RE: Agenda for BP sub-group call; 23-March @ 15:00UTC

Jeremy,

Regrets for the meeting (honestly – about to disappear for school pick up...)

But here are some notes I’ve made for the narrative:


Before the event, and as an ongoing task, professional data publishers – particularly those in the public sector - make datasets available on the Web so they are available for anyone to use at any time. This will include relatively static coverage datasets such as digital terrain models (DTMs), flood risk maps [ex1]; time series coverage maps of precipitation and surface air pressure;  vector datasets giving the location of dikes and dams, rivers, buildings, roads, water/land boundaries; and time series sensor data of water levels from tide, river and groundwater gauges [ex3].

Coverage datasets such as DTMs are usually large so are often made available as tiled subsets or in varying resolutions [BP27, ex2].



The published location of sensors in the field may be deliberately obscured for security reasons, for example by providing the 1km grid square that a field sensor is located within rather than an exact location.[BP 8]



Before, during and after the event, professionals may obtain 3D Building Information Models (BIMs) from the Web to model and predict flood water movement and drainage in an urban environment.



During the event, professionals may make use of high resolution DTMs to find the elevation of features currently only located by two horizontal coordinates. This may be used to identify critical facilities at risk (water treatment works, electricity substations), transport disruptions (impassable sections of roads or railways) and suitable places of refuge and provision of support (pubs, schools and community buildings). In this use case it will be important to know the positional uncertainty of the data being compared as tens of metres error in the horizontal direction can correspond to a significant difference in the interpolated elevation and therefore at risk from flood water. These professionals would use the dataset metadata [BP26] to locate the version of the dataset with the highest precision and accuracy [BP10] and to determine the correct CRS of those datasets [BP8].



After the event, reporters might compile and publish a descriptive account on the Web, linking to selected Web resources such as eye witness reports, social media photos, satellite imagery, flooding statistics. Where necessary they may improve the metadata and location information, for example by converting unstructured text of relative positions such as "riverA overtopped banks between bridgeC and bridgeD" into formal semantics using feature identifier URIs for the river and bridges and a published URI for the relative position relationship [BP9]. The event itself will also be given a URI.
An example from Wikipedia https://en.wikipedia.org/wiki/2007_United_Kingdom_floods


After the event...Insurance companies using data for risk exposure, government for policy making, researchers..??



[ex1]http://watermaps.environment-agency.gov.uk/wiyby/wiyby.aspx?topic=floodmap#x=462318&y=190515&scale=7

[ex2] http://www.europeandataportal.eu/data/en/dataset/8590d4a1-5ffe-49c0-91e9-0da44bf72de701


[ex3] http://www.shoothill.com/environment-agency-liveapi/


Rachel

From: Jeremy Tandy [mailto:jeremy.tandy@gmail.com]
Sent: 21 March 2016 10:32
To: SDW WG Public List
Subject: Agenda for BP sub-group call; 23-March @ 15:00UTC

Hi.

See the meeting page @ https://www.w3.org/2015/spatial/wiki/Meetings:BP-Telecon20160323


Just one topic for us to discuss:
·         For each of the actors, work through the flooding scenario (see BP Narrative<https://www.w3.org/2015/spatial/wiki/BP_Narrative>) to determine how they interact with spatial information - as a publisher or consumer - in order to flesh out the scenario further and [begin to] define the examples we will need

For those who took actions during the last call to work up their perspectives on the Actors ... please come prepared to share.

See you on Wednesday.

Jeremy
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