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UID:pretalx-foss4g-uk-2026-GM88ZJ@talks.osgeo.org
DTSTART;TZID=GMT:20261012T143000
DTEND;TZID=GMT:20261012T150000
DESCRIPTION:Power BI is one of the most widely deployed business intelligen
 ce platforms in UK public and private sector organisations\, yet its built
 -in and freely-available map visuals offer poor support for the British Na
 tional Grid\, UK-specific address locators\, or ONS administrative boundar
 ies - the everyday currency of UK geospatial analysis. The OS Power BI Map
  Visual was built to close that gap.\n\nUnder the hood\, the visual is a T
 ypeScript application built almost entirely on open-source geospatial libr
 aries: Leaflet.js for rendering\, Turf.js for spatial operations\, proj4 f
 or coordinate transformations (including OSTN15 datum shift between ETRS89
  and OSGB36)\, and shpjs and topojson-client for client-side geometry impo
 rt and parsing. It geocodes tabular data using UK-native identifiers - pos
 tcodes\, UPRNs\, Eastings/Northings\, and GSS statistical codes - the last
  of these automatically resolving to the corresponding ONS boundary (LSOAs
 \, MSOAs\, wards\, local authorities\, and many more) by querying the ONS 
 Geoportal directly\, with no boundary file management required from the us
 er.\n\nThe visual supports choropleth and point maps\, custom geometry upl
 oad (GeoJSON\, WKT\, TopoJSON\, shapefile)\, and two-way cross-filtering w
 ith other Power BI visuals. All of this runs inside Power BI's sandboxed c
 ustom visual API - a constrained environment that creates its own engineer
 ing challenges.\n\nOrdnance Survey has released the visual as open source 
 under an MIT licence. In this talk we will show what it does\, sketch the 
 FOSS architecture that makes it work (as well as the places where non-FOSS
  tools are used)\, discuss design decisons we made\, present a live demo\,
  and invite the community to use\, fork\, and contribute.
DTSTAMP:20260821T234530Z
LOCATION:Create 2
SUMMARY:FOSS Geospatial Inside a BI Box: The OS Power BI Map Visual - Harry
  Gibson\, Mel Marochov
URL:https://talks.osgeo.org/foss4g-uk-2026/talk/GM88ZJ/
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