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<?php |
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declare(strict_types=1); |
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namespace PHPCoord; |
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use function ord; |
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/** |
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* UTM reference. |
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* @author Jonathan Stott |
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* @author Doug Wright |
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*/ |
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class UTMRef extends TransverseMercator |
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{ |
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/** |
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* Latitude zone. |
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* @var string |
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*/ |
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protected $latZone; |
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/** |
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* Longitude zone. |
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* @var int |
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*/ |
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protected $lngZone; |
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/** |
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* Create a new object representing a UTM reference. |
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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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* @param string $latZone |
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* @param int $lngZone |
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*/ |
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public function __construct(int $x, int $y, int $z, string $latZone, int $lngZone) |
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{ |
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$this->latZone = $latZone; |
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$this->lngZone = $lngZone; |
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parent::__construct($x, $y, $z, RefEll::wgs84()); |
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} |
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/** |
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* @return string |
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*/ |
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public function getLatZone(): string |
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{ |
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return $this->latZone; |
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} |
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/** |
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* @return int |
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*/ |
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public function getLngZone(): int |
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{ |
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return $this->lngZone; |
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} |
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/** |
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* @return RefEll |
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*/ |
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public function getReferenceEllipsoid(): RefEll |
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{ |
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return RefEll::wgs84(); |
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} |
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/** |
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* @return float |
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*/ |
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public function getScaleFactor(): float |
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{ |
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return 0.9996; |
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} |
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/** |
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* @return int |
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*/ |
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public function getOriginNorthing(): int |
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{ |
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return 0; |
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} |
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/** |
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* @return int |
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*/ |
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public function getOriginEasting(): int |
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{ |
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return 500000; |
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} |
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/** |
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* @return float |
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*/ |
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public function getOriginLatitude(): float |
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{ |
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return 0; |
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} |
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/** |
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* @return float |
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*/ |
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public function getOriginLongitude(): float |
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{ |
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return ($this->lngZone - 1) * 6 - 180 + 3; |
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} |
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/** |
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* Return a string representation of this UTM reference. |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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return "{$this->lngZone}{$this->latZone} {$this->x} {$this->y}"; |
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} |
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/** |
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* Convert this UTM reference to a WGS84 latitude and longitude. |
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* @return LatLng |
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*/ |
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public function toLatLng(): LatLng |
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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 = $this->getOriginLongitude(); |
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//Correct northing for southern hemisphere |
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if ((ord($this->latZone) - ord('N')) < 0) { |
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$N -= 10000000; |
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} |
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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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dvdoug /
PHPCoord
