SIGMETs

Overview

The Feature Data Service (FDS) API provides geographic features for a number of products. The client can use these features to render a visual representation of data.

• FDS provides geometric vector data where each feature can be a set of points, a polygon or set of polygons, a linestring or set of linestrings, or any other valid GeoJSON type
• Each feature is described by a set of geographic coordinates and a set of properties.
• Each feature is uniquely identified by the combination of its product key, feature key and valid time; the valid time is used to assign the feature to a unique feature set.
• For additional details about FDS, please see the Weather Company Data | Data Visualization - Weather Imagery | Common Usage Guide

Using FDS products requires a multi-step workflow to retrieve the necessary data for the specific product data request. Step 2 requires the ‘time’ value parameter, found in the response from Step 1.

• Step 1: Get Product Info - Provides time-based labels for the feature sets that are currently available.
• Step 2: Get Features for a Single Tile - Provides all geographic features for a single tile, taken from a single feature set within a specific product.

HTTP Headers and Data Lifetime - Caching and Expiration

For details on appropriate header values as well as caching and expiration definitions, please see The Weather Company Data | API Common Usage Guide.

URL Construction

Product Data Dictionary: 6003 - Aviation SIGMETs

The source of the data includes NOAAport, NWS FTP, WxWire and UKMO feed of WMO bulletins. The product is an active state product such that the last transmission in obsoletes any previous issuance. The disappearance of a feature can be inferred as a cancellation or aging out of the prior feature.

The JSON data includes the following fields:

Standardized Type/Phenomenon Mapping Table