I Need place roof polygon co-ordinate

Hello,

I have use nominatim API but this will return wrong polymor coordinate.

For example http://open.mapquestapi.com/nominatim/v1/search.php?key=JY2R1bjKqLKmmPFy6gZGv7sGm8mZODhf&format=json&q=9145 Gaspard Ct, Frisco, TX, USA&addressdetails=1&limit=1&polygon=1

Please Reply me fast. Thank You in Advance