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UID:pretalx-foss4g-uk-2026-NF3JBY@talks.osgeo.org
DTSTART;TZID=GMT:20261012T133000
DTEND;TZID=GMT:20261012T153000
DESCRIPTION:## **Abstract**\n\nHistorical maps are valuable resources for s
 tudying long-term landscape\, settlement and environmental change\, yet tr
 ansforming scanned sheets into analysis-ready GIS data remains challenging
 . Using materials from the [MAHSA project (Mapping Archaeological Heritage
  in South Asia)](https://www.mahsa.arch.cam.ac.uk)\, participants will wor
 k with digitised Survey of India (SoI) map sheets (1905-1950s) using hands
 -on exercises. MAHSA is an ongoing collaborative documentation project at 
 the University of Cambridge\, funded by Arcadia. With more maps being made
  available online\, navigating and applying historical maps in geospatial 
 research and documentation can be highly complex. This workshop provides a
  practical end-to-end\, open-source workflow to access\, transform\, visua
 lise\, and organise historical maps using some of the latest geospatial te
 chnologies\, such as IIIF\, STAC\, Cloud Optimised GeoTIFFs (COGs)\, Arche
 s\, and QGIS.\n\nThe workshop is structured around three short hands-on ex
 ercises. 1) Participants will georeference a digitised map sheet from the 
 [MAHSA Arches database](https://databasemahsa.org/)\, an open-source geosp
 atial database platform using the related IIIF URL from library repositori
 es. 2) Participants will subsequently explore a STAC catalogue of publicly
  released MAHSA maps\, filtering by map date and extent before loading sel
 ected Cloud Optimised GeoTIFFs (COGs). 3) Participants then learn how to r
 emove sheet margins using the MAHSA SoI Map Clipper (an internally develop
 ed open-source QGIS plugin).\n\nThe workshop concludes with a discussion o
 f broader applications for historical map workflows and applications. With
 in MAHSA and beyond\, historical maps support applications such as automat
 ed feature extraction\, long-term landscape and settlement analysis\, and 
 many other forms of spatial analysis. In the discussion\, we invite partic
 ipants to provide feedback on how the presented tools might support differ
 ent research and public-facing uses. As well as reflect on the challenges 
 of IIIF and STAC to build sustainable infrastructure for the use of histor
 ical maps that can serve researchers\, organisations\, commercial users an
 d the wider public.\n\n## **Prerequisites**\n\nA laptop with a browser\, a
 n internet connection\, and QGIS 3.44 (LTR) installed. Beginner-friendly\,
  basic QGIS familiarity is assumed. No prior experience with IIIF\, Arches
  or STAC is required.
DTSTAMP:20261023T002130Z
LOCATION:Think
SUMMARY:From archive to analysis: Historical maps in an open-source geospat
 ial stack - Petrus J. Gerrits\, Junaid Abdul Jabbar\, Jack Tomaney\, Charl
 otte Evans\, Junaid Abdul Jabbar
URL:https://talks.osgeo.org/foss4g-uk-2026/talk/NF3JBY/
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