Rotates any geojson Feature or Geometry of a specified angle, around its centroid
or a given pivot
point;
all rotations follow the right-hand rule: https://en.wikipedia.org/wiki/Right-hand_rule
Parameters
geojson
GeoJSON object to be rotatedangle
number of rotation (along the vertical axis), from North in decimal degrees, negative clockwisepivot
(Geometry | Feature<Point> | Array<number>) point around which the rotation will be performed (optional, default`centroid`
)mutate
boolean allows GeoJSON input to be mutated (significant performance increase if true) (optional, defaultfalse
)
Examples
var poly = turf.polygon([[[0,29],[3.5,29],[2.5,32],[0,29]]]);
var rotatedPoly = turf.transformRotate(poly, 10, [0, 25]);
//addToMap
var addToMap = [poly, rotatedPoly];
rotatedPoly.properties = {stroke: '#F00', 'stroke-width': 4};
Returns GeoJSON the rotated GeoJSON feature
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.
Install this module individually:
$ npm install @turf/transform-rotate
Or install the Turf module that includes it as a function:
$ npm install @turf/turf