In addition (I can't find the link now but) I recall reading about the
death of a hiker or climber who used some app which used OSM data, and
the app didn't distinguish between track_types (or there was no
track_type data for that route), so the hiker presumed it was OK to go
on, and subsequently died.
On 18.07.20 16:01, Andy Townsend wrote:
On 18/07/2020 11:53, Michael Reichert wrote:
I do not believe that one can add reliable tracktype=* information from
satellite imagery without having some ground truth knowledge in order to
know how to interpret the imagery in that region.
I think that "without having some ground truth knowledge" is the key
part there. I know from personal experience that if I was to try and
add tracktype or detailed surface information based purely on imagery
I'd get it wrong lots of the time. Very often when I'm updating OSM
I'll add the details that I recorded while I was there, and look at what
they say and what it looks like on the available imagery and the two can
be very different.
Best Regards,
Andy
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