Context
We need to simplify community's migration from the current wmflabs-hosted maps implementation to <mapframe>. For that, we should provide something similar to how it looks now, with similar behavior, using common.js and other similar mechanisms Mediawiki:Kartographer.{js,css} (since T133954).
Example
https://en.wikivoyage.org/wiki/Salzburg#Get_around
https://tools.wmflabs.org/wikivoyage/w/poimap2.php?lat=47.79990&lon=13.04288&zoom=15&layer=W&lang=en&name=Salzburg
EDIT 5/13/16: ( T132971#2294638 )
I created a github repository to share the prototype I have been working on:
https://github.com/juliengirault/wikivoyage-maps
EDIT 5/17/16: ( T132971#2302760 )
The prototype was deployed to English Wikivoyage this morning (.js, .css). See the Travellers' pub announcement.