heat maps

A heat map is a visual tool that uses colors to represent data values across a geographic area or a grid, making patterns and differences easier to see. Warmer colors like red or orange typically indicate higher values or concentrated areas, while cooler colors like blue or green show lower values or sparser regions. For example, a heat map of a city might show brightly colored zones where activity or temperature is high, helping to quickly identify hotspots or trends. They are widely used in fields like marketing, urban planning, and health analysis to interpret complex data at a glance.