I think that denotes him as a medic. Seem appropriate, given that circumstances.
One of those is a pic of a LCD monitor while his pockets were still full of mags. The other is a blowup of a tiny part of a JPEG image, which attenuates the high-frequency information for the sake of compression. And they were taken in different lighting.
Yup
This is aerial imagery (airplanes), not satellite imagery. It's expensive to do and is not updated frequently.