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<?php |
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/** |
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* PHPCoord |
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* @package PHPCoord |
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* @author Jonathan Stott |
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* @author Doug Wright |
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*/ |
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namespace PHPCoord; |
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class AlabamaGrid extends TransverseMercator |
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{ |
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CONST FEET_TO_METERS = 0.3048; |
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public function getReferenceEllipsoid() |
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{ |
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return RefEll::grs80(); |
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} |
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public function getScaleFactor() |
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{ |
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return 0.99996; |
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} |
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public function getOriginNorthing() |
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{ |
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return 0; |
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} |
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public function getOriginEasting() |
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{ |
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return 656166.6666666665 * static::FEET_TO_METERS; |
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} |
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public function getOriginLatitude() |
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{ |
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return 30.5; |
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} |
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public function getOriginLongitude() |
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{ |
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return -85.83333333333333; |
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} |
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/** |
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* Create a new object representing grid ref |
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* |
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* @param int $x |
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* @param int $y |
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* @param int $z |
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*/ |
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public function __construct($x, $y, $z = 0) |
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{ |
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$x = $x * static::FEET_TO_METERS; |
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$y = $y * static::FEET_TO_METERS; |
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parent::__construct($x, $y, $z, RefEll::grs80()); |
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} |
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/** |
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* Convert this grid reference into a latitude and longitude |
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* @return LatLng |
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*/ |
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public function toLatLng() |
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{ |
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$N = $this->y; |
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$E = $this->x; |
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$N0 = $this->getOriginNorthing(); |
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$E0 = $this->getOriginEasting(); |
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$phi0 = $this->getOriginLatitude(); |
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$lambda0 = $this->getOriginLongitude(); |
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return $this->convertToLatitudeLongitude($N, $E, $N0, $E0, $phi0, $lambda0); |
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} |
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/** |
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* String version of coordinate. |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return "({$this->x}, {$this->y})"; |
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} |
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} |
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dvdoug /
PHPCoord
