It's funny how we all know this type of technology exists, but we never stop and find out the backstory of why and how it came to be. Great article, but depres

It's funny how we all know this type of technology exists, but we never stop and find out the backstory of why and how it came to be. Great article, but depressing in that I don't understand 50% of the content and am unlikely to ever do so, despite having two friends in the geo business - one collecting the data and one interpreting it.