On 26/02/16 11:23, David Woolley wrote:
On 25/02/16 17:04, Nick Whitelegg wrote:
User can also enter relevant POIs like stiles, gates etc when they are
encountered.
When user returns home, track simplification algorithm used to make a
way from the GPX trace and tags it with the tags equivalent to the
ROW type.
User downloads data from OSM and algorithms are used to auto-join the
user's new ways to existing ways where appropriate (or alternatively,
the user does this manually)
This might have been a good idea in the early days, when most mapping
used GPS and most mapping was onto an empty map. These days, I think
it would just cause problems as it would probably delay the proper
association of the GPS tracks with, more accurate, aerial imagery
data, and would not properly account for features that had already
been mapped, but possibly on a different, or more accurate datum.
I disagree. GPS traces can only be found by being on the ground. Aerial
imagery is useful but being there and seeing what is really on the
ground is still the gold standard in my view. Aerial imagery is not
guaranteed to be well aligned, is guaranteed to be be steadily more and
more out of date and gives no clue about what signs say. Mapping by
surveying gives such a good understanding of what is really there that
it is the best way to integrate your new stuff and perhaps correct what
may have been added by the folks who have gone before.
--
Cheers, Chris (chillly)
_______________________________________________
Talk-GB mailing list
Talk-GB@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-gb
