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MySQL

Working with Line Maps, the Google Places API, and R

A frequent challenge of visualization is behind the scenes, to get the data and to mold it into the format you need. Do that. Then map.

How to Make a Contour Map

Filled contour plots are useful for looking at density across two dimensions and are often used to visualize geographic data. It's straightforward to make them in R — once you get your data in the right format, that is.