Mapping
We need to store, in an organized manner, four layers of information:
a) Maps: localization & plans at several scales;
b) Pictures: the only thing we know for sure in advance      is that one can never take too many;
c) Sketches:  keep them all;
d) Video footage.
Remember: Mapping is just a part of the entire project; look at         your project as a motion picture in the making: you         must be the director!