README

Direct & inverse geodesic problems.

The library uses a simple spherical model, not a geoid or even an ellipsoid. The error here will be about 0.06% at full Meridian and about 0.1% at half equator. On smaller segments the error is much smaller and practically suitable for tasks similar to logistics.

Requirements

• php >= ^7.1 || ^8.0

Install via Composer

composer require team-a/geo:^1.0.0

Examples

<?php

use TeamA\Geo;

$Tver      = Geo\Point::create(56.8598, 35.8948);
$SouthPole = Geo\Point::create(-90.0, 0);

$distance = (
    new Geo\Line($Tver, $SouthPole)
)
    ->getDistance()
;

$point2ToSouthPoleLine = Geo\Line::createByBearing($Tver, 90.0, 1000.0);

$initialBearingToSouthPole = $point2ToSouthPoleLine->getInitialBearing();
$finalBearingToSouthPole   = $point2ToSouthPoleLine->getFinalBearing();

$midPoint = $point2ToSouthPoleLine->getMidPoint();