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OpenHistoricalMap

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Also known as Open Historical Map, OHM, OpenHistoricalMap®, OpenHistoricalMap project, Open Historical Map project, OHM project

OpenHistoricalMap (also spelled Open Historical Map and abbreviated OHM) is an online collaborative mapping project developing a historical map of the world using OpenStreetMap technology and processes. Whereas OpenStreetMap only includes data about the present day and deletes data as it becomes outdated, OpenHistoricalMap welcomes historical data and preserves multiple copies of a feature as it changes over time. The OpenStreetMap community views OpenHistoricalMap as an outlet for keeping outdated names out of OpenStreetMap, where they could cause misunderstanding.

Described at

OpenHistoricalMap - OpenStreetMap Wiki

wiki.openstreetmap.org

OpenHistoricalMap goes beyond the present, mapping places throughout the world… throughout the ages. No community is too small, no story too obscure to add to this map. Everyone has something to contribute, including you! Go to the main map and navigate to a place and time of interest using the time slider. Share the map to spread the word about our project. Explore the many ways you can reuse OpenHistoricalMap in your own storytelling and software projects. Left: The Choongwan district of the City of Victoria in Colonial Hong Kong as of 1800. Right: The same location today. The Malad Valley Railroad is completed between Tremonton and Brigham City, Utah. The 1,300-year-old village of al-Tira , Haifa, Mandatory Palestine, is depopulated during the Palestine war. Our tagging pages more consistently link to other OHM tagging pages instead of often conflicting OSM tagging pages. The tile server has migrated from Tegola to Martin "Martin (tile server)") for improved reliability and performance. OpenHistoricalMap Quality and Coverage Stats is a new dashboard for tracking common errors in OHM data.

Excerpt from a page describing this subject · 29,110 chars · not written by Vinony

Wikidata facts

Official name
OpenHistoricalMap
Image
San Agustin Church, Manila, in 1900 in OpenHistoricalMap.png
Show 16 more facts
inception
2013-00-00
social media followers
667
Commons category
OpenHistoricalMap
name
Open Historical Map
short name
OHM
official forum URL
forum.openhistoricalmap.org
service status information URL
stats.uptimerobot.com/0BBDoIkXKJ
number of registered users/contributors
1584
Sources (15)

via Wikidata · CC0

~7 min read

Article

11 sections
Contents
  • History
  • Participation
  • Contents
  • Data model
  • Coverage
  • Usage
  • Licensing terms
  • See also
  • References
  • Further reading
  • External links

OpenHistoricalMap (also spelled Open Historical Map and abbreviated OHM) is an online collaborative mapping project developing a historical map of the world using OpenStreetMap technology and processes. Whereas OpenStreetMap only includes data about the present day and deletes data as it becomes outdated, OpenHistoricalMap welcomes historical data and preserves multiple copies of a feature as it changes over time. The OpenStreetMap community views OpenHistoricalMap as an outlet for keeping outdated names out of OpenStreetMap, where they could cause misunderstanding.

== History ==

Available in 4 languages

via Wikidata sitelinks · CC0

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