maparoni/geojsonkit-turf

Requirements

GeoJSONKitTurf requires Xcode 14.x and supports the following minimum deployment targets:

• iOS 15 and above
• macOS 12 and above
• tvOS 15 and above
• visionOS 1.0 and above
• watchOS 8.0 and above

It's also compatible with Linux (and possibly other platforms), as long as you have Swift 5.7 (or above) installed.

Installation

Swift Package Manager

To install GeoJSONKitTurf using the Swift Package Manager, add the following package to the dependencies in your Package.swift file:

.package(name: "GeoJSONKitTurf", url: "https://github.com/maparoni/geojsonkit-turf", from: "0.3.0")

Then use:

import GeoJSONKitTurf

Available functionality

This is a partial port of Turf.js, which adds the following functionality to GeoJSONKit's GeoJSON:

Turf.js | GeoJSONKit-Turf ----|---- turf-along | GeoJSON.LineString.coordinateFromStart(distance:) turf-area | GeoJSON.Polygon.area turf-bbox-clip | GeoJSON.LineString.clipped(to:)<br/>GeoJSON.Polygon.clipped(to:) turf-bearing | GeoJSON.Position.direction(to:)<br/> RadianCoordinate2D.direction(to:) turf-bezier-spline | GeoJSON.LineString.bezier(resolution:sharpness:) turf-boolean-point-in-polygon | GeoJSON.Polygon.contains(:) turf-center | GeoJSON.Geometry.center() | turf-center-of-mass | GeoJSON.Geometry.centerOfMass() | turf-centroid | GeoJSON.Geometry.centroid() | turf-circle | GeoJSON.Polygon(center:radius:) | turf-convex | GeoJSON.convexHull()<br/>Collection<GeoJSON.Position>.convexHull() | turf-destination | GeoJSON.Position.coordinate(at:facing:)<br/> RadianCoordinate2D.coordinate(at:facing:) turf-distance | GeoJSON.Position.distance(to:)<br/>RadianCoordinate2D.distance(to:) turf-helpers#degreesToRadians | GeoJSON.Degrees.toRadians() turf-helpers#radiansToDegrees | GeoJSON.DegreesRadians.toDegrees() turf-helpers#convertLength<br/>turf-helpers#convertArea | Measurement.converted(to:) turf-length | GeoJSON.LineString.distance(from:to:) turf-line-chunk | GeoJSON.LineString.chunked(length:)<br/>GeoJSON.Polygon.LinearRing.chunked(length:) | turf-line-intersect | GeoJSON.LineString.intersection(with:) turf-line-slice | GeoJSON.LineString.sliced(from:to:) turf-line-slice-along | GeoJSON.LineString.trimmed(from:distance:)<br/>GeoJSON.LineString.trimmed(from:to:) turf-midpoint | mid(:_:) turf-nearest-point-on-line | GeoJSON.LineString.closestCoordinate(to:) turf-point-on-feature | GeoJSON.Geometry.nearestPoint(to:)<br/>GeoJSON.Polygon.nearestPoint(to:) turf-polygon-smooth | GeoJSON.Polygon.smooth(iterations:) turf-union | Not provided, but see ASPolygonKit turf-simplify | GeoJSON.simplify(options:)

Additionally, it adds the following features, which do not have a direct equivalent in turf.js:

• GeoJSON.Direction.difference(from:)
• GeoJSON.Direction.wrap(min:max:)
• GeoJSON.LineString.frechetDistance(to:): Determines the Fréchet distance between two line strings, which is a measure of their similarity.
• GeoJSON.GeometryObject(splittingWhenCrossingAntiMeridian:): Breaks up a LineString or Polygon into two when crossing the anti-meridian.

CLI

Comes with a mini-CLI geokitten with these commands:

• geokitten simplify $input to simplify a GeoJSON

Installation

<details> <summary>Via SPM</summary>

First clone or download the repository, then run this:

swift build -c release
sudo cp .build/release/geokitten /usr/local/bin/geokitten

</details>

<details> <summary>Via <a href="https://github.com/yonaskolb/Mint">Mint</a></summary>

mint install maparoni/GeoJSONKit-Turf@main

If you get a permissions error, check this Mint issue.

</details>

Package Metadata

Repository: maparoni/geojsonkit-turf

Default branch: main

README: README.md