Spatial Data on the Web IG - Plenary Call

Approving past minutes

<brinkwoman> https://‌lists.w3.org/‌Archives/‌Public/‌public-sdwig/‌2018Jan/‌0002.html

<brinkwoman> +1

<MichaelGordon> +1

<tidoust> +1

<ChrisLittle> +0 minutes, not present

<billroberts> +1

Minutes approved

Status update of subgroups (Stats, BP)

Linda: On top of updates, Will you have a telco before the next F2F?

MichaelGordon: In the last meeting, we started to look at activities we could have to encourage adoption of the best practices.
… I took on the task of restructuring the pages on GitHub into domain specific areas where we might want to have an impact.
… [Michael going through a long tunnel without audio connection]

billroberts: Switching to stats while Michael sorts out his audio issues, we had a call 2 weeks ago where we discussed our use case document, and reviewed the document Andrea had prepared
… Some discussion about other groups that are doing things on statistics data
… The special angle that we're doing is on the Web part, but we need to pay attention to what others are doing as well.
… Quite a bit of work, but we need to make sure that we have an exhaustive enough list.
… There won't be another call before the F2F, but we'd like to spend some time at the F2F about that.

MichaelGordon: [switched phone]. Back to the SDW Best Practices. Publishing area domain might be interesting. To be discussed how people can take on some of these domains. How we could work with Denise at OGC to craft some messaging with a domain flavour.
… We'd like some consistent theme but with some specifics.
… Good piece of work to tackle at the F2F.
… There is not a plan for another telecon before the F2F.

Linda: Thanks. No news on Moving Objects. I saw some activity related to SSN on GitHub

Francois: Some errata were found by an external reviewer, which led Maxime to find additional errata. To be discussed and approved by the group.

ChrisLittle: Some activity from Simon. Need to review it and make sure I get what he proposes.

Video Geotagging Protocol For Electronic Maps

See Video Geotagging For Electronic Maps slides

Rob_Smith: From Away Team. I've been developing an idea for video geotagging. Starts from work with Ordnance Survey last year where they wanted to track position in a show.
… The thing I discovered is that there does not appear to exist any standard for that currently.
… Different vendors take different approaches, including embedding geolocation at the frame or metadata level.
… It's not very accessible. Also expensive to get an add-on (only for high-end equipment) to have a GPS with your camera.
… Now, there is an emerging market in "mobile video devices"
… How can that need be addressed and what are the issues?
… There are many ways to record geolocation. How to associate it with video is more problematic.
… WebVTT support provides a hint to a possible solution. It's text-based, easy to author, accessible.
… The file can be distributed with the video.
… You could present geolocation data on Google Maps for instance. Camera track on a map.
… Further value can be added by framing the map. You could annotate it to draw the user's attention to a particular feature.
… I cornered it down to zooming, panning, and a few additional features
… This provides cross-platform support instantaneously, and you don't need expensive equipment. A smartphone is enough for capture, and a web browser display is enough for rendering
… Looking at use cases:
… Coastguard/Mountain Rescue: you've got a drone searching for someone in a difficult to reach area. The remote operator can see the video, see the location on a map, and can zoom out to identify the right approach route to the person.
… Area Survey: Drone with a detector surveying of a given area. The operator can check its work. You can fill in the area. You have improved quality insurance. No need to go to the office to analyze the footage.
… Sports Trails: user with a helmet camera, traveling however they want. They can concentrate on their activity.
… Speed and distance calculation can be tricky, but with this, it would already be built-in.
… TV Coverage: the most complex one. Cameras on drones and competitors. Example of a car rally. You have multiple media devices. The director can see all of them on a map, and it can redeploy them live. It becomes an asset management system.
… This concludes my presentation.

ChrisLittle: Thank for acknowledging SMIL/SVG on the mailing-list. Have you thought about contacting Christine Perey who is involved on Augmented Reality scenarios.
… It may be an area to interface to, even if it does not change your idea.
… The other connection is inside OGC is the Drone working group that just started. Their first deliverable is mission planning.
… It may be your use case would be useful for them.
… You may get some volunteers to help you.

Linda: Of course, in this group, we have a subgroup that will be looking at moving objects, so I see somewhat of an overlap there. They have not been active yet, though.

Rob_Smith: Just to give you a little bit of information as to where I am, I worked on a tech demo that proves things work in the browser.
… I've worked on spatial in the past, also development for EA and Nokia.

Linda: The text format that you are using to store the data, is that something like GPX?

Rob_Smith: It's a hybrid. The tech demo uses the WebVTT block structure, with a little bit of formatting at the start. It has cue times.
… I copied that structure. I replaced the text that they used with a new markup language.
… Thanks to Chris for the SMIL reference, I re-shaped the animation syntax to be more SMIL-like.
… I'm looking to keeping it as lightweight as possible.

ChrisLittle: You may want to steal more ideas from an OGC standard to embed positions in text messages, which is of course not very long.

Rob_Smith: Sounds like a good suggestion. Can you send me a reference?

ChrisLittle: Will do.

Francois: Media people tend to like to embed tracks within media containers. To keep in mind. Also, what usually helps in standardization groups is to sketch some sort of draft spec to drive discussions. Are you planning to do that?

Rob_Smith: Yes, I started to draft something for my own sanity.

<ChrisLittle> GeoSMS OGC standard for Rob Smith http://‌www.opengeospatial.org/‌standards/‌opengeosms

F2F meeting

Linda: A few things. First, please register or fill the form to say that you are not coming. It's important for us to have this information to finalize the meeting details.