> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/ja/data/tilesets/llms.txt)

# Flood Damage Risk for Japan

This tileset reference document includes information to help you use the data in the **Flood Damage Risk for Japan** tileset.

> **Note (pricing): Japan Weather Layers**
> 
> This tileset is part of the [Mapbox Japan Weather Layers](https://docs.mapbox.com/ja/data/tilesets/guides/japan-weather-layers/). These tilesets provide weather and environmental data for Japan and have separate pricing from other Mapbox tilesets.
> 
> See the [Japan Weather Layers guide](https://docs.mapbox.com/ja/data/tilesets/guides/japan-weather-layers/) for more details.

## Overview

**Flood Damage Risk for Japan** is a Mapbox-provided rasterarray tileset that includes **Heavy Rain Emergency Warnings** alerts for Japan..

### Access this Tileset

Use this **Tileset URL** to add this tileset to your map style as a `raster-array` source:

```text
mapbox://mapbox.weather-jp-alert
```

Access this tileset's [TileJSON](https://docs.mapbox.com/help/ja/glossary/tilejson/):

```text
https://api.mapbox.com/v4/mapbox.weather-jp-alert.json?access_token=YOUR_MAPBOX_ACCESS_TOKEN
```

Query this tileset at a specific location using the [Tilequery API](https://docs.mapbox.com/api/ja/maps/tilequery/):

```text
https://api.mapbox.com/v4/mapbox.weather-jp-alert/tilequery/{longitude},{latitude}.json?access_token=YOUR_MAPBOX_ACCESS_TOKEN
```

### Data sources

The data supporting this tileset is sourced from the Japan Meteorological Agency (JMA). [JMA Source Data](https://www.jma.go.jp/jma/kishou/know/bosai/riskmap_inundation.html).

## Layer reference

The Flood Damage Risk for Japan `rasterarray` tileset contains the following layers:

### `alert`

Zoom Range: 0-8Spatial Resolution: 1kmTemporal Resolution: 1 bandValues: 1-7, categoricalUpdate Frequency: 10 minutes

This layer shows locations where **Heavy Rain Emergency Warnings** exist in Japan.

#### Layer Values

This layer contains categorical values:

| Value | Description |
| --- | --- |
| 1 | On the Ocean |
| 2 | No Warning Level |
| 3 | Low Warning Level |
| 4 | Caution |
| 5 | Warning |
| 6 | Danger |
| 7 | Disaster Imminent |