[georss] raster images and relationshiptag

[Jeroen Ticheler]

Hi,
Not sure if I understand this, its Friday 5:30PM so my brain is  
shutting down for the weekend ;-)

Anyway, I just wanted to say I think Mike's idea is interesting. I  
see 1 problem and that is that in my GeoRSS the RSS contains an image  
that is just a thumbnail. I would be very interested in seeing the  
footprints of the related metadata be correctly displayed with a  
simple (non-filled) box and than see the thumbnail when selecting a  
BBOX. At the same time I could see another URL in the feed doing just  
what Mike mentioned (even a simple GetMap request URL could be part  
of the RSS and function as an image as mentioned by Mike :-) )

Ciao,
Jeroen

On May 19, 2006, at 4:15 PM, Josh at oklieb wrote:

> Thinking about this, I can see cases for two alternatives:
>
> 1) Allow / suggest optional rss:enclosure or atom:link element(s)  
> inside of georss:where so that the link to be associated with the  
> location is clear. This could also be used to reference a web map  
> context document or the map view most useful for interpreting the  
> located content of the item / entry. This makes sense where the  
> handler for the linked resource has to be geo-aware anyway. The  
> atom:link element is more useful here since it includes "rel"  
> attribute which can identify what the resource represents. It does  
> have the complication of requiring rss and atom schemas to be  
> referenced from georss (complicated in that normative XML Schema  
> for these does not exist).
>
> 2) Allow / suggest georss:where or more likely georss:point /  
> georss:box as content for  rss:enclosure or atom:link elements.  
> This would more clearly provide an optional location for existing  
> media references, easier for a non-geo feed processor to deal with.  
> This does require a somewhat "non-standard" extension to rss or  
> atom, since content for the enclosure or ink elements is undefined  
> and extension points are only defined in atom for the feed, entry,  
> and person elements.
>
> These are probably not exclusive alternatives, but are valuable for  
> different situations.
>
> -Josh
>
> On May 19, 2006, at 9:04 AM, Josh at oklieb wrote:
>
>> Interesting idea. Could you provide an example of a feed using  
>> this? People are clearly using RSS to reference a variety of media  
>> resources (e.g. podcasts) and it would be important to support  
>> interoperable ways of clearly associating a location to the  
>> referenced resource so that a client can throw them on a map with  
>> both an interpretable style and the right links.
>>
>> BTW, the tag in the georss schema is named "relationshipTag"...
>>
>> Cheers,
>>
>> Josh Lieberman
>>
>> On May 19, 2006, at 6:26 AM, Mikel Maron wrote:
>>
>>>
>>> Anselm Hook and I were talking here at XTech about rasters in  
>>> GeoRSS, and came up with a use for the "relationshiptype" tag, to  
>>> specify that a box geometry designates the bounding box of an  
>>> image refernced in a RSS item. For example..
>>>
>>> <entry>
>>>   <title>Georeferenced Image</title>
>>>   <id>#1234</id>
>>>
>>>   <georss:where relationshiptype="image-extent">
>>>     <gml:Envelope>
>>>        <gml:lowerCorner>42.943 -71-32</gml:lowerCorner>
>>>        <gml:upperCorner>43.039 -69.856</gml:upperCorner>
>>>     </gml:Envelope>
>>>   </georss:where>
>>>  </entry>
>>>
>>> This seems like it could be pretty useful, but not something I've  
>>> thought of before. For example, many people were sharing aerial  
>>> images of New Orleans post-hurricane in KML. Imagine being able  
>>> to subscribe to a feed in a disaster zone, containing polygons  
>>> and points of affected areas, locations of aid delivery points,  
>>> and up to date imagery.
>>>
>>> Thoughts?
>>>
>>> -Mikel
>>>
>>>
>>>
>>>
>>>
>>>
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>>
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