[OSGeo-Standards] Proposal for Open Search Geo extension support of point and line

[Douglas J Newman]

The NASA ECHO project (www.echo.nasa.gov) is in the process of
providing a search capability, via an ESIP interface (using the Open
Search standard with Geo extension), by point and line.

The current implementation can be seen at 
https://api.echo.nasa.gov/echo-esip/

The http://www.georss.org/simple specification (which I believe the
geo
extension is based on) provides this support and we would like to
propose
it's addition to the open search geo spec.

For example,

Example URL templates:

http://example.com/?q={searchTerms}&pw={startPage?}&line={geo:line?}&format=rss


http://example.com/?q={searchTerms}&pw={startPage?}&point={geo:point?}&format=rss


Example requests:

http://example.com/?q=pizza&line=-111.032,42.943,-119.856,43.039&format=rss


http://example.com/?q=pizza&point=-111.032,42.943,-&format=rss

I note that the section of the Geo extension on atom responses has the
element,

<georss:line>40.73763 -73.9972 40.73519 -73.99167 40.737015 -73.99035
40.73643 -73.98914 40.734640 -73.990431 40.731617 -73.991504</
georss:line>

we propose an additional element for point,

<georss:point>40.73763 -73.9972</georss:point>

Please let us know if this is proposal is acceptable.
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