# License

The Data Observatory is a collection of various sources of data with varying licenses. We have worked hard to find you data that will work for the broadest set of use-cases. For competency, please still review the terms for any dataset you use and respect the rights of the owners for each dataset. The following third-party data sources are used in the Data Observatory, and we have included the links to the terms governing their use.

Name  | Terms link 
-------|---------
ACS   |  [https://www.usa.gov/government-works](https://www.usa.gov/government-works)
TIGER   |  [https://www.usa.gov/government-works](https://www.usa.gov/government-works)
Zillow Home Value Index | This data is "Aggregate Data", per the Zillow Terms of Use<br /><br />[http://www.zillow.com/corp/Terms.htm](http://www.zillow.com/corp/Terms.htm)
Who's on First |  [http://whosonfirst.mapzen.com#License](http://whosonfirst.mapzen.com#License)
GeoNames  |  [http://www.geonames.org/](http://www.geonames.org/)
GeoPlanet  |  [https://developer.yahoo.com/geo/geoplanet/](https://developer.yahoo.com/geo/geoplanet/)
Natural Earth  |  [http://www.naturalearthdata.com/about/terms-of-use/](http://www.naturalearthdata.com/about/terms-of-use/)
Quattroshapes  |  [https://github.com/foursquare/quattroshapes/blob/master/LICENSE.md](https://github.com/foursquare/quattroshapes/blob/master/LICENSE.md)
Zetashapes  |  [http://zetashapes.com/license](http://zetashapes.com/license)
Spielman & Singleton  |  [https://www.openicpsr.org/repoEntity/show/41329](https://www.openicpsr.org/repoEntity/show/41329)
El Instituto Nacional de Estadística (INE) | The National Statistics Institute (INE) of Spain includes data from multiple sources. If you are re-using their data, they explicitly require that you reference them accordingly<br /><br />[http://www.ine.es/ss/Satellite?L=0&c=Page&cid=1254735849170&p=1254735849170&pagename=Ayuda%2FINELayout](http://www.ine.es/ss/Satellite?L=0&c=Page&cid=1254735849170&p=1254735849170&pagename=Ayuda%2FINELayout)