[talk-au] Snapping Major regional roads to GPS traces

[Sebastian S.]

I recall they Strava heat map, have they fixed the resolution issue?
Last time I've tried to use it the high resolution or the heatmap required Strava log in and JOSM was not able to do that.

On 16 May 2021 6:05:16 pm AEST, Little Maps <mapslittle at gmail.com> wrote:
>Hi all, there’s a good primer on how to use the image offset database
>in JOSM here…
>
>https://learnosm.org/en/josm/correcting-imagery-offset/
>
>Bob, I doubt that the existing offset database will help you in central
>Qld, as there probably aren’t enough mappers who have used it in that
>region. I’ve tried to use the database in south-central NSW and I’ve
>never come across a saved offset for any imagery. If you don’t have an
>accurate base map like the NSW base map available, then, in the absence
>of any absolute measure of location accuracy, it’s difficult to know
>which imagery is best aligned, so you can’t really move the imagery and
>then upload the offset as you don’t know how good it really is. Vicious
>circle.
>
>I’ve found the Strava heat map a really useful overlay for aligning
>imagery as the number of users (and hence traces) can often be orders
>of magnitudes greater than that in the OSM gpx collection. To clarify,
>I don’t use it to map anything but instead use it to align the
>available imagery and then map from the imagery. But, once again, in
>very remote areas even this source may not provide much useful data.
>
>Cheers Ian
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