- From: Phil Archer <phila@w3.org>
- Date: Wed, 18 May 2016 16:12:20 +0100
- To: SDW WG Public List <public-sdw-wg@w3.org>
The minutes of today's BP sub group are at
https://www.w3.org/2016/05/18-sdwbp-minutes
Lots of regrets for today's meeting but we were able to talk about how
Linda was able to make progress with her section of the narrative and
hear about Bart/Nicky's related project that might give us a good
example in due course.
Spatial Data on the Web WG BP Sub Group
18 May 2016
[2]Agenda
[2] https://www.w3.org/2015/spatial/wiki/Meetings:BP-Telecon20160518
See also: [3]IRC log
[3] http://www.w3.org/2016/05/18-sdwbp-irc
Attendees
Present
phila, BartvanLeeuwen, ByronCinNZ, ClausStadler, Linda,
Nicky, AndreaPerego
Regrets
Jeremy, Payam, Scott, Clemens, Josh, Kerry, Bill, Ed,
Matt
Chair
Linda
Scribe
phila
Contents
* [4]Topics
1. [5]Progress of BP Narrative
2. [6]Item 3 Publish flood inundation forecast data as
vector dataset and identify the administrative areas
(?) that each inundation area is predicted to impact
3. [7]Steps for completing the narratuve
* [8]Summary of Action Items
* [9]Summary of Resolutions
__________________________________________________________
<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
[10]https://www.w3.org/2016/05/04-sdwbp-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
[11]https://www.w3.org/2016/05/04-sdwbp-minutes
[11] https://www.w3.org/2016/05/04-sdwbp-minutes
<Linda> [12]https://www.w3.org/2015/spatial/wiki/Patent_Call
[12] https://www.w3.org/2015/spatial/wiki/Patent_Call
-> [13]https://www.w3.org/2015/spatial/wiki/Patent_Call Patent
Call
[13] https://www.w3.org/2015/spatial/wiki/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
-> [14]https://www.w3.org/2015/spatial/wiki/BP_Narrative_2
Narrative
[14] https://www.w3.org/2015/spatial/wiki/BP_Narrative_2
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
-> [15]https://www.w3.org/TR/2016/WD-vocab-dqv-20160519/ DQV
[15] https://www.w3.org/TR/2016/WD-vocab-dqv-20160519/
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
[16]https://www.w3.org/2015/spatial/wiki/Meetings:BP-Telecon201
60518#Main_agenda
[16]
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.
Summary of Action Items
Summary of Resolutions
1. [17]Accept last week's minutes
https://www.w3.org/2016/05/04-sdwbp-minutes
[End of minutes]
__________________________________________________________
Received on Wednesday, 18 May 2016 15:13:01 UTC