| A | B |
|---|
| Overlay | The most basic spatial analysis method |
| Buffering | – Identifies areas of interest around a location based on |
| Surface Analysis | When you have lots of individual observations and you want |
| Interpolation | necessary to make estimates where you |
| “heat maps” | should be called density surface maps |
| Cluster Detection | example is John Snow’s map of a cholera outbreak in London |
| Proposed by Ian McHarg in Design with Nature (1969) | Overlay |
| Geographic science | uses a wide range of analytical techniques to take measurements, comparisons, and detect anomalies |
| space-time math | today's method of detecting clusters automatically |
