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RE: ISSUE-19 (point-encoding): How should we represent points? [Core FPWD]

From: Seiler, Karl <karl.seiler@navteq.com>
Date: Wed, 15 Jun 2011 08:28:48 -0500
To: Jens de Smit <jens@layar.com>, "public-poiwg@w3.org" <public-poiwg@w3.org>
Message-ID: <133ACBBC61BE0E4081B6E35E542ECE2301205DFA@hq-ex-mb03.ad.navteq.com>
In the POI publication business we see high demand for all city center POIs to come associated with a building footprint polygon. So a link list of long/short form points seems good to me for representing footprints, with additional long/short points for center point and for entrances/doorways (aka nav-points).

_______________________________
Karl Seiler
Director Location Technology & Services
NAVTEQ - Chicago
(T)  +312-894-7231
(M) +312-375-5932
www.navteq.com

-----Original Message-----
From: public-poiwg-request@w3.org [mailto:public-poiwg-request@w3.org] On Behalf Of Jens de Smit
Sent: Wednesday, June 15, 2011 4:03 AM
To: public-poiwg@w3.org
Subject: Re: ISSUE-19 (point-encoding): How should we represent points? [Core FPWD]

On Fri, Jun 10, 2011 at 5:26 PM, Raj Singh <rsingh@opengeospatial.org> wrote:
> Jens, I think you probably mean to support both point formats, and only use the GeoRSS GML format (more brevity) for lines and polygons? I can live with that.

I didn't mean that specifically. Schema-wise, I'd say a point could be
a long form <point><latitiude/><longitude/></altitude></point>
element, or a short form <point>1.0 2.0 3.0</point>. A line or polygon
could then consist of either a series of long form <point> elements or
short form points. It would make the spec more complete/consistent and
not make parsers that much more complex. In practice, I would suggest
anyone use the short form for anything bigger than a triangle, unless
they have a very specific case to use the long form (in which case it
is useful that the spec supports long form too).

Jens



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Received on Wednesday, 15 June 2011 13:29:19 UTC

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