@turf/transform-rotate
transformRotate
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 clockwiseoptions
Object Optional parameters (optional, default {}
)
options.pivot
Coord point around which the rotation will be performed (optional, default 'centroid'
)options.mutate
boolean allows GeoJSON input to be mutated (significant performance increase if true) (optional, default false
)
Examples
var poly = turf.polygon([[[0,29],[3.5,29],[2.5,32],[0,29]]]);
var options = {pivot: [0, 25]};
var rotatedPoly = turf.transformRotate(poly, 10, options);
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.
Installation
Install this module individually:
$ npm install @turf/transform-rotate
Or install the Turf module that includes it as a function:
$ npm install @turf/turf