I am keenly interested in this.
A couple of points:
I was really excited about The Dutch Map project but when I tried 1.4 I and some others ran into a few issues:
The map was not fully OpenGL compatible. Please try to take into account users who have no choice but to work in OpenGL, and ensure the map will not cause repeated frequent crashes.
The second point is ensuring that the map is sufficiently optimized for slower computers. MhaPro, RusMap and Schwartzwald map all were well optimized to keep reasonable FPS, but the Dutch Map often (but not always) caused some users a noticeable drop that really spoils the experience.
Best of luck with this, it sounds like a fantastic project!
