Spatial Data on the Web WG BP Sub Group

<scribe> scribe: phila

<scribe> scribeNick: phila

<Linda> ByronCinNZ, Nicky, can you join the webex?

-> www.w3.org/TR/2016/WD-dwbp-20160519/ DWBP 'Last Call'

PROPOSED: Accept last week's minutes https://www.w3.org/2016/05/04-sdwbp-minutes

+1

<Linda> +1

<ClausStadler> +0 (unfortunately missed it because i confused the time)

<BartvanLeeuwen> +0 not there

RESOLUTION: Accept last week's minutes https://www.w3.org/2016/05/04-sdwbp-minutes

<Linda> https://www.w3.org/2015/spatial/wiki/Patent_Call

-> https://www.w3.org/2015/spatial/wiki/Patent_Call Patent Call

Progress of BP Narrative

Linda: Lots of regrets for this week
... AS I think we know, we're working on a narrative to use as the main structure of the doc. Narrative is about a flood event and the emergency response to it

-> https://www.w3.org/2015/spatial/wiki/BP_Narrative_2 Narrative

Linda: Jeremy divided the narrative into 9 sub items and assigned an owner to each section.
... First item is listed without an owner in the agenda but Jon Blower & co at Reading Uni are going to cover that for us.
... Have you had a chance to look at it, Bart?

BartvanLeeuwen: A quick remark - I wasn't on the call when this was mentioned before is about terminology.
... I have problem with the work inundentation

phila: (it just means flood)

Linda: It should be clear from the last minutes that we decided that we wanted to make it clearer. Avoid too specific terminology. It just hasn't been done yet.

BartvanLeeuwen: OK, I remember we had the discussion

phila: It's not an exact synonym, but it's probably OK

Linda: OK, let's say flood.

BartvanLeeuwen: Nicky is here to help take weight off my back but we're both in a project for the Dutch Fire Department and the Road and water authority
... Talking about exchanging data on flooding
... ALl the stuff that is in this narrative is what we talk about with them.
... As ever, a lot of discussion with them is so far mostly about process but that's always the case.
... We're hoping for more discussion about what is happening in the wild. We certainly mentioned this WG

Item 3 Publish flood inundation forecast data as vector dataset and identify the administrative areas (?) that each inundation area is predicted to impact

Linda: This is where a Web developer decides to use some data. He will convert a coverage to a feature dataset
... That sounds like a lot to ask of a Web developer
... and then publish this data as a set of features with persistent URIs etc.
... Identify the admin areas that touch the flooded areas.
... I decided to try and provide some content for this part of the narrative but I can't provide everything that Jeremy wrwote.
... I have the Geonovum testbed where interesting stuff has been going on.
... What I said was that those flooded areas are new features and the developer will need to mint their own IDs
... Next step is relate each flooded area to an admin area. He'll do this offline with a GIS tool.
... Not interesting here to talk about how that's done. But he creates links from the flooded areas to admin.
... I gavce a JSOn example of that.
... There are more parts of the task that Jeremy descibes that I don't have any content for.
... Need to think about data compactness and performance
... Again had some Geonovum test bed info I could use. Algorithms for reducing hte number of points in a geomoetry.
... Last thing to do is to include provenance data so we know which ervsion of the dataset was used.
... Dunno about that so I didn't provide that info for the narrative.
... I tell you this as an example of how you can provide content for one of those narrative items.
... It doesn't mean that an owner has to know everything. Just put in what you can and work with others to complete it. That's the part I have left to do.
... But I already have some examples in there.

phila: How long did it take?

