newbie: resultset as xml, HOW?

Hey

I'm using PHP 5.2.0 and MySql 5 to create a web site. Now I'm trying
implement ajax (google map).. In the database I've got the longitude &
lattitude of positions on the map... I want these positions sent (as xml)
from the database so they can be displayed as markers on the map....

so my questions is:
How can I convert the select below so that the resultset is xml?
select longitude, lattitude from location where id = 1;

(I ask because I've got some experience with MS Sql Server, which have the
XML option to the select.... in MS Sql Server I think this could have solved
it (maybe syntax is wrong): select longitude, lattitude from location where
id = 1 for XML.... but I don't know if this can be done in mysql...; )

Any suggestions?

Jeff