The process of improving Haz-Map has gone on for over 20 years. First it was a hobby, and in 2007, it became a full-time job. I took a two-year sabbatical in 1994-96 to work on Haz-Map while completing a fellowship in Occupational Medicine at the University of Washington. When I first started adding data to Microsoft Access from the NIOSH Pocket Guide in 1993, I found a book that helped me to answer the first question in the diagram:
"Intelligent databases are databases that manage information in a natural way, making information easy to store, access and use."
"Early maps only showed a few well-known features like the "Pillars of Hercules" (the modern Straits of Gibraltar) or the island of Sicily. Once the map was outlined in terms of its major features, succeeding generations of mapmakers filled in the details, and the coast-lines, mountains and river systems slowly became more precisely defined. Similarly, the concentric designer begins by sketching out the main features, based on the key constraints, and then successively elaborates these until the details are crystallized." [Parsaye & Chignell. Intelligent Database Tools and Applications. 1993]