[georss] [OpenLayers-Users] GeoRSS and layers

[Yves Jacolin]

Hi,

I am the user who sent the question to the OL list. I did not manage geoRSS 
and all other things link to this. ;-)

What I would like to do first, was just trying to manage icon using GeoRSS. 
But, I used only point feature so a picture file could be great (but only for 
my own purpose). For a more general dev, It would be great to manage for all 
other feature type. So my first attempt is closer to the solution gave by 
Christopher Schmidt. But I did not know if I could add some custom tags. The 
answer is not, but it seems we could use another space name (am I right about 
the term ?) inside GeoRSS XML file.

SVG seems quiet difficult, not really handy. But it will surely nicer and 
smaller than a picture file ;-)

Thanks you for your answer !

Y.
Le Lundi 15 Janvier 2007 21:51, Mikel Maron a écrit :
> Your first email included quotes from an OpenLayers user looking to specify
> an icon within a GeoRSS feed, and that's exactly what I've addressed, never
> suggesting that MediaRSS was appropriate for anything beyond that. So yes,
> you are confused.
>
> For an extensible styling solution, I'd prefer to start from SVG.
>
>
>
> ----- Original Message ----
> From: Christopher Schmidt <crschmidt at metacarta.com>
> To: Mikel Maron <mikel_maron at yahoo.com>
> Cc: georss at lists.eogeo.org; Yves Jacolin <yjacolin at free.fr>
> Sent: Monday, January 15, 2007 8:34:32 PM
> Subject: Re: [georss] [OpenLayers-Users] GeoRSS and layers
>
> On Mon, Jan 15, 2007 at 08:37:50AM -0800, Mikel Maron wrote:
> > For icons, worldKit uses the MediaRSS namespace.
> > http://search.yahoo.com/mrss This is the defacto media syndication
> > format, and is used by flickr, among others. For mapping icons, worldkit
> > uses media:thumbnail.
> >
> > http://worldkit.org/doc/rss.php#thumb
>
> Perhaps I'm confused, but there are a lot more things to think about
> than a thumbnail icon. Describing representation of geographic
> information requires describing things like stroke (color, width,
> outline), etc. This is what SLD is designed for, and part of what KML
> contains. KML contains additional pieces to also describe the
> geographic features, a role which GeoRSS performs on its own, but the
> styling/symbolization of geographic features is not something that seems
> to fit inside the Yahoo! Media RSS namespace.
>
> Essentially, so far as I can see it, there are two useful options:
>  * Define a subset of SLD, and use that to describe rendering
>    information.
>  * Define a subset of KML style descriptors, and use that to describe
>    rendering information.
>
> The use of media:thumbnail is fine for single points, but GeoRSS has
> support for more than that, and ignoring the other geometry types over
> a points-only approach seems like a mistake.
>
> A simple chunk of KML to describe an Icon Style is:
>
> <Style id="rel1.0">
> <IconStyle>
>   <Icon>
>     <href>http://developers.metacarta.com/img/symbols/mc1.0.png</href>
>   </Icon>
> </IconStyle>
> </Style>
>
> It would probably be possible to include something similar in a GeoRSS
> feed:
>
> <rss xmlns:kml="http://earth.google.com/kml/2.0"; xmlns:georss="foo">
> <item>
>   <georss:point></georss:point>
>   <kml:Icon>
>     <kml:href>foo</kml:href>
>   </kml:Icon>
> </item>
>
> At the same time, more complex Styling information can also be included,
> when needed, preventing the need for a non-extensible ad-hoc solution.
>
> I don't have enough use cases for GeoRSS that I have a desire to
> champion a particular decision here, but I strongly encourage anyone
> thinking about this to consider existing standards for geographic data
> styling in the discussions.
>
> Regards,

-- 
Yves Jacolin
-------------
http://yjacolin.gloobe.org
http://softlibre.gloobe.org