OpenHistoricalMap
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Screenshot  OpenHistoricalMap coverage of Black Rock City in 2008 | |
Type of site | Collaborative mapping |
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| Available in |
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| Owner | Community-owned; supported by OpenStreetMap U.S.[2] |
| Products | Geographic data |
| URL | www |
| Commercial | No |
| Registration | Required for contributors, not required for viewing |
| Launched | 2013[3] |
| Current status | Active |
Content license | Various |
OpenHistoricalMap (also spelled Open Historical Map; 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 Whereas OpenStreetMap only includes data about the present day and deletes data as it becomes outdated, OpenHistoricalMap welcomes historical data from 4001 BCE (proleptic Gregorian) to the present[4] and preserves multiple copies of a feature as it changes over time. The project allows anyone with a free account to contribute directly to the map through a Web browser or the JOSM desktop application. The main project website visualizes the data on an interactive map of vector tiles filtered by time using a slider.
History
A group of OpenStreetMap contributors spun off the OpenHistoricalMap project in 2013.[3] Since 2017, the Oakland, California–based nonprofit organization GreenInfo Network has developed and maintained the project's technical infrastructure.[5] In May 2021, it became a charter project of OpenStreetMap U.S., a nonprofit local chapter of the OpenStreetMap Foundation.[2]
License
Individual features within the OpenHistoricalMap database are licensed independently. The project prefers that new contributions be dedicated to the public domain through a CC0 dedication.[6] However, as of February 2022[update], over 70% of map features in OHM are available under the Creative Commons Attribution-NonCommercial-ShareAlike license.[7] Virtually all of these features were imported from the Atlas of Historical County Boundaries, a project of the William M. Scholl Center for American History and Culture at the Newberry Library.[8]
The software that powers OpenHistoricalMap is available under the GNU General Public License.[9]
References
- ^ "config/locales at staging". work=OpenHistoricalMap/ohm-website. Archived from the original on October 18, 2021. Retrieved February 13, 2022 – via GitHub.
{{cite web}}: Missing pipe in:|work=(help) - ^ a b Cawley, Maggie (May 26, 2021). "OpenHistoricalMap Welcomed As An OSM US Charter Project" (Press release). OpenStreetMap U.S. Retrieved February 13, 2022.
- ^ a b Welty, Richard (October 8, 2021). OpenHistoricalMap - Historical Geography Wiki Style. WikiConference North America 2021. p. 6. Retrieved February 13, 2022 – via SlideShare.
- ^ Rademacher, Dan (June 17, 2020). "Set new min date on timeslider". OpenHistoricalMap/issues. Retrieved February 13, 2022 – via GitHub.
- ^ "An Open Data Map of World History". Oakland, California: GreenInfo Network. Retrieved February 13, 2022.
- ^ "Open Historical Map/OHM Basics". OpenStreetMap Wiki. September 3, 2021.
- ^ "license". OpenHistoricalMap Taginfo. Retrieved February 13, 2022.
- ^ "license=CC-BY-SA-NC". OpenHistoricalMap Taginfo. Retrieved February 13, 2022.
- ^ "LICENSE at staging". OpenHistoricalMap/ohm-website. Archived from the original on February 13, 2012. Retrieved February 13, 2022 – via GitHub.
External links
- Official website
- OpenHistoricalMap on the OpenStreetMap Wiki
- OpenStreetMap historic mailing list
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