I want to write a web app, which needs to know the exact path of a certain road, e.g. the german Autobahn A7.<br> The minimum requirement for the data is a list of locations, forming a polyline, which approximates the road with an accuracy of 10 - 15 meters. Optionally extra data like junctions, exits, tunnels, bridges and road km would be fine. Altitude would be great. So, the questions are: - Is it possible? (It really should be) - which data source is preferable: - http://xapi.openstreetmap.org/api/0.6/ - http://open.mapquestapi.com/xapi/api/0.6 - http://nominatim.openstreetmap.org/ - others? What would the query look like? Addition: it is not a required that the data is queried live from the app - it would be perfectly ok that the query is done beforehand and formatted and stored in a database

I want to write a web app, which needs to know the exact path of a certain road, e.g. the german Autobahn A7.<br> The minimum requirement for the data is a list of locations, forming a polyline, which approximates the road with an accuracy of 10 - 15 meters. Optionally extra data like junctions, exits, tunnels, bridges and road km would be fine. Altitude would be great. So, the questions are: - Is it possible? (It really should be) - which data source is preferable: - http://xapi.openstreetmap.org/api/0.6/ - http://open.mapquestapi.com/xapi/api/0.6 - http://nominatim.openstreetmap.org/ - others? What would the query look like? Addition: it is not a required that the data is queried live from the app - it would be perfectly ok that the query is done beforehand and formatted and stored in a database

I want to write a web app, which needs to know the exact path of a certain road, e.g. the german Autobahn A7.<br> The minimum requirement for the data is a list of locations, forming a polyline, which approximates the road with an accuracy of 10 - 15 meters. Optionally extra data like junctions, exits, tunnels, bridges and road km would be fine. Altitude would be great. So, the questions are: - Is it possible? (It really should be) - which data source is preferable: - http://xapi.openstreetmap.org/api/0.6/ - http://open.mapquestapi.com/xapi/api/0.6 - http://nominatim.openstreetmap.org/ - others? What would the query look like?