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01:18:09  <substack>mikolalysenko: I've got the initial piece for healpix grid partitioning, but I will need to generate lon/lat polygon geometry from these to pass to osmconvert -b
01:19:31  <substack>robertkowalski: I've been in the high desert near anza, ca working remotely on offline p2p maps
01:20:48  <mikolalysenko>are you trying to convert the healpix quadtree cells into lat-lon coords?
01:21:29  <mikolalysenko>doesn't sound so bad but there might be some messy details around the boundaries since the preimage of a healpix polygon would have curved edges in general when converted to lat-lon
01:21:39  <mikolalysenko>you could always make it work by just refining the hell out of it
01:21:58  <mikolalysenko>but there might still be lurking numerical problems near the interface between cells
01:25:44  <substack>yes I'm expecting as much
01:26:02  <substack>I could also write my own, healpix-aware filtering in c++ or modify osmconvert
01:26:59  <substack>hmm now that I write that out it seems like the obvious way to procede
01:27:50  <substack>but the upside of all this work is that the final product will work well for any map projection, including 3d
01:54:14  <mikolalysenko>modifying osm convert might not be too bad
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