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UID:pretalx-foss4g-europe-2025-QWR3DV@talks.staging.osgeo.org
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DESCRIPTION:In a humanitarian context\, data collection can be divided into
  two main categories: proactive collection of data that may be useful for 
 disaster response and recovery\; reactive collection that is required to a
 ssess the situation on the ground during an event.\n\nThe Humanitarian Ope
 nStreetMap Team has supported both types of mapping through the Tasking Ma
 nager platform. Going forward we will also be able to collect drone imager
 y collaboratively and add collected field-data to complement and match to 
 the remote data\, with the Drone TM and Field Mapping TM (FMTM) respective
 ly.\n\nThere are often major hurdles for field-based data collection:\n1. 
 How to effectively collaborate with multiple data collectors at the same t
 ime.\n2. How to work when there is poor connectivity in an area.\n\nWeb ap
 plications may be an acceptable choice to solve the first issue\, but typi
 cally perform poorly when subjected to the second.\n\nWith a new paradigm 
 in web development\, local-first applications\, this may no longer be an i
 ssue.\n\nWe can develop web-based applications that allow for both:\n- Rea
 l-time update for users undertaking collaborative data collection campaign
 s.\n- Fully offline data collection capability\, with syncing and conflict
  resolution once connectivity is restored.\n\nThese capabilities have been
  achieved through some major landmarks over time:\n- Addition of WASM to t
 he browser in 2017.\n- Implementation of databases in the web-browser (SQL
 ite\, Postgres)\, using WASM.\n- Introduction of smart data reconciliation
  mechanisms such as CRDTs.\n- Continual improved access to mobile phones g
 lobally\, particularly in the introduction of high-performance smart phone
 s.\n\nThis talk explores our journey implementing a local-first field mapp
 ing flow\, with an example and demo to demonstrate its efficacy.
DTSTAMP:20260527T053249Z
LOCATION:CA01 (TomTom)
SUMMARY:Humanitarian data collection in browser-based Postgres - Sam Woodco
 ck
URL:https://talks.staging.osgeo.org/foss4g-europe-2025/talk/QWR3DV/
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