Yes, I linked to Ohsome Dashboard earlier as a crude estimate. However, what I’d like to do is to query for crossing=zebra
in 2018, then see how many of those got converted to crossing:markings=zebra
versus some other crossing:markings=*
value. Ohsome can’t distinguish these cases from crossings that currently have crossing:markings=*
but never had crossing=zebra
in the first place.
Overpass can get halfway there with its diff mode and compare
statement, but I haven’t figured out how to performantly track the replacement of one tag with another on the same set of features. Still, hopefully my estimate demonstrates that crossing=zebra
can refer to a variety of marking patterns, requiring us to proceed more carefully.