The website hasn't quite caught up yet: just awaiting approvals before we jump straight to publishing a 3.2 release, complete with a Reconciliation API, hopefully in the coming week.

Thank _you_ for entrusting this exceptionally challenging and rewarding project to me, @kgeographer.bsky.social !

This week's fungi for #FungiFriday.

Today I start my research trip sailing down the River Seine from Paris to Honfleur (via a few stops) in a reconstruction of the Klåstad cargo ship built in 998. It’s the penultimate stage in the ship’s journey from Rome to London throughout the summer. I’ll post updates as we go #Saga25 #MedievalSky

Sounds amazing!

I'm curious to see how closely the cross-Channel route and timing match this 4-or-5-day wind-and-current-based prediction from docuracy.github.io/Historical_S...

Hours of fun spent realigning my foolishly London-centric assumptions about medieval European trading networks. Shetland, for example, was far from peripheral: a non-Mercator map-projection helps.

I've rebuilt the journey-timed, square-rigged sailing algorithm for docuracy.github.io/Historical_S...

That's not what I see. Apply those unemployment rates to mid-career wages and it's evident that humanities are not a "safe financial bet". The situation is even worse when you factor in underemployment and investment in graduate degrees.

Thanks, @drpda.bsky.social, this looks like a really useful source, as it includes dates and waypoints for a number of long-distance voyages. 👏

I'd love to get hold of Paula Martin's transcript, though: any suggestions of how I might do that?

🌍 Ports are now (optionally) shown on the eRutter to help with route picking.

🤔 They're currently fetched from @wikidatacommunity.bsky.social, but this would be a great use case for a @whgazetteer.org temporal API to filter out modern ports and highlight ancient ones.

... docuracy.github.io/Historical_S... [4/3!]

... 📖 All of the code for extending coverage can be found together with an outline of the methodology at github.com/docuracy/His.... [3/3]

... 📱It works better on mobile devices now too, using Mercator projection instead of globe, and with an initially-minimised Options panel. The routes and all parameters used can be exported for use in other GIS applications. [2/3]

🪄Historical Sea Routing is now much quicker to load, reload, and compute seasonally-plausible sailing routes, thanks to some behind-the-scenes browser magic. Find a 6500-mile return trip in under 1 second!

🛟 Do you have historical voyage data which might help with calibration? [1/3]

🌍 I've just published this here docuracy.github.io/Historical_S... for anyone to play with.

Screenshots, code, and caveats at github.com/docuracy/His....

... Time of year makes a big difference too.

Monthly-weighted graphs are switched and new routes computed in less than half a second, all within the browser.

... I need yet to tune the weighting of various parameters, but it’s striking how the same principles that shaped trans-Atlantic triangular trade routes in the age of sail apply on a more local scale too: prevailing winds, swell, waves, and currents all make return routes diverge from outbound ones.

... Inspiration:
doi.org/10.1057/s415...
doi.org/10.1515/9783...

Data sources: @copernicusecmwf.bsky.social, @copernicusmarine.bsky.social

... 🌊Each cell now has bathymetry and DEM-based clear-weather land-visibility data; also month-wise indicators of hourly-average wind, waves, surface current, and nocturnal+meteorological attenuation of visibility.

Thanks to @viabundus.bsky.social and @alexislitvine.bsky.social for inspiration!

... using this graph of interconnected H3 (Hexagonal Hierarchical Geospatial Index) cells, I've computed and plotted a speculative historical sea route from Kilcolgan Castle to Faxfleet in under 2 seconds, all running in the browser. No server infrastructure or internet connection needed! ⛵

🧭 Building a lightweight sea-routing graph for historical GIS & DH use cases beyond simple port-to-port hops. Edges are weighted for ~5km coastal preference. Aiming for serverless exploration of connectivity in historical maritime trade. ⚓️ #MaritimeHistory #HistoricalGIS #DigitalHumanities

Want to work with the WHG team? The Institute for Spatial History Innovation @ Pitt is hiring a full-time Research Associate to be the Digital Data Specialist & Managing Editor of World Historical Gazetteer!

Learn more & apply by July 11: bit.ly/4kAknki

@rmostern.bsky.social @docuracy.co.uk

My understanding is that in respect of markets and fairs such charters granted rights rather than obligations. Historical legal sources (e.g. Chitty, 1820) focus on forfeiture for misuse rather than non-use: there was not legal compulsion to operate what became unprofitable or impractical.

Medieval England’s Road Network Mapped Using the Gough Map.
www.medievalists.net/2025/05/medi...

... although it picks out the Great Eastern lines very clearly.

🤔 Nothing obvious c.1900: maps.nls.uk/projects/os1...