Hey, yeah...it can be hard to see..especially if you're on a dark map.
The best thing to do is stand wherever you want, then point towards the sky or another bright object. Make sure you don't have a rifle selected; this is right in the way. Change to sidearm/medpack.
Here's an example of one I took yesterday:
It's a lot easier to see the position here in the bottom right. Just remember showstats gets REAL specific, down to a 6th decimal place.
So, the coords for my location in that screen would be: 944.717102/37.513317/250.418762
I usually go to the third decimal place at the max though...works a-ok for me.