GEOG
361, C. Brewer
Map Generalization
Reading in Slocum: Chapter 6
When to generalize:
congestion, coalescence, conflict,
complication, inconsistency, imperceptibility
How to generalise:
Early model (Robinson et al.): select, simplify, classify, symbolize
Vector-based operations (McMaster etc.; see Figure 6.4 in text)
Points: aggregate
Lines: simplify, smooth, merge, enhance
Areas: amalgamate, collapse
All: displace, exaggerate, refine (eliminate/select)
Example simplification algorithm: Douglas-Poiker
Demonstration tool: Mapshaper.org