dalle FAQ ( http://www.geogratis.ca/geogratis/en/faq.html ) c'è qualche punto particolarmente interessante:
Q: What is the liability of the Government of Canada respecting data use?
A: The Government of Canada shall have no liability for any damage caused by the use of the data. Neither shall the Government have any liability for the use made of the data.
Q: What rights come with an unrestricted-use end-user licence?
A: An unrestricted-use end-user licence allows the licensee to use, incorporate, grant end-user licences to, modify, improve, develop and distribute the data. The licensee must, however, identify the source of the data on his derived products.
Q: Can I buy GeoGratis data on CD-ROM?
A: GeoGratis operates on a model that minimizes operating costs. The portal has no infrastructure for distributing data on storage media. Geomatics companies can download and convert the data and burn them on CD-ROM for you.
chi sa se conviene di più il sistema a WMS o con ZIP...
ominiverdi presenti, per quanto possibile