# XWUIChart2DDensityContour

A 2D density contour chart: a fixed-type wrapper around `XWUIChart` that maps a grid
of values to a filled density surface, so concentration patterns read as shaded
contour regions across two axes. Supply `series` as rows of `{ x, y }` cells (each
series is a row, each point a column value) plus a `block` preset (1-4) and `size`.
Use it to visualize where two-dimensional data clusters - heat-like density over an
x/y field.

## Basic Usage

A 5-row by 7-column grid of randomized values rendered as a density contour
surface.

```example
file: examples/BasicUsage.ts
html: examples/BasicUsage.html
title: Basic Usage
description: A 5x7 grid of random cell values drawn as a shaded density contour.
```

## Taxi Pickup Density

Ride-hailing pickups across five districts and six time-of-day bands, with commute peaks forming bright contour regions.

```example
file: examples/PickupHeat.ts
html: examples/PickupHeat.html
title: Taxi Pickup Density
description: Pickup counts by district and hour drawn as a shaded density surface.
```

## Greenhouse Temperature Field

A 5x5 grid of greenhouse sensor temperatures, where the warm pocket near the south glass reads as a hot contour.

```example
file: examples/GreenhouseTemp.ts
html: examples/GreenhouseTemp.html
title: Greenhouse Temperature Field
description: Sensor-grid temperatures in degrees C drawn as a density field.
```

```api
```