All data are under Public Domain Dedication and License (PDDL).

There are no restrictions to use for PDDL, though attribution is always nice :)

From Open Data Commons webpage on PDDL:

You are free to:

  • To Share: To copy, distribute and use the database.
  • To Create: To produce works from the database.
  • To Adapt: To modify, transform and build upon the database. 


Read more about are thought process for choosing PDDL here: