In Pictures: 8 cool heat maps that help visualise Big Data

Big or small, data can be difficult to visualise. These examples use heat maps to put massive data sets into a context that's easy to understand.

RetailNext: In-store Shopping Patterns This heat map might seem a bit unimpressive at first, as it looks like a big color blotch. It's showing the movements of actual customers in a retail store aisle, though. Red areas represent the spots where most customers shop.

Retailers can use the heat map for product placements and to see whether a sales campaign was successful. RetailNext pulls the data from video cameras in the store, Wi-Fi networks and other sensors in the store that track customer movement.

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