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Web Video Map Tracks (WebVMT) Community Group

This group aims to encourage uptake of Web Video Map Tracks (WebVMT) to help establish an online ecosystem of users and developers by providing a forum in which to:

  • identify & refine use cases;
  • ensure that the design is fit for purpose;
  • resolve implementation issues;
  • develop supporting documentation & tools;
  • progress towards standardisation.

Participation is welcomed by anyone providing constructive input regarding these topics within the scope of 'synchronising geolocation with video for the web', and by those with relevant expertise in particular.

See also:

Note: Community Groups are proposed and run by the community. Although W3C hosts these conversations, the groups do not necessarily represent the views of the W3C Membership or staff.

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Classifying Video Training Data For Machine Learning Using WebVMT

A machine learning algorithm needs to be trained to recognise cats and dogs from video footage. The learning process can be accelerated if the training footage is manually tagged to classify timed sections of video when cats and dogs appear, which can be done in a common metadata format with the proposed data sync feature in WebVMT using the following excerpt:

NOTE Cat, top left, after 5 secs for 20 secs

00:00:05.000 —> 00:00:25.000
{“sync”: {“type”: “org.ogc.geoai.catdog”, “data”:
{“animal”:”cat”, “frame-zone”:”top-left"}}}

NOTE Dog, mid right, after 10 secs for 30 secs

00:00:10.000 —> 00:00:40.000
{“sync”: {“type”: “org.ogc.geoai.catdog”, “data”:
{“animal”:”dog”, “frame-zone”:”middle-right"}}}

This approach is applicable to any project using video as input to a machine learning algorithm, regardless of the video encoding format, e.g. MPEG, WebM, OGG, etc. and without modifying the video files themselves.

In addition, video metadata can be exposed in a web browser using the proposed DataCue API in HTML.

Call for Participation in Web Video Map Tracks (WebVMT) Community Group

The Web Video Map Tracks (WebVMT) Community Group has been launched:


This group aims to encourage uptake of Web Video Map Tracks (WebVMT) to help establish an online ecosystem of users and developers by providing a forum in which to:

  • identify & refine use cases;
  • ensure that the design is fit for purpose;
  • resolve implementation issues;
  • develop supporting documentation & tools;
  • progress towards standardisation.

Participation is welcomed by anyone providing constructive input regarding these topics within the scope of ‘synchronising geolocation with video for the web’, and by those with relevant expertise in particular.

See also:


In order to join the group, you will need a W3C account. Please note, however, that W3C Membership is not required to join a Community Group.

This is a community initiative. This group was originally proposed on 2018-10-15 by Rob Smith. The following people supported its creation: Rob Smith, Peter Rushforth, François Daoust, Linda van den Brink, Joseph Pollack, Carine Bournez. W3C’s hosting of this group does not imply endorsement of the activities.

The group must now choose a chair. Read more about how to get started in a new group and good practice for running a group.

We invite you to share news of this new group in social media and other channels.

If you believe that there is an issue with this group that requires the attention of the W3C staff, please email us at site-comments@w3.org

Thank you,
W3C Community Development Team