On Mon, Mar 09, 2020 at 05:08:10PM -0700, Michal Migurski wrote: > Hi everyone, > > I’m writing to let you know about a new OpenStreetMap project Facebook > just released. It’s called Daylight Map Distribution. Daylight is a > complete, downloadable preview of OpenStreetMap data we plan to start > using in a number of our public maps:
I think its a humble approach to try to identify (un)intentional bad edits. A lot of people try to deal with this. I am doing a lot of QA myself and i look at OSMCha changesets in my greater surrounding on a daily basis. I fail to see a sane technical way of producing consistent map data out of some intermingled data of which some changesets have been flagged/removed. I heard Mapbox is working on this and divide data spatially not as a sequence of changeset. My impression would be that this way you could produce a "nice looking map" but most likely it will break for routing purposes in most horrible ways where ways suddenly are not connected anymore as some changeset inbetween has been withdrawn/rejected. So i'd guess the way you and IIRC Mapbox try to solve the vandalism/bad edit issue is a labour and machine learning intensive task which you cant win. Once you eliminate changesets you fall behind and you pile up inconsistencies. This is, i guess, the reason for your "one shot" dump of your current internal state. So from my perspective the vandalism/bad edit issue will only be fixable if we have some review process (Not that i would suggest one) for strictly sequential changesets where review must be in order and a once rejected/withdrawn changeset can only be requeued not put in that sequential place again. And even then you'll see vandalism sneak by with innocent looking edits or intentional 3rd party validation. So i'd love to hear more thoughts about long term ideas how to solve this in a collaborative manner. OSMCha is probably not the final solution but currently it brings together analysis, be it human or machine learning in a transparent way, not that it currently has an impact on the main OSM database. Flo -- Florian Lohoff [email protected] UTF-8 Test: The 🐈 ran after a 🐁, but the 🐁 ran away
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