turf-invariant

turf-invariant

getCoord

Unwrap a coordinate from a Feature with a Point geometry, a Point geometry, or a single coordinate.

Parameters

• obj Any any value

Returns Array<number> a coordinate

geojsonType

Enforce expectations about types of GeoJSON objects for Turf.

Parameters

• value GeoJSON any GeoJSON object

• type string expected GeoJSON type

• name string name of calling function

• Throws Error if value is not the expected type.

featureOf

Enforce expectations about types of Feature inputs for Turf. Internally this uses geojsonType to judge geometry types.

Parameters

• feature Feature a feature with an expected geometry type

• type string expected GeoJSON type

• name string name of calling function

• Throws Error error if value is not the expected type.

collectionOf

Enforce expectations about types of FeatureCollection inputs for Turf. Internally this uses geojsonType to judge geometry types.

Parameters

• featurecollection FeatureCollection a featurecollection for which features will be judged

• type string expected GeoJSON type

• name string name of calling function

• Throws Error if value is not the expected type.

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This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. It is maintained in the Turfjs/turf repository, where you can create PRs and issues.

Installation

Install this module individually:

$ npm install turf-invariant

Or install the Turf module that includes it as a function:

$ npm install turf