BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//pretalx//talks.osgeo.org//foss4g-uk-2026//speaker//QMQUHV
BEGIN:VTIMEZONE
TZID:GMT
BEGIN:STANDARD
DTSTART:20001029T030000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:GMT
TZOFFSETFROM:+0100
TZOFFSETTO:+0000
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:20000326T020000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:BST
TZOFFSETFROM:+0000
TZOFFSETTO:+0100
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:pretalx-foss4g-uk-2026-NF3JBY@talks.osgeo.org
DTSTART;TZID=GMT:20261012T133000
DTEND;TZID=GMT:20261012T153000
DESCRIPTION:## **Abstract** \nHistorical maps are valuable resources for st
 udying long-term landscape\, settlement and environmental change\, yet tra
 nsforming 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 work
  with digitised Survey of India (SoI) map sheets (1905-1950s) using hands-
 on exercises. MAHSA is an ongoing collaborative documentation project at t
 he University of Cambridge\, funded by Arcadia. With more maps being made 
 available online\, navigating and applying historical maps in geospatial r
 esearch and documentation can be highly complex. This workshop provides a 
 practical end-to-end\, open-source workflow to access\, transform\, visual
 ise\, and organise historical maps using some of the latest geospatial tec
 hnologies\, such as IIIF\, STAC\, Cloud Optimized GeoTIFFs (COGs)\, Arches
 \, and QGIS.\n\nThe workshop is structured around three short hands-on exe
 rcises. 1) Participants will georeference a digitised map sheet from the [
 MAHSA Arches database](https://databasemahsa.org/)\, an open-source geospa
 tial database platform using the related IIIF URL from library repositorie
 s. 2) Participants will subsequently explore a STAC catalogue of publicly 
 released MAHSA maps\, filtering by map date and extent before loading sele
 cted Cloud Optimised GeoTIFFs (COGs). 3) Participants then learn how to re
 move sheet margins using the MAHSA SoI Map Clipper (an internally develope
 d open-source QGIS plugin).\n\nThe workshop concludes with a discussion of
  broader applications for historical map workflows and applications. Withi
 n MAHSA and beyond\, historical maps support applications such as automate
 d feature extraction\, long-term landscape and settlement analysis\, and m
 any other forms of spatial analysis. In the discussion\, we invite partici
 pants to provide feedback on how the presented tools might support differe
 nt research and public-facing uses. As well as reflect on the challenges o
 f IIIF and STAC to build sustainable infrastructure for the use of histori
 cal maps that can serve researchers\, organisations\, commercial users and
  the wider public.\n\n## **Prerequisites** \nA laptop with a browser\, an 
 internet connection\, and QGIS 3.44 (LTR) installed. Beginner-friendly\, b
 asic QGIS familiarity is assumed. No prior experience with IIIF\, Arches o
 r STAC is required.
DTSTAMP:20260821T115049Z
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
URL:https://talks.osgeo.org/foss4g-uk-2026/talk/NF3JBY/
END:VEVENT
END:VCALENDAR