icons/map_icon.png
from sitn PotreeViewer
http://ne.ch/sitn
https://github.com/PotreeViewer/PotreeViewer

icons/navigation_cube.svg
icons/orthographic_camera.svg
icons/perspective_camera.svg
free for commerical use without attribution
http://www.freepik.com/free-icon/package-cube-box-for-delivery_720159.htm