Heatmap

Create a professional heatmap for visualizing data density or intensity. Layout: grid or map-based depending on data type. Color scheme: gradient from light (low) to dark (high) or cold to warm colors (blue to green to yellow to red). Include legend/color bar explaining intensity scale. Labels: clear row and column headers or geographic labels. Title: descriptive at top. Design: modern data visualization, clear color differentiation, accessible palette (avoid red-green only). Style: analytics dashboard, geographic data, activity tracking. Format appropriate to data (square grid, geographic map, calendar). 16:9 or custom.