[georss] GeoRSS polygon/line elevation

[Ron Lake]

Why is it unfortunate?  When do you want this sort of thing? Contour
lines?  Building footprint? You achieve exactly the same thing and the
points in the line need not be all at the same elevation.  In GML you
could always add another property to the object in question (e.g.
abc:elevation) but then the geometry is implicitly specified.  This is
used in many cases.  Depends on what you want to do.  What is the
requirement?

R

-----Original Message-----
From: ajturner at gmail.com [mailto:ajturner at gmail.com] On Behalf Of Andrew
Turner
Sent: January 24, 2007 10:05 AM
To: Ron Lake
Cc: Mikel Maron; georss at lists.eogeo.org
Subject: Re: [georss] GeoRSS polygon/line elevation

That seems unfortunate.

What is the path for moving forward in the GeoRSS specification, esp
Simple? There have been several ideas and desires brought up on the
list:

 * Names/Regions/addressing
 * GeoRSS in HTML
 * Collections of points (in a single item)
 * Elevation for lines/polygons
 * others?

Andrew

On 1/24/07, Ron Lake <rlake at galdosinc.com> wrote:
> Hi,
>
> There is no way to say in GML that every point in this line segment
has
> some elevation without specifying such through each of the coordinates
> of the control points of the line segment.
>
> So your examples below in GML would be
>
>         <abc:Something gml:id="someID">
>                 <abc:position>
>                         <gml:Point>
>                                 <gml:pos>45.256 -110.45 313</gml:pos>
>                         </gml:Point>
>                 </abc:position>
>                 <abc:extent>
>                         <gml:Polygon>
>                                 <gml:posList>256 -110.45 313 46.46
> -109.48 313 43.84 -109.86 313 45.256 -110.45 313/>
>                         </gml:Polygon>
>                 </abc:extent>
>         </abc:Something>
>
>
> Cheers
>
> Ron
>
>
> <georss:polygon>
>     45.256 -110.45 46.46 -109.48 43.84 -109.86 45.256 -110.45
> </georss:polygon>
>
> -----Original Message-----
> From: georss-bounces at lists.eogeo.org
> [mailto:georss-bounces at lists.eogeo.org] On Behalf Of Mikel Maron
> Sent: January 24, 2007 8:21 AM
> To: Andrew Turner; georss at lists.eogeo.org
> Subject: Re: [georss] GeoRSS polygon/line elevation
>
> "elev", and the other properties, were changed to elements from
> attributes, for version 1.
>
>     <georss:point>45.256 -110.45</georss:point>
>     <georss:elev>313</georss:elev>
> But the document at http://georss.org/georss/1/ incorrectly shows them
> as attributes.
>
> ----- Original Message ----
> From: Andrew Turner <georss at highearthorbit.com>
> To: georss at lists.eogeo.org
> Sent: Wednesday, January 24, 2007 3:15:43 PM
> Subject: [georss] GeoRSS polygon/line elevation
>
> There doesn't appear to be any mechanism in v1 of GeoRSS spec to
> handle elevation in anything but a Point.
>
> <georss:point elev="313">45.256 -110.45</georss:point>
>
> but
> <georss:polygon>
>     45.256 -110.45 46.46 -109.48 43.84 -109.86 45.256 -110.45
> </georss:polygon>
>
> would be?
> <georss:polygon elev="313 310 306 313">
>
> nothing seems apparent in GML either - so I must just be missing it.
>
> Andrew
> --
> Andrew Turner
> ajturner at highearthorbit.com        42.4266N x 83.4931W
> http://highearthorbit.com              Northville, Michigan, USA
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-- 
Andrew Turner
ajturner at highearthorbit.com        42.4266N x 83.4931W
http://highearthorbit.com              Northville, Michigan, USA