The Importance of Being Critical of Map Data, Even it is Your Own...

http://spatialreserves.wordpress.com/2013/02/03/be-critical-of-data-even-if-it-is-your-own/

This simple example points to the serious concern about the consequences of using data without being critical of its source, spatial accuracy, precision, lineage, date, collection scale, methods of collection, and other considerations. Be critical of the data, even when it is your own!

Source: Joseph Kerski, Education Manager for ESRI