Spatial data of all city of Edmonton building roof-lines as of May 2017.
Splitgraph serves as an HTTP API that lets you run SQL queries directly on this data to power Web applications. For example:
curl https://data.splitgraph.com/sql/query/ddn \ -H "Content-Type: application/json" \ -d@-<<EOF {"sql": " SELECT * FROM \"edmonton-ca/building-footprint-6n9r-ddf8\".\"building_footprint\" LIMIT 100 "} EOF
See the Splitgraph documentation for more information.