This repository complements this web-based mapping tool: https://github.com/archisgore/ScubaDiveMap
The repo should be hosted for immediate viewing here: http://map.archisgore.com/
These markers may be edited by anyone, and I'll accept nearly any pull request. If you'd like to be a collaborator on the repo (so that you may accept PRs, or push your markers without waiting around, or whatever your reason may be, simply email me, and I'll add you as a collaborator.)
The ScubaDiveMap repo has more details on what this is all about.