James, I am sure there are other examples of things that can't be easily mapped by humans walking, cycling and kayaking around (drains, underground tunnels and long lines of electricity pylons spring to mind). Luckily street maps don't usually depend on these things to be useful.
PY On Fri, Dec 11, 2009 at 10:26 AM, James Livingston <doc...@mac.com> wrote: > On 11/12/2009, at 8:02 PM, Elizabeth Dodd wrote: >> so we don't need imported data? > > In most cases we don't need imported data, but it can be useful. For example > rather than painstakingly crafting the entire coastline of Australia from a > few GPS traces and a lot of imagery (much is relatively inaccessible), we can > import it from someone's dataset and spend that large amount of time doing > other things to improve OSM that we can't import data for. > > There are also some things where importing external datasets is the *only* > way to get it into OSM. For example boundaries of areas that have no physical > edge, just a (not necessarily straight) line on someone decided on at some > point in time. > > _______________________________________________ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > -- Tel: +44(0) 7814 517 807 _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
