Random conversation in Matt McGrath’s office a couple years ago after reading Nick Chrisman’s book we all knew

U.S. Bureau of Census DIME (Dual Independent Map Encoding) topological data format was developed

• U.S. Bureau of Census DIME (Dual Independent Map Encoding) topological data format was developed

• Address coding guide – match streets against addresses
• For the New Haven Census Use Study
• Explicit topology for street segments with left/right address ranges, to/from nodes, etc.
• Topology used for data quality/integrity
• Eventually morphed into TIGER in the 1980s

Donald Cooke and William Maxfield (Bureau of the Census) publish first paper in an academic journal on topological data structures

• Donald Cooke and William Maxfield (Bureau of the Census) publish first paper in an academic journal on topological data structures

• The Development of a Geographic Base File and Its Use for Mapping, in Papers from the 5th Annual URISA Conference
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