Client

Client providing access to weather data from WeatherLayers Cloud or a compatible catalog

Example

Configure client with your WeatherLayers Cloud access token created in WeatherLayers Account.

import * as WeatherLayersClient from 'weatherlayers-gl/client';

// use your WeatherLayers Cloud access token
const client = new WeatherLayersClient.Client({
  accessToken: 'xxx',
  datetimeInterpolate: true,
});

// load dataset slice, load data in the first available datetime
const dataset = 'gfs/wind_10m_above_ground';
const {title, unitFormat, attribution, referenceDatetimeRange, palette} = await client.loadDataset(dataset);
const {datetimes} = await client.loadDatasetSlice(dataset, datetimeRange);
const datetime = datetimes[0];
const {image, image2, imageWeight, imageType, imageUnscale, bounds} = await client.loadDatasetData(dataset, datetime);

Example: Load current data

// load current data
const dataset = 'gfs/wind_10m_above_ground';
const {title, unitFormat, attribution, referenceDatetimeRange, palette} = await client.loadDataset(dataset);
const {image, image2, imageWeight, imageType, imageUnscale, bounds} = await client.loadDatasetData(dataset);

Example: Load data by datetime

// calculate the datetime range for visualization as 0-24 forecast
const datetimeRange = WeatherLayers.offsetDatetimeRange(new Date().toISOString(), 0, 24);

// load dataset slice, load data in the first available datetime
const dataset = 'gfs/wind_10m_above_ground';
const {title, unitFormat, attribution, referenceDatetimeRange, palette} = await client.loadDataset(dataset);
const {datetimes} = await client.loadDatasetSlice(dataset, datetimeRange);
const datetime = datetimes[0];
const {image, image2, imageWeight, imageType, imageUnscale, bounds} = await client.loadDatasetData(dataset, datetime);

Constructor

Client(config: ClientConfig = {})

Config properties

url

Type: string, optional

Default: https://catalog.weatherlayers.com (WeatherLayers Cloud)

Catalog url

accessToken

Type: string, optional

Default: none (but required for WeatherLayers Cloud)

Catalog access token

dataFormat

Type: string, optional

Default: byte.png

GeoTIFF requires geotiff.js as a peer dependency.

unitSystem

Type: UnitSystem, optional

Default: METRIC

Unit system for unit format definition.

attributionLinkClass

Type: string, optional

Attribution link class, used in Dataset, attribution field

datetimeStep

Type: number, optional

Default: 1

Minimal step in hours between datetimes.

datetimeInterpolate

Type: boolean, optional

Enable datetime interpolation.

For example, if a datetime 6:30 is requested, but 6:00 and 7:00 exist, { image: <6:00>, image2: <7:00>, imageWeight: 0.5 } is returned by loadDatasetData.

Methods

loadCatalog(): Promise<string[]>

Loads dataset ids from the catalog.

loadDataset(dataset: string, config: ClientConfig = {}): Promise<Dataset>

Loads dataset metadata from the catalog.

loadDatasetSlice(dataset: string, datetimeRange: DatetimeISOStringRange, config: ClientConfig = {}): Promise<DatasetSlice>

Loads dataset slice with available datetimes in the given datetime range from the catalog.

The current data with offset can be loaded by providing datetimeRange = WeatherLayers.offsetDatetimeRange(new Date().toISOString(), 0, 24).

loadDatasetData(dataset: string, datetime?: DatetimeISOString, config: LoadConfig = {}): Promise<DatasetData>

Loads dataset data at the given datetime from the catalog. If the datetime is not provided, the current data is loaded.