In the past month, the #OpenHistoricalMap community added 49,939 dated elements, 5,965 buildings, and 293,247¼ railroad miles. The average age of a dated element fell by 14 months, and the average year shifted over 6 months later. All this with the help of 31 new contributors – welcome!
https://wiki.openstreetmap.org/wiki/OpenHistoricalMap/Statistics
@CharliePlett option to import green squares from #OpenHistoricalMap to OpenStreetMap? 
#mashup
My OpenStreetMap daily edit graph has taken a beating since I started mapping exclusively on OpenHistoricalMap.
In the past month, the #OpenHistoricalMap community added 50,639 dated elements, 5,919 buildings, and 3,996¼ railroad miles. The average age of a dated element fell by 15 months, and the average year shifted 9 months later. All this with the help of 25 new contributors – welcome!
https://wiki.openstreetmap.org/wiki/OpenHistoricalMap/Statistics
The #VectorMaps branch of @openrailwaymap has started double-tracking #OpenStreetMap and #OpenHistoricalMap data. Finally – appreciate #AbandonedRailways in the proper setting!
https://forum.openhistoricalmap.org/t/openrailwaymap-adds-openhistoricalmap/446
The official #OpenHistoricalMap account on #Bluesky is now https://bsky.app/profile/openhistoricalmap.org/ (renamed from ohmap.bsky.social). We created the new account because ohm.mapstodon.space.ap.brid.gy was read-only – we couldn’t repost or reply to anyone using #BridgyFed.
But we’ll keep posting to Mastodon too. Open data projects love open source projects, and historians love to write more than 300 characters at a time!
@aoppo whipped up a user script to easily navigate #OpenHistoricalMap while reading a #Wikipedia article. You can install it in your personal Wikipedia account:
https://globstory.it/wikipedia-user-script/
It’s one of many ideas for cooperation between the OHM and #Wikimedia communities:
Boosting my meandering thread about the Clifton Estate, Nottingham https://en.osm.town/@SK53/114177519300555515
The thread so far covers location, the area before development and the evolution of road links plus odd asides and various #OpenStreetMap related stuff. Some material would also be useful grist for #OpenHistoricalMap
I'm about to move on to the construction of the estate.
地理院標準地図がいつまでも古い建物を残していることを逆手にとって #OpenHistoricalMap に今はないヨーカドー（末期はザ・プライス）を描いてみた
In the past month, the #OpenHistoricalMap community added 49,375 dated elements, 5,757 buildings, and 2,615 railroad miles. The average age of a dated element fell by almost two years, and the average year shifted one year later. All this with the help of 18 new contributors – welcome!
https://wiki.openstreetmap.org/wiki/OpenHistoricalMap/Statistics
Our #OSMCha instance makes it easy to inspect large changesets for subtle changes. Sometimes, those changes look very wrong, but only because modern aerial imagery doesn’t line up with the historical features being mapped.
Now you can visualize changesets against existing #OpenHistoricalMap coverage to see how it all fits into the map we’re building. Click the 
button to set the basemap back to #Mapbox or #BingMaps imagery like before.
Territorial evolution of #Italy, 1861–2025, by Wikimedia Commons user “Nuclear Chain Reaction” based on #OpenHistoricalMap and #NaturalEarth data
https://commons.wikimedia.org/wiki/File:Territorial_evolution_of_Italy,_1861–2025.webm
Despite all the mega boundary mapping lately, our map just got a lot leaner and faster. Map tiles have shrunk by as much as 96% compared to last year! #MicDrop
Also in this month’s update, some nice tweaks and additions to the main style and a proper sendoff to @run_for_funner:
https://forum.openhistoricalmap.org/t/better-performance-less-clutter-and-the-end-of-an-era/426
been a while since i put a new #GhostTrack into #OpenHistoricalMap, but today i added Victoria Speedway, a clay oval that started as a horse track and ran cars from 1960-1966 near the #CapitalDistrict of #NewYork . link is to my website, showing the track overlaid on #OpenStreetMap #AutoRacing #MotorRacing #History
Thanks to @bmacs001, #OpenHistoricalMap has comprehensive coverage of #NewJersey municipality boundaries over time. Watch the state get divvied up into counties, townships, boroughs, cities, towns, and villages in this mesmerizing #TimeSeries:
In the past month, the #OpenHistoricalMap community added 33,818 dated elements, 3,899 buildings, and 3,121 railroad miles. The average age of a dated element fell by one week, and the average year shifted one month earlier. All this with the help of 14 new contributors – welcome!
https://wiki.openstreetmap.org/wiki/OpenHistoricalMap/Statistics
In the past month, the #OpenHistoricalMap community added 62,726 dated elements, 9,621 buildings, and 5,324½ railroad miles. The average age of a dated element fell by about two years, and the average year shifted about one year later. All this with the help of 29 new contributors – welcome!
https://wiki.openstreetmap.org/wiki/OpenHistoricalMap/Statistics
Aujourd'hui, je m'invite à voyager dans le temps sur #OpenStreetMap. Il s'agit du projet #OpenHistoricalMap (@ohm), voir le petit lien en bas à droite de la page.
If you edit #OpenHistoricalMap in #JOSM or browse the map in #DarkMode, pay attention to this month’s website upgrade:
https://forum.openhistoricalmap.org/t/more-secure-logins-dark-mode-and-more-predictability/397
@mvexel when we started talking about finding an umbrella for #OpenHistoricalMap we briefly considered the linux foundation, but it became clear almost instantly that with the Charter projects framework, OSM US was a better choice in every way. it was not particularly obvious what the linux foundation was really about at the time.
