@turf/flip
Advanced tools
@turf/flip is a module in the Turf.js library that allows you to flip the coordinates of GeoJSON objects. This is useful when you need to switch the order of latitude and longitude coordinates.
Flip Coordinates of a Point
This feature allows you to flip the coordinates of a GeoJSON Point object. The code sample demonstrates how to flip the coordinates of a point from [120.0, 30.0] to [30.0, 120.0].
const turf = require('@turf/turf');
const point = turf.point([120.0, 30.0]);
const flippedPoint = turf.flip(point);
console.log(flippedPoint);Flip Coordinates of a LineString
This feature allows you to flip the coordinates of a GeoJSON LineString object. The code sample demonstrates how to flip the coordinates of a line from [[120.0, 30.0], [121.0, 31.0]] to [[30.0, 120.0], [31.0, 121.0]].
const turf = require('@turf/turf');
const line = turf.lineString([[120.0, 30.0], [121.0, 31.0]]);
const flippedLine = turf.flip(line);
console.log(flippedLine);Flip Coordinates of a Polygon
This feature allows you to flip the coordinates of a GeoJSON Polygon object. The code sample demonstrates how to flip the coordinates of a polygon from [[[120.0, 30.0], [121.0, 31.0], [122.0, 32.0], [120.0, 30.0]]] to [[[30.0, 120.0], [31.0, 121.0], [32.0, 122.0], [30.0, 120.0]]].
const turf = require('@turf/turf');
const polygon = turf.polygon([[[120.0, 30.0], [121.0, 31.0], [122.0, 32.0], [120.0, 30.0]]]);
const flippedPolygon = turf.flip(polygon);
console.log(flippedPolygon);The geojson-rewind package is used to enforce the winding order of GeoJSON polygons. While it doesn't flip coordinates, it ensures that the coordinates follow the right-hand rule. This is different from @turf/flip, which specifically flips the order of latitude and longitude.
The geojson-normalize package is used to normalize various GeoJSON objects into a consistent format. While it doesn't flip coordinates, it ensures that the GeoJSON objects are in a standard format. This is different from @turf/flip, which specifically flips the order of latitude and longitude.
Takes input features and flips all of their coordinates from [x, y] to [y, x].
Parameters
geojson GeoJSON input featuresoptions Object Optional parameters (optional, default {})
options.mutate boolean allows GeoJSON input to be mutated (significant performance increase if true) (optional, default false)Examples
var serbia = turf.point([20.566406, 43.421008]);
var saudiArabia = turf.flip(serbia);
//addToMap
var addToMap = [serbia, saudiArabia];
Returns GeoJSON a feature or set of features of the same type as input with flipped coordinates
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/flip
Or install the Turf module that includes it as a function:
$ npm install @turf/turf
6.2.0
After a bit of hiatus, TurfJS is resuming releases.
@turf/boolean-touches][boolean-touches]Determines if two features touch but do not intersect
@turf/boolean-valid][boolean-valid]Checks if the geometry is a valid according to the OGC Simple Feature Specification
@turf/quadrat-analysis][quadrat-analysis]Performs a quadrat analysis on a set of points
@turf/rectangle-grid][rectangle-grid]Creates a grid of rectangles from a bounding box
@turf/voroni][voronoi]Typescript types for the options parameter have been fixed (PR https://github.com/Turfjs/turf/pull/1424 - Author @stevage)
@turf/points-within-polygon][points-within-polygon]Typescript types around the Feature's Properties will now be preserved. (PR https://github.com/Turfjs/turf/pull/1761 - Author @rugheid)
@turf/rewind][rewind]Typescript types for the 'reverse' option are now correct. Previously it was misnamed as 'reversed'. (PR https://github.com/Turfjs/turf/pull/1786 - Author @jonnycornwell)
@turf/difference][difference]No longer publishes an .mjs file.
@turf/meta][meta]No longer publishes an .mjs file.
@turf/tag][tag]Add MultiPolygon support. (PR https://github.com/Turfjs/turf/pull/1996 - Author bryceroney)
@turf/centroid Don't visit first point twice when calculating centroid
(PR https://github.com/Turfjs/turf/pull/1894 - Author @rowanwins)
@turf/transform-translate Better handling of negative distances
(PR https://github.com/Turfjs/turf/pull/1895 - Author @rowanwins)
@turf/union, @turf/difference, @turf/intersect Use polygon-clipping library to fix correctness issues
(PR https://github.com/Turfjs/turf/pull/1916 - Authors @mbullington, @ngottlieb)
@turf/buffer Change default number of steps to 8, and actually support the steps option
(PR https://github.com/Turfjs/turf/pull/1931 - Author stevenchanin)
@turf/buffer Fix projection issues that produce undersized buffers at non-equatorial latitudes
(PR https://github.com/Turfjs/turf/pull/1956 - Author dyakovlev)
@turf/helpers Add runtime checks to point() method, fixing an API break
(PR https://github.com/Turfjs/turf/pull/1964)
@turf/boolean-overlap Better performance for MultiPoint geometries
(PR https://github.com/Turfjs/turf/pull/1910 - Author @mfedderly)
@turf/helpers Add hectares to convertArea
(PR https://github.com/Turfjs/turf/pull/1943 - Author @DanielJDufour)
@turf/great-circle Update Typescript types to support MultiLineString input
(PR https://github.com/Turfjs/turf/pull/1928 - Author kronick)
@turf/square-grid Clarify inputs
(PR https://github.com/Turfjs/turf/pull/1885 - Author @raphael-leger)
@turf/greater-circle Clarify properties option example
(PR https://github.com/Turfjs/turf/pull/1888 - Author @chris-catignani)
@turf/line-to-polygon no longer modifies its input unless the mutate option is true
(PR https://github.com/Turfjs/turf/pull/1879 - Author @MortenBirk)
@turf/unkink-polygon remove Number.prototype.modulo override
(PR https://github.com/Turfjs/turf/pull/1978)
FAQs
turf flip module
The npm package @turf/flip receives a total of 379,058 weekly downloads. As such, @turf/flip popularity was classified as popular.
We found that @turf/flip demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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