3D matrix map

The Tangram 3D map rendering library powering that demo does support moving camera!

Give this other Tangram demo a try: http://tangrams.github.io/lights-cameras-demo/

If you like to use this in your own visualization/app/site, there's more information about how to use Tangram here:

- intro: https://mapzen.com/projects/tangram

- documentation: https://github.com/tangrams/tangram/wiki

this version seems to have arbitrary camera angle https://github.com/tangrams/tangram-es