A color-coded chart where each color represents a field strength value across the surface of the accessory. Warmer colors (red/orange) indicate higher gauss output. Cooler colors (blue/green) indicate lower field strength. The heatmap provides an immediate visual overview of where the field is strongest and how it's distributed.
A heatmap shows the field strength measured across a surface as color, so the whole footprint reads at a glance. The hottest colors mark where the field is strongest, usually over the center of the coil, and it cools toward the edge. The colorbar on the right maps each color to a field strength.
