 3 at the least, and establish our boundary limits by that zoom, so there's no way to pan "back around".

So I've modified the script to allow for a max zoom level of 6, which requires an 8192px square PNG. I've upped my PHP memory to 1.6GB, and execution time to 960. I'm still waiting (patiently). I can keep going higher if that's all it's a matter of.

Any other ideas? I was thinking I might look at the MapTiler app, but since I'm so close with this one I figured I'd press on a bit further!

Cheers,
John

[johndwells]

Hi Sam,

I think I've made progress - I was having tons of trouble getting it to create anything over zoom 5, and finally found this at line 71 of ajaxTiles.php:

if(empty($_POST['levels']) || $_POST['levels'] < 1 || $_POST['levels'] > 5 || empty($_POST['filename']))

I've adjusted that upper limit requirement for $_POST['levels'], and then was fine. I wonder if it'd be worth abstracting that upper limit somehow into a config setting?

Either way, brilliant tool thanks again!

Cheers,
John

[samsargent]

yeah great idea, good to hear you've found a solution.

To be honest I hadn't expected it to get much use so I hadn't thought this far ahead. I've set myself a task to clean it up when I get some time. Config file for settings sounds like a good idea.

I'd say there'd also be a way to restrict the panning in the google maps config.

Here's an example I quickly found which I think is what you're trying to do:
http://jsfiddle.net/yV6xv/33/

It involves fairly complex maths for working out the projection at the various zoom levels and then working out the bounds.

Let me know if/when your project is up, I'd love to check out what you're using it for.

Cheers,
Sam

[johndwells]

Hi Sam,

WOW, that fiddle is far out. Along my journey of setting this custom map up I had read up some on the Projection object, but it was way over my head! But in the end my function is very similar to your boxIn() and it does us well.

The project should be launching next week, I'll definitely share a link.

Thanks again,
John

[samsargent]

Haha, yeah I know, it's not my fiddle, just one I found when searching for
a solution. It's way over my head as well.

Awesome, good luck with the launch!

On 14/09/2012, at 8:04 PM, John D Wells [email protected] wrote:

Hi Sam,

WOW, that fiddle is far out. Along my journey of setting this custom map up
I had read up some on the Projection object, but it was way over my head!
But in the end my function is very similar to your boxIn() and it does us
well.

The project should be launching next week, I'll definitely share a link.

Thanks again,
John

—
Reply to this email directly or view it on
GitHubhttps://github.com//issues/3#issuecomment-8556824.

[johndwells]

Hi Sam,

Well it took a bit longer than anticipated to get the site launched, but it's finally up. Here's our implementation of custom gmap tiles using your generator:

http://wellington-house.com/location

Thanks again for the help!

Cheers,
John

[samsargent]

A web project taking longer than expected? No way ;)

Wow, nice job. Those markers are awesome. I wanted to do something like that for the initial project I used the generator for but didn't have the time. Thanks for posting the link.

My pleasure, I'm just glad it came in handy.

Cheers,
Sam