vancuren/php-turf

A PHP library for geospatial analysis similar to Turf.js

v1.0.4 2024-07-15 16:02 UTC

Requires

• php: ^7.1 || ^8.0

Requires (Dev)

• phpunit/phpunit: ^9.5

AGPL-3.0-or-later

• Russell Van Curen

• geometry
• math
• analysis
• gis
• spatial
• geospatial
• geojson
• vector
• topology
• turf
• turf.js

README

PHP Turf is a PHP library for geospatial analysis similar to Turf.js.

• Installation
• Example
• Usage
• Contributing

Installation

You can install PHP Turf via Composer. Run the following command in your terminal:

composer require vancuren/php-turf

Example

Here's a basic example demonstrating how to use PHP Turf to perform geospatial analysis:

<?php

*require* 'vendor/autoload.php';

use Vancuren\PhpTurf\Point;

*// Create some points*
$point1 = new Point([-73.9864, 40.7486]); *// New York, NY*
$point2 = new Point([-118.2437, 34.0522]); *// Los Angeles, CA*

*// Calculate distance between points*
$distance = Measurement::distance($point1, $point2);
echo "Distance between New York and Los Angeles: " . $distance . " kilometers\n";

Usage

Helpers

Point

Creates a Point feature from a coordinate.

$point1 = new Point([-73.9864, 40.7486]); // New York, NY*
$point2 = new Point([-118.2437, 34.0522]); // Los Angeles, CA*

Polygon

Creates a Polygon feature from an array of coordinates.

$coords = [[[0, 0],[0, 4],[3, 4],[3, 0],[0, 0]]];

$polygon = new Polygon($coords);

LineString

Creates a new line string

$points = [[0, 0],[1, 1],[2, 2]];

$lineString = new LineString($points);

FeatureCollection

Takes one or more Features and creates a FeatureCollection.

$features = [ 
    new Point([1,2]),
    new Point([1,3]),
    new Point([1,4]),
    new Point([1,5])
];

$featureCollection = new FeatureCollection($features);

Measurement

Area

Returns the polygon’s area

$coords = [[[0, 0],[0, 4],[3, 4],[3, 0],[0, 0]]];

$polygon = new Polygon($coords);
$area = Measurement::area($polygon);

Bearing

Calculate the bearing between two points

$point1 = new Point([-73.9864, 40.7486]); *// New York, NY*
$point2 = new Point([-118.2437, 34.0522]); *// Los Angeles, CA*

$bearing = Measurement::bearing($point1, $point2);

Center

Takes a Feature or FeatureCollection and returns the absolute center point of all features.

$points = [
    new Point([-73.9864, 40.7486]), // New York, NY
    new Point([-118.2437, 34.0522]), // Los Angeles, CA
    new Point([-87.6298, 41.8781]), // Chicago, IL
    new Point([-95.3698, 29.7604]) // Houston, TX
];

$featureCollection = new FeatureCollection($points);
$center = Measurement::center($featureCollection);

Destination

Calculate the destination point from a given point, distance, and bearing

$point = new Point([-73.9864, 40.7486]); *// New York, NY*
$distance = 3944; *// Roughly the distance to Los Angeles, CA*
$bearing = 273; *// Bearing to Los Angeles, CA*

$destination = Measurement::destination($point, $distance, $bearing);

Distance

Calculate the distance between two points

$point1 = new Point([-73.9864, 40.7486]); *// New York, NY*
$point2 = new Point([-118.2437, 34.0522]); *// Los Angeles, CA*

$distance = Measurement::distance($point1, $point2);

Midpoint

Calculate the midpoint between two points

$point1 = new Point([-73.9864, 40.7486]); *// New York, NY*
$point2 = new Point([-118.2437, 34.0522]); *// Los Angeles, CA*

$midpoint = Measurement::midpoint($point1, $point2);

Coordinate Mutation

TODO - Need to implement Coordinate Mutation ...

Transformation

TODO - Need to implement Transformation ...

Feature Conversion

TODO - Need to implement Feature Conversion ...

Misc

Nearest Point

Find the nearest point to a reference point

$referencePoint = new Point([-73.9864, 40.7486]); *// New York, NY*

$points = [
    new Point([-118.2437, 34.0522]), *// Los Angeles, CA*
    new Point([-87.6298, 41.8781]),  *// Chicago, IL*
    new Point([-95.3698, 29.7604])   *// Houston, TX*
];

$nearestPoint = Measurement::nearestPoint($referencePoint, $points);

Contains Point

Checks to see if a polygon contains a point.

$vertices = [[[0, 0],[0, 4],[3, 4],[3, 0],[0, 0]]];

$polygon = new Polygon($vertices);

$insidePoint = new Point([2, 2]);
$outsidePoint = new Point([5, 5]);

$isPointInside = $polygon->containsPoint($insidePoint); // TRUE
$isPointInside = $polygon->containsPoint($outsidePoint); // FALSE

Random

Misc

Get Points

Returns the points that create the line string.

$points = [
    [0, 0],
    [1, 1],
    [2, 2]
];

$lineString = new LineString($points);
$result = $lineString->getPoints();

Contributing

Contributions are welcome! Please feel free to submit pull requests or open issues if you encounter any problems or have suggestions for improvement.

Backers

Thank you to all our backers! 🙏

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License

This project is licensed under the GNU AGPLv3 License. See the LICENSE file for details.