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<?php |
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/** |
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* PHPCoord. |
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* |
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* @author Doug Wright |
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*/ |
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declare(strict_types=1); |
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namespace PHPCoord; |
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use DateTimeInterface; |
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use PHPCoord\CoordinateReferenceSystem\CoordinateReferenceSystem; |
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use PHPCoord\CoordinateReferenceSystem\Geographic; |
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use PHPCoord\CoordinateReferenceSystem\Projected; |
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use PHPCoord\CoordinateSystem\Cartesian; |
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use PHPCoord\Geometry\GeographicPolygon; |
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use PHPCoord\UnitOfMeasure\Angle\Degree; |
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use PHPCoord\UnitOfMeasure\Length\Length; |
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use PHPCoord\UnitOfMeasure\Length\Metre; |
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use PHPCoord\UnitOfMeasure\Scale\Unity; |
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class UTMPoint extends ProjectedPoint |
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{ |
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public const HEMISPHERE_NORTH = 'N'; |
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public const HEMISPHERE_SOUTH = 'S'; |
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/** |
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* Zone number. |
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*/ |
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protected int $zone; |
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/** |
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* Hemisphere (N or S). |
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*/ |
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protected string $hemisphere; |
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/** |
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* Base CRS. |
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*/ |
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protected Geographic $baseCRS; |
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public function __construct(Length $easting, Length $northing, int $zone, string $hemisphere, Geographic $crs, ?DateTimeInterface $epoch = null) |
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{ |
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$this->zone = $zone; |
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$this->hemisphere = $hemisphere; |
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$this->baseCRS = $crs; |
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$longitudeOrigin = $zone * 6 - 3; |
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if ($hemisphere === self::HEMISPHERE_NORTH) { |
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$boundingBox = GeographicPolygon::createFromArray([[$longitudeOrigin, 0], [$longitudeOrigin, 90], [$longitudeOrigin + 6, 90], [$longitudeOrigin + 6, 0]], false); |
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} else { |
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$boundingBox = GeographicPolygon::createFromArray([[$longitudeOrigin, -90], [$longitudeOrigin, 0], [$longitudeOrigin + 6, 0], [$longitudeOrigin + 6, -90]], false); |
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} |
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$projectedCRS = new Projected( |
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'UTM/' . $crs->getSRID(), |
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Cartesian::fromSRID(Cartesian::EPSG_2D_AXES_EASTING_NORTHING_E_N_ORIENTATIONS_EAST_NORTH_UOM_M), |
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$crs->getDatum(), |
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$boundingBox |
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); |
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parent::__construct($easting, $northing, null, null, $projectedCRS, $epoch); |
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} |
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public function asGeographicPoint(): GeographicPoint |
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{ |
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$latitudeOfNaturalOrigin = new Degree(0); |
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$initialLongitude = new Degree(-180); |
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$scaleFactorAtNaturalOrigin = new Unity(0.9996); |
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$falseEasting = new Metre(500000); |
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$falseNorthing = $this->hemisphere === self::HEMISPHERE_NORTH ? new Metre(0) : new Metre(10000000); |
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$longitudeOrigin = $initialLongitude->add(new Degree($this->zone * 6 - 3)); |
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return $this->transverseMercator($this->getBaseCRS(), $latitudeOfNaturalOrigin, $longitudeOrigin, $scaleFactorAtNaturalOrigin, $falseEasting, $falseNorthing); |
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} |
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public function getZone(): int |
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{ |
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return $this->zone; |
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} |
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public function getHemisphere(): string |
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{ |
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return $this->hemisphere; |
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} |
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public function getBaseCRS(): Geographic |
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{ |
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return $this->baseCRS; |
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} |
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public function convert(CoordinateReferenceSystem $to, bool $ignoreBoundaryRestrictions = false): Point |
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{ |
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return $this->asGeographicPoint()->convert($to, $ignoreBoundaryRestrictions); |
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} |
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public function calculateDistance(Point $to): Length |
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{ |
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if ($this->crs == $to->getCRS()) { |
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return parent::calculateDistance($to); |
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} |
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return $this->asGeographicPoint()->calculateDistance($to); |
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} |
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public function __toString(): string |
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{ |
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return $this->getZone() . $this->getHemisphere() . ' ' . (int) $this->easting->getValue() . ' ' . (int) $this->northing->getValue(); |
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} |
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} |
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dvdoug /
PHPCoord
