Re: [webvmt] Status Update

Rob,

Thanks for your message about GeoPose.

1. I notice that the OGC Building Block wrappers refer to the draft GeoPose spec. I recommend that you update these to reference the OGC GeoPose Standard document [1] instead.

2. WebVMT is a current work item in scope for SDW - as previously agreed in the rechartering discussion [2]. SDW published a W3C Group Note [3] (OGC 23-027) in September 2023. Development is ongoing in collaboration with several OGC SWGs and W3C WGs including GeoPose, Moving Features and WICG DataCue [4], though these disparate topics are drawn together in SDW.

3. On the subject of ‘alignments’, a new heading attribute was developed and prototyped in Testbed-19 [5] which is aligned with GeoPose. This is designed to integrate with HTML and includes features such as heading and missing data which are beyond the current scope of GeoPose 1.0. WebVMT heading data were published in the T19 Hillyfields Bubble repo [6] under an open licence and this feature was developed further in Testbed-20.

4. I recommend posting future GeoPose discussion issues directly to the SWG mailing list at geopose.swg@lists.ogc.org <mailto:geopose.swg@lists.ogc.org> for best visibility. Thanks.

I’d welcome the opportunity to present recent WebVMT progress and future plans to help ensure that the Group is kept up to date. Please let me know when the next SDW Plenary meeting is scheduled, and I look forward to hearing from you soon.

Rob Smith

Away Team
www.awayteam.co.uk <http://www.awayteam.co.uk/>

[1] https://docs.ogc.org/is/21-056r11/21-056r11.html
[2] https://github.com/w3c/sdw/issues/1445#issuecomment-2626827076
[3] https://www.w3.org/TR/webvmt/
[4] https://github.com/WICG/datacue
[5] https://webvmt.org/demos/testbed#testbed-19
[6] https://github.com/HillyfieldsBubble/Releases/

> On 24 Apr 2025, at 8:02 am, Rob Atkinson <ratkinson@ogc.org> wrote:
> 
> Hi Rob
> 
> Note we have "wrapped" GeoPose schemas here
> 
> https://opengeospatial.github.io/bblocks/register/bblock/ogc.geo.geopose.basic.quaternion
> https://opengeospatial.github.io/bblocks/register/bblock/ogc.geo.geopose.advanced
> https://opengeospatial.github.io/bblocks/register/bblock/ogc.geo.geopose.basic.ypr
> 
> And mapped them to a notional (but not yet extant "geopose ontology" - or URIs)
> 
> When considering "alignments" it would be of interest to have this done via such an ontology - and the ontology and alignments published by the GeoPose SWG via the SDW.  
> 
> (sorry for my ignorance or forgetfulness - is WebVMT currently a work item under an existing OGC SWG? )
> 
> Rob Atkinson
> Senior Research Engineer  | Open Geospatial Consortium (OGC)
> Mobile: +61 419 202973
> ratkinson@ogc.org <mailto:ratkinson@ogc.org> | ogc.org <http://ogc.org/> | @opengeospatial
> 
> 
> 
> 
> From: Rob Smith <rob.smith@awayteam.co.uk <mailto:rob.smith@awayteam.co.uk>>
> Sent: Thursday, April 10, 2025 3:45 AM
> To: public-sdw-wg@w3.org <mailto:public-sdw-wg@w3.org> <public-sdw-wg@w3.org <mailto:public-sdw-wg@w3.org>>
> Subject: [webvmt] Status Update
>  
> 1. Progress Made
>      i. Continued development of prototype polyfill for WICG DataCue API [1] to support synchronisation of video with timed metadata in web browsers.
>     ii. Proposed change to expose HTML TextTrackCue constructor at MEIG meeting [2] on 4 March 2025.
>     iii. Discussed details of proposed change to expose HTML TextTrackCue constructor at WICG DataCue meetings on 11 March 2025 [3] and 20 March 2025 [4].
>     iv. Published explainer for proposed change to expose HTML TextTrackCue constructor [5] that enables custom cues for timed metadata in Javascript, including WICG DataCue API [1].
>     v. Chaired session on Synchronising Sensors With Geotagged Video [6] at W3C Breakouts Day on 26 March 2025 to identify missing web requirements for geotagged video use cases with sensors from community feedback.
>     vi. Updated Javascript playback engine on WebVMT.org <http://webvmt.org/> website [7] with prototype features developed in OGC Testbeds including negative cue times, simplified interpolation and heading.
>     vii. Continued participation in OGC Testbed-20 GIMI [8] to ensure that proposed design for GIMI video timed metadata is aligned with existing formats.
> 
> 2. Next Steps
>     i. Create short video summary of OGC Testbed-20 GIMI maritime and aerial use case results for OGC YouTube channel [9].
>     ii. Continue participation in OGC Testbed-20 GIMI [8] to ensure that proposed design for GIMI video timed metadata is aligned with existing formats.
>     iii. Continue alignment discussions with OGC GeoPose SWG [10].
>     iv. Continue community outreach and identify more activities to promote progress towards the standardisation track.
> 
> [1] https://wicg.github.io/datacue/#datacue-interface
> [2] https://www.w3.org/2025/03/04-me-minutes.html#56c2
> [3] https://www.w3.org/2025/03/11-me-minutes.html
> [4] https://www.w3.org/2025/03/20-me-minutes.html
> [5] https://github.com/WICG/datacue/blob/main/text-track-cue-constructor.md
> [6] https://www.w3.org/2025/03/breakouts-day-2025/#b-89d32797-5c4d-4bab-a9c0-0eca1ed1a114
> [7] https://webvmt.org/demos
> [8] https://portal.ogc.org/files/108074#GIMI
> [9] https://www.youtube.com/user/ogcvideo
> [10] https://www.ogc.org/projects/groups/geoposeswg