As has already been mentioned, this totally depends on what you want to 
do with it. In our digital repository we have a policy of storing points 
(and polygons) as WKT. It's a well documented standard format that is 
supported by most GIS libraries. Since we're not doing any GIS queries 
directly from the repository it works fine.

For our applications that require polygon comparisons, the data gets 
stored natively as polygons in PostGIS. For mapping applications that 
are built around points, using Solr's built in LatLon type can be a 
great option. For our geobrowse application 
(http://www.lib.unc.edu/dc/geobrowse/) our points are just stored in 
Solr as separate float fields, because all we're doing is plotting them 
on a map.

I guess for us, we've found that multiple formats work best.

Mike

On 06/28/2012 02:57 PM, Mark Jordan wrote:
> code4libers:
>
> What's the best (i.e., most standardized and flexible) format for storing single-point geocoordinates? Pages like http://www.maptools.com/UsingLatLon/Formats.html offer too many choices.
>
> TIA,
>
> Mark
>