How to put the geographic location in the html code

Some tag for 44:52:52N 12:30:20E

[jetteroheller]

I find no HTML META tag to inform a search engine about the exact geographic location of an item,
I describe on a web page.

This could make it possible to

enter own location (maybe automatic by GPS)
search term (for example camping place)
sort by distance

So I would get a list of web pages with "camping places" sorted by the distance to my own location.

My car hat GPS, so I can notice the location.
Also Google world is very usefull to search a place and take the position.