What would be the best way to send one's location to the NZ emergency services from a smartphone?

Google found this: http://www.stuff.co.nz/technology/apps/69496949/smartphone-app-to-transmit-111-callers-location

But it doesn't look like it's come to fruition yet.

Is there another way?

Come to that, what's a quick way of sending ones location to anyone anytime? i.e not necessarily in an emergency, ideally by SMS, or without you both having to have some special app.