Granularity

• Buckland suggests a points of visibility graph. Each point can be seen by another point. It's typically drawn by hand?
• Why is this a good graph?
• It is a coarse graph and it has pretty good coverage.
• You can also have finer graphs.
• That is, you can graph the same space in an infinite range of granularities.
• What's the advantage of a finer graph?
• What's the disadvantage?
• Do these flip flop for coarser granularities?