Those concepts in the geospatial field that have cost us millions of $$$

Every domain has its baggage of concepts, which at first sight don't appear to be that terrible, but which are in practice. Let's start with a non-geospatial example. A lot of programming languages have the concept of a "null" pointer. It is available in the C and C++ programming languages in particular, but in Java as well, or Python, etc.. Tony Hoare, null's creator, regrets its invention: "I…