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geojson
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GeoJson
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Geometry
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File: LinearRing.php
<?php namespace GeoJson\Geometry; /** * LinearRing is a special kind of LineString geometry object. * * Coordinates consist of an array of at least four positions, where the first * and last positions are equivalent. * * @see http://www.geojson.org/geojson-spec.html#linestring * @since 1.0 */ class LinearRing extends LineString { /** * Constructor. * * @param float[][]|Point[] $positions * @param CoordinateResolutionSystem|BoundingBox $arg,... */ public function __construct(array $positions) { if (count($positions) < 4) { throw new \InvalidArgumentException('LinearRing requires at least four positions'); } $lastPosition = end($positions); $firstPosition = reset($positions); $lastPosition = $lastPosition instanceof Point ? $lastPosition->getCoordinates() : $lastPosition; $firstPosition = $firstPosition instanceof Point ? $firstPosition->getCoordinates() : $firstPosition; if ($lastPosition !== $firstPosition) { throw new \InvalidArgumentException('LinearRing requires the first and last positions to be equivalent'); } call_user_func_array(array('parent', '__construct'), func_get_args()); } }