# XWUIChartHeatmapOnMap

A heatmap-on-map chart variant backed by `XWUIChart` that overlays a value-shaded heat layer onto a geographic base, showing where activity concentrates across space. Supply one named `series` per grid row, each carrying its cells as `{ x, y }` points (column label and value), then choose a `block` (1-4) and `size` preset.

## Basic Usage

Five named rows, each with seven randomized cell values, forming a 5x7 heat layer over the map.

```example
file: examples/BasicUsage.ts
html: examples/BasicUsage.html
title: Basic Usage
description: A 5x7 grid of randomized values rendered as a heatmap on a map at the md preset.
```

## Ride-Share Pickup Heat

A pickup-density heat layer over a city grid, lighting up the downtown core and a riverside nightlife strip.

```example
file: examples/RidePickupDensity.ts
html: examples/RidePickupDensity.html
title: Ride-Share Pickup Heat
description: Friday-night pickup counts per city zone overlaid as a heat layer.
```

## Rainfall Heat Layer

A monthly-rainfall heat layer contrasting a wet coast and foothills against a dry desert band.

```example
file: examples/RainfallGrid.ts
html: examples/RainfallGrid.html
title: Rainfall Heat Layer
description: March rainfall per grid cell shaded across coast, foothills, and desert.
```

```api
```