- From: John Goodwin <John.Goodwin@ordnancesurvey.co.uk>
- Date: Mon, 27 Jan 2014 09:12:01 +0000
- To: Raphaël Troncy <raphael.troncy@eurecom.fr>, "Andrea Perego" <andrea.perego@jrc.ec.europa.eu>, Frans Knibbe | Geodan <frans.knibbe@geodan.nl>
- CC: Sven Schade <sven.schade@jrc.ec.europa.eu>, "LocAdd W3C CG Public Mailing list" <public-locadd@w3.org>
Hi, > * Your 'locn:representativePoint' predicate would be the equivalent of > the 'ex:aCentroid' of Frans? Similar - centroid has a more specific meaning, and there are a number of 'centroids' (e.g. centre of gravity). By 'representative point' I simple mean a point guaranteed to lie within the region in question. > * I'm not sure I understand the difference between your proposed > 'locn:extent' predicate and the existing 'locn:geometry' predicate, > except the later is loosely defined. Is the same thing? A could of things. Simon C points out that extent (in some ISO standard) is actually an MBR so I might need to pick a new predicate here. The different for me was the locn:extent was a specific kind of geometry representing the footprint of the geographic thing in question. Often a polygon, potentially a multipolygon/multisurface [1]. We could also potential link the geographic thing to a 'boundary' where the boundary is a line string. This would be another type of geometry. > * What about the MBR? Is just another 'extent' (polygon) or should it > have a specific type because we want to say something about it? Will have to check my standards... John [1] - possibly being too loose with my terminology at the moment, but it is Monday morning :) This email is only intended for the person to whom it is addressed and may contain confidential information. If you have received this email in error, please notify the sender and delete this email which must not be copied, distributed or disclosed to any other person. Unless stated otherwise, the contents of this email are personal to the writer and do not represent the official view of Ordnance Survey. Nor can any contract be formed on Ordnance Survey's behalf via email. We reserve the right to monitor emails and attachments without prior notice. Thank you for your cooperation. Ordnance Survey Adanac Drive Southampton SO16 0AS Tel: 08456 050505 http://www.ordnancesurvey.co.uk
Received on Monday, 27 January 2014 09:12:29 UTC