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- Data: Cholera cases & water pumps. Both of these are POINT data, not polygons or paths.
- Tools: Street map, with suggested subdivisions of houses
- Inquiry: What is the spatial pattern between the two data types? What causal relationship can be inferred from this relationship?
Thus far, our mapping tools are Google Earth and Google Maps. Can you use them to do the same sort of inquiry? Sure thing. In fact, here's Snow's data, re-created in a webmap: