README

PHPGeodetic is a library written in PHP, providing a set of classes for the handling Geodetic of Latitude/Longitude and ECEF coordinates, and conversions between datums

This library provides methods for:

• Conversion of angles (bearings, latitudes and longitudes) between degrees, radians, minutes, seconds and gradians.
• Conversion of distance between metres and kilometres, miles, nautical miles, yards, feet, inches and astronomical units.
• Conversion of areas between square metres, kilometres, hectares, square miles, square yards, acres, etc.
• Calculation of Reference Ellipsoid derived properties such as eccentricity; mean, authalic and volumetric radii; and radius of curvature in the prime vertical and the meridian
• Conversion of positions between Latitude/Longitude and ECEF (Earth-Centred, Earth Fixed); and vice versa.
• Conversion of positions between Latitude/Longitude and UTM (Universal Transverse Mercator); and vice versa.
• Helmert Translations for conversion between datums.
• Great Circle distance calculations using either the Haversine or Vincenty formulae.
• Calculation of Initial and final bearings, and midpoint value for great circle routes.
• Calculation of destinations from a start point, initial bearing and distance.
• Calculation of perimeter, area and centrepoint for regions on an ellipsoid

Requirements

• PHP version 5.3.0 or higher

Installation

We recommend installing this package with Composer.

Via composer

In your project root folder, execute

composer require markbaker/phpgeodetic:dev-master

You should now have the files composer.json and composer.lock as well as the directory vendor in your project directory.

You can then require the Composer autoloader from your code

require 'vendor/autoload.php';

Or, if you already have a composer.json file, then require this package in that file

"require": {
    "markbaker/phpgeodetic": "dev-master"
}

and update composer.

composer update

From Phar

Although we strongly recommend using Composer, we also provide a Phar archive builder that will create a Phar file containing all of the library code.

The phar builder script is in the repository root folder, and can be run using

php buildPhar.php

To use the archive, just require it from your script:

require 'Geodetic.phar';

Standard Autoloader

If you want to run the code without using composer's autoloader, and don't want to build the phar, then required the bootstrap.php file from the repository in your code, and this will enable the autoloader for the library.

require 'bootstrap.php';

Want to contribute?

Fork this library!

License

PHPGeodetic is licensed under LGPL (GNU LESSER GENERAL PUBLIC LICENSE)