Switch base map

[Robinlovelace]

We can set the basemap to anything listed here and probably more:
http://leaflet-extras.github.io/leaflet-providers/preview/index.html

Specifically, I think the OpenCycleMap image could be of use in some cases. This can be added by: 'http://{s}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' .

Is there a way to allow the user to switch the base map 'live', like this?

[usr110]

@Robinlovelace This is really interesting. Thanks for sharing. I am looking into it.

[usr110]

@Robinlovelace I've just added an option to change the base of the map. Please have a look at it - 19d4c88
So far it is only for testing purposes. I will add more options now.

[Robinlovelace]

@usr110 done. may be good to make this more subtle - a floating tick-box?

[usr110]

@Robinlovelace I was thinking about it. Depends on how many options are we going to give users? A radio button is more useful, I believe. What say?

[usr110]

@Robinlovelace Like this - 8b8a43c

[Robinlovelace]

I say radio buttons is a good solution, as long as it does not make the right hand bar too long.