Measuring bumps on the road with Android

I used my Android phone to capture some vertical acceleration and positioning data on the road between Athens and Patras, using the AndroSensor app.

I pasted the data into a Google Docs spreadsheet and then used Google's heatmap layers to produce a heatmap of vertical acceleration on the road. I've also added some markers for the locations where the vertical acceleration exceeds 3m/s2.

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