Two things: You can pipe the GPS right into the serial port on the raspberry pi, making the whole thing smaller.<p>Your GPS is an accurate time source, and assuming it has a backup battery, or at least the sight of one satellite it can spit out a timestamp that you can feed into NTP:<p><a href="http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html" rel="nofollow">http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html</a>
<i>An interesting thing I learnt about GPS hacking was that it’s either 100% absolutely accurate or throws you somewhere in the middle of Morocco.</i><p>Imagine trying to debug this if you lived in the middle of Morocco.
Any ideas on what kind of powerbank / battery to couple a RPi with for some outdoor action? A friend at work did some tests with his powerbank and his Pi2 was burning through it pretty quickly, and I don't suppose Pi3 will be any better.<p>Also, I <i>love</i> the sewing electronics into the backpack part :).
I am saddened that we live in a time where people surreptitiously photograph others in public without any thought to ethics. I know it's legal and people should have no expectation of privacy in public but it's tragic to see this gradual erosion of common-courtesy privacy.
Did something similar to this with a raspberry pi, a pair of 70's ray ban bullet hole shooter glasses and a spy cam a few years back. Just got a cam that let me ditch the pi, slim it down to a Google glass type size, and stream the video to a smartphone
The new Zero and upgraded camera could be very useful for this: <a href="https://www.raspberrypi.org/blog/zero-grows-camera-connector" rel="nofollow">https://www.raspberrypi.org/blog/zero-grows-camera-connector</a>