On Fri, Jul 20, 2012 at 7:51 PM, Paul HAYDON <[email protected]> wrote:
> Hello all, > > A couple of comments regarding recent posts: > > > Date: Fri, 20 Jul 2012 07:21:38 -0400 > > From: Richard Weait <[email protected]> > > To: OSM Australian Talk List <[email protected]> > > Subject: Re: [talk-au] Redaction progress > > > >... > > > What's worse - a town that is perfectly mapped but 100m, or > > > the same town not mapped at all? > > > > Well, this is OSM, so there will be well reasoned arguments for both > > of the alternatives that you present and several that we haven't > > imagined. :-) > > > > Best regards and happy mapping, > > Richard > > As Richard says, there will be arguments for and against. Just an > observation on my part, but be wary - in my experience (in industry) > temporary fixes which are put in place can often be left "as-is" later on, > despite that never being the intention at the time of implementation. If we > map with known errors, how are their updating/correction going to be managed? This is a discussion that comes up in OSM fairly often. It can be ably and entertainingly argued over a few beverages. Often the topic is framed as "even a bad import is better than no data in specific-area-of-interest". The question of how to update or correct that data is also largely unsolved. Ideally the answer is, "future mappers will fix it" but practically that seems too happen less-often than we would like. An example is the TIGER import in USA, where some areas have the known-imperfect data, untouched after a few years. > Perhaps a tag to identify them if known/suspected errors are included, or > simply to be verified? Sure. Tags on the object or on the changeset can help other mappers or your future self understand the limitations of your earlier mapping. As an example, I've mapped shopping malls based on rough, hand sketched outlines, and left a note like "building positions are estimated". Later trips with a GPS to verify, or after improve imagery becomes available make it possible to improve the data. That's a slightly contrived example of the data being provided with known deficiencies, then improved later. This seems to be the limit of the scale where this works; within the natural range of a local mapper. Best regards and happy mapping, Richard _______________________________________________ Talk-au mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-au
