See https://en.wikipedia.org/wiki/Maidenhead_Locator_System
#EN82 is roughly southeastern Michigan and #EN82dg is roughly downtown Ann Arbor. You can add more letters for more precision. System is used by ham radio for the last 40+ years.
nice #garden hack to tag with your grow zone. looks like I'm in #zone6a as well.
I've done similar with #hamradio tweets to tag my "grid square", which is #EN82 or #EN82dg . More geographical, less climatological, but basically the same idea.
I wonder how much grow zones will mutate due to climate changes, and practically also due to technical innovations like hoop houses and cold frames.
I'm a ham radio operator (W8EMV) located near #KARB , grid #EN82dg . My general purpose ham radio stuff is at @w8emv .
I run an #ADSB tracker feeding @ADSBexchange and another service, using a Pi 3 as the host. My #1090MHz antenna is not very good, and I hope to be able to get better coverage with some antenna work.
Favorite craft to track is #N3A #A31AA0 "Wingfoot Three", particularly when it's over Michigan Stadium for a Wolverines game.
Blog:
Ed W8EMV
Ed W8EMV 
Ed W8EMV :airplane: