You should be able to create two tile layers, i.e. two GTileLayer objects. If you notice these lines:

var tilelayer = new GTileLayer( copyrightCollection, obj.minResolution ? obj.minResolution : 0, 18 );
tilelayer.getTileUrl = obj['callback'];
var tilelayers = [ tilelayer ];

You would essentially need to duplicate the first two lines, and then include the second tile layer in the last line, e.g.:

var tilelayers = [ tilelayer, tilelayer2 ];

The existing custom_map_types structure doesn’t really allow for this but you should be able to expand it or hack the script to allow.

Adding just one (or more) new map is no problem. But due to license problens the hiking map is rendered newly in two tiles with transparency (one for the highs-layer and another with the rendered OSM-data).
If I only show the OSM-layer it looks flat. So how can I render both layers the same time (like Google-Sat with extra Streetlayer)? I’ve no experience with the google-map-api and nearly no experience with JavaScript …

The next question is about the license of your script? Could I put a modified version on my own server for the german geocachers?

Greetings Florian

I probably wouldn’t put this tile layer into the main OSMify plugin, but if you would like to extend the JavaScript to make your own version it would be quite simple to modify the file that you can find at http://johnmckerrell.com/files/osmify.js to add your own layer and then modify the bookmarklet to load that file instead.

Do let me know if you have any problems with that.

John

Is there the posibility to integrate this OSM Renderer?

http://opentiles.com/nop/

For Geocachers or hiker in Germany I think this is a nice map.

Greetings