Project Apollo used film cameras. Digital cameras where not invented until 1975.
This link: http://apollo.sese.asu.edu/ABOUT_SCANS/index.html
will show you how the actual, physical camera film is stored and handled.
And here area couple of the archives of the images from those films:
http://wms.lroc.asu.edu/apollo/browse
http://tothemoon.ser.asu.edu/gallery/apollo/
GPS:
Here is the wiki link on how GPS works. Basically, if the Earth was not a sphere it wouldn’t.
https://en.wikipedia.org/wiki/Global_Positioning_System#Space_segment
So stuff your flat-f*ckin Earth bullsh*t