How to mark up a location of a product using schema.org ?

​Hello to all of you,

My name is Tomasz and I'm working for ecommerce software vendor adjusted to
SME's.

>From some time I'm wondering​ how to mark a product location with usage of
schema.org that search engine will be able to recognize products which are
nearby ?
That (maybe) will give a chance to SME's to over come big player in search
results as more & more searches are done on mobile which is strongly
related to location.
Just an idea to evaluate...can some one help me with this ?

Regards,
Tomek