[josm-dev] The Golden Rules

Martin Koppenhoefer dieterdreist at gmail.com
Sun Aug 25 10:00:28 UTC 2013


2013/8/24 Bryce Nesbitt <bryce2 at obviously.com>

> We're encouraged by project consensus to map areas based on Bing maps
> alone, for example.
>


are we? Can you point me to a place in the wiki where this is the case? I
always thought of aerial imagery as an additional source for mapping, not
necessarily the only one, (I admit I also have mapped sometimes based on
aerial imagery alone, but I didn't feel like I was doing a perfect mapping
in these cases).



>  Is that knowledge?
>


no, it clearly isn't.



> Are map notes left by visitors to OpenStreetMap knowledge?
>


in most cases they are, in the end the mapper will have to decide if he can
trust them or not.



> How about incorrect or misspelled attributes left by other mappers: is that
> sort of like looking at Bing?
>


this also is a gray area, it already happened to me that other mappers
thought of (intentionally set) tags to be incorrect or misspelled and
corrected them according to their interpretation (e.g. a bridge-area tag I
invented to group bridge elements was misinterpreted). Often it would be
better to keep stuff, because how could evolve new mapping schemes if
everything is instantly turned into "standard" tags by leaving no trace of
the new tags.

"knowledge" is having been to a place and know what was there at that time,
survey is going there right now and see what is currently there.

cheers,
Martin


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