It is considered that attribution requirement is met by this page: http://wiki.openstreetmap.org/wiki/Contributors <http://wiki.openstreetmap.org/wiki/Attribution>The source tag on data items(ways, nodes) does help in allowing you to find which items were copied/derived form OSSV(etc), but it is also very very helpful for other mappers to know how a good outline of a lake is in OSM or why a road has a wiggle that your GPS trace doesn't. If there is no source tag then you have to assume the user had good data to work with (e.g. actual ground surveying) or you have to contact them t clarify it.
It is often done that POIs can be placed based on the road network already in OSM(helps for those without GPS). It's silly to put a source=self (aligned to existing data) tag. But say you know a footpath goes around a lake you could put "note=local knowledge and rough location, based on lake position" which allows another mapper to come along and adjust the path position because she got a good GPS track for the footpath. With this in mind I would avoid changing the position of items to align with OSSV, aerial imagery, or anything other than ground surveying. Seeing things on the ground is our best way to be sure of how the object is and that it is up to date. Unless of course you know a shop recently moved location or a footpath has been closed and diverted. On 9 June 2010 11:05, Graeme Wilford <[email protected]> wrote: > All this talk about licensing and attribution caused me to question the > following: > > If I modify existing (or add new) OSM primatives using other primatives as > a guideline and the guiding primatives are attributed, my changes might be > considered derived works. Should the attribution be inherited? > > To give a couple of simple examples; > - a building shape is added from, say OSSV and appropriately attributed and > then I move an existing POI (or apply a new one) on to the building > - a lake is added from say, OSVM or an aerial survey and I draw a new or > re-align an existing footpath around the lake > > Any views? > > Thanks, > Wilf. > > m...@home > > http://facebook.com/gwilford > > _______________________________________________ > Talk-GB mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk-gb > > -- Gregory [email protected] http://www.livingwithdragons.com
_______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
