OSMatrix

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screenshot (year 2011 interface)

OSMatrix (website) is a tool for visualising mapping progress/quality on various metrics. Developed by the Geography department of the University of Heidelberg, OSMatrix provides an overlay of hexagonal cells visualizing a range of metrics for the data in each cell.

An earlier version made an appearance during the Haiti earthquake response mapping efforts (or perhaps a different tool with the same name) This used a simple grid, more like the QualityStreetMap tool.