W3C

– DRAFT –
Web-based Digital Twins for Smart Cities IG

24 March 2025

Attendees

Present
Kaz_Ashimura, Kunihiko_Toumura, Linda_van_den_Brink, Michael_Koster, Michael_McCool, Tomoaki_Mizushima
Regrets
-
Chair
Koster
Scribe
McCool, kaz

Meeting minutes

Logistics

Koster: any cancellations we know of coming up?

Kaz: was conflict with Nordic CG on third monday of the month, so propose shifting this meeting to fourth month
… would like to confirm

McCool: I think you need to send an email for that, too

Kaz: did, so should do it again

McCool: next week DST will be done, finally

Koster: note April will have five Mondays, also

Kaz: should be April 21 :)

[ Kaz: Very sorry but apparently both I and Koster were a bit confused, and actually April 2025 has only four Mondays (=7, 14, 21 and 28). So the next meeting will be April 28 instead of April 21. ]

Minutes

Feb-17

<McCool> https://www.w3.org/2025/02/17-smart-cities-minutes.html

Koster: (scans minutes, summarizes main points)

Koster: discussed logistics, including repo, deliverables
… reviewed charter
… resolution to create a repo, that has now been done
… for requirements, user story format suggested

Feb-18

<kaz> https://www.w3.org/2025/02/18-smart-cities-minutes.html

Koster: this was more Asia-friendly timeslot
… however, we agreed going forward to combine meetings
… we have to generate a Team Report

McCool: is there a deadline for the Team Report/

Kaz: end of charter, July 2026, but good question; not tight, but we could define some milestones

Koster: can put it in the agenda for now; may also want to consider a White Paper

Kaz: I can create an initial schedule.md in the repo

Koster: ok, sure

ACTION: Kaz to create a schedule page on GitHub

Koster: convergence of grid; also saw this topic show up in meeting with Nordic CG
… converges with smart building topic, energy use, etc.

Koster: gap analysis would be useful

Koster: one pager

Koster: any update to the minutes? If not, I would like to propose we adopt and publish them.

Koster: ... no objections heard.

Koster: not sure where we put things like the gap document

McCool: suggest chairs should review the minutes before the meeting and add such things to the agenda

GitHub updates and resources

McCool: resources page:
https://github.com/w3c/smart-cities/blob/main/resources.md

Koster: list of relevant W3C and other groups

Koster: need to consider interoperability, e.g. for geolocation, datasets, etc; also privacy principles

McCool: need to better organize this; very long. Prioritize, group by categories?

Kaz: right. this big list was copied from the IG Charter, and we should think about priority categories first, then which group to be included in which category next

McCool: digital twin would be another category
… would require sensor data, etc.
… probably we need to clarify use cases as well

McCool: suggest we focus on digital twins, generate use cases, use that to prioritize

Kaz: may also be useful to look at external organizations first

McCool: starting with digital twin concept, we need to think about what kind of "modelling" we need
… e.g. geospatial data, relationships and entities (aka LD), time series and numerical data (e.g. IoT sensor data)
… and what "web" is used for e.g. visualization (webGPU, vector graphics, etc)

Kaz: right. reminded me of the great session about SVG Map for evacuation purposes during the AC2024 in Hiroshima.

Koster: issues like IoT interfaces, ontologies, etc.

McCool: I think we need a short list of high-level categories, maybe 5 or so, and organize things under that

Koster: what about standards?

McCool: SDOs work on lots of things, we should cite specific standards, not orgs...

Kaz: could create another md file for technology categories
… could think about which SDO is working on which categories

McCool: makes sense

Koster: good place to start

<kaz> technology-categories.md

Koster: as mm said, we need to pick a small number of "focus areas"

McCool: suggest we brainstorm right now in the PR, then people can comment offline

McCool: suggest create a PR so we can comment and propose updates

PR 1 - Update technology-categories.md

Kaz: let's continue the discussion on GitHub using the PR 1 above
… then we can talk about that during the next call

[adjourned]

Summary of action items

  1. Kaz to create a schedule page on GitHub
Minutes manually created (not a transcript), formatted by scribe.perl version 244 (Thu Feb 27 01:23:09 2025 UTC).