David Earl [mailto:[EMAIL PROTECTED] wrote: >Sent: 12 May 2008 11:06 PM >To: Andy Allan >Cc: Andy Robinson (blackadder-lists); [email protected] >Subject: Re: [OSM-talk] [OSM-dev] Developers requested to help provide >"completeness" tools > >On 12/05/2008 22:51, Andy Allan wrote: >> On Mon, May 12, 2008 at 8:16 PM, David Earl <[EMAIL PROTECTED]> >wrote: >> >>> I think it is terribly hard to know whether you have all the footpaths, >>> and I think we'd hardly ever mark anywhere "complete" if we did that. >> >> I think it's terribly hard to know when a map is correct and complete, >> regardless of what you're considering. > >There will always be some unintentional errors, but I am confident >enough of mapping villages and sections of towns systematically to be >able to assert that I have completed it to that measure of completeness >- that I have visited every street and got every name possible. (But I >don't mind using some other word for it if you like, e.g. a confidence >level or some such).
+1, I don't mind what words we use either. > >I think I would have a much harder time being systematic about >footpaths, especially the rural ones, so I wouldn't have the same degree >of confidence in my mapping of a footpath network. Maybe if that's what >I specialised in my confidence would grow, but the concept of junctions >where you can note the other routes from from need attention seems a >much less well defined concept for footpaths. > >But the main point about footpaths is that using that as the only >measure would be very dispiriting because it would be so hard to >complete any reasonable areas to that standard, and completeness at the >street level is very useful for lots of purposes that doesn't require >footpaths so is worth showing to consumers. So maybe we have a list of all the main way types (highway, waterway etc) and we put a completeness level/confidence level on each one. Too many though and contributors will loose interest. Perhaps just: Roads Cycleways/Bridleways Footways Rivers/Major Streams/Canals Railways Cheers Andy > >David > _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