Linda: About 2 hours
... if we get more content like this in the other narrative items then that's going to help.
... What we need most is examples... How you can do things like simplify geometries

BartvanLeeuwen: I see you;re using stuff from the testbed
... The project was obviously set up to get insights to see how things can be done, but is that a BP?
... This whole geonovum test bed tried various things to see how we could solve problems but there's no production environment around it.
... I'm not against that as I'm facing some of those problems myself, but on the plenary call I'd like to hear what people think.

phila: makes the case for *some* fiction, to support the real world intended outcomes

BartvanLeeuwen: There aren't any BPs yet, so we have no real world info to draw on.
... We'd find lots of ways of solving the problem.
... So in an example, we say that you need to have a URI for your features. Then show how you might do it, not how you must do it.

Linda: For the simplifying geometries, we would say that you shoujld provide simplified geometries and then we can offer one or more examples

phila: Sounds right to me

Linda: AndreaPerego your name is on item 4
... Anything to report?

AndreaPerego: I was thinking about how I can contribute. It's not clear to me which level of detail we should aim for.
... I said I'd take care of the metadata part. So I want to work out how I can apply this to the narrative.
... I'm not sure I can address all the relevant metadata issues just sticking to the narrative.

Linda: Can you give an example?

AndreaPerego: We have this data, we have to make it discoverable, so the related BPs about publishing metadata, but also about the format we want to use for the publications.
... Using schema.org, perhaps.
... There are some open issues on how to specify the precise geometry, bouncding box, CRS, spatial resolution etc.
... Is it fine if I can just address some of the BPs

Linda: I think that would be a good way to go. That's what I did. I couldn't provide complete content for item 3, so I filled in what I could.
... The next step is to add more, perhaps someone else can do that.

AndreaPerego: OK, I'll try and do my draft by next week.
... One thing that might be relevant to scope broadening, might be to share metadata via multiple platforms so that people from other communities can find it.
... Are we bound to the boundaries?

Linda: I think you're free to broaden it...
... I think if you publish the metadata so it's usable in different platform, that improves discovery
... SO you're touching on GeoDCAT I guess?

AndreaPerego: You have spatial metadata in ISO19115 but you want to make it available in RDF too.

Linda: And you mentioned the Data Quality Vocab to talk about spatial resolution

AndreaPerego: Is spatial resolution a use case for the DQV?

BartvanLeeuwen: What do you mean exactly?

AndreaPerego: The map has 1km or 1m resolution, 1:1000 and so on
... That's a differnet level of generalisation

BartvanLeeuwen: That's rlevant. If you;re looking at a flood map, it matters if it's at 50 m or 100m resolution

-> https://www.w3.org/TR/2016/WD-vocab-dqv-20160519/ DQV

phila: Talks about the DQV and hwo it should be possible to express spatial resolution using it.

AndreaPerego: I'll try and do my bit by next week's plenary call

Linda: I won't go into other areas as the owners aren't here today.

Steps for completing the narratuve

s.narrative/narrative/

Linda: Jeremy wants us to reference sources of data. That speaks to Bart's question about what needs to be real world
... Maybe we shouldn't be too strict about that.

phila: wonders where Linda is reading this from?

Linda: from the agenda https://www.w3.org/2015/spatial/wiki/Meetings:BP-Telecon20160518#Main_agenda

Completing the narrative

(i) reference source implementations "in the wild"

(ii) convert the implementation pattern to discuss the relevant aspect of the flooding scenario;

(iii) create a full worked example; publish to GitHub?

(iv) grab code snippets for the Best Practice document

Linda: from this list, I think the first item we havea discussed and we should bring it up in the full group.
... The other parts, esp 3 and 4 ... full worked examples might be simple for some and a hurdle for others.
... Not everyone can publish a full example

phila: Examples can be published on w3.org with the doc

BartvanLeeuwen: Asked about time line

phila: Suggested that an extension to July 2017 seems likely.

BartvanLeeuwen: Nicky nad I will have a product within that time
... The demo needs to be finished in September this year
... SO by summer next year that's well within time

Linda: That would be good. It also means that as a WG we don't need to create a full example

phila: Dips a toe into problem of seeming to support one solution

BartvanLeeuwen: It's a demo that will be oppen source etc. by the fire department

phila: Sounds good.