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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\CoordinateOperation; |
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use function abs; |
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use PHPCoord\CoordinateReferenceSystem\Geographic; |
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use PHPCoord\GeographicPoint; |
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use PHPCoord\UnitOfMeasure\Angle\ArcSecond; |
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abstract class GeographicGrid extends Grid |
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{ |
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protected const ITERATION_CONVERGENCE = 0.0001; |
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public function applyForwardAdjustment(GeographicPoint $point, Geographic $to): GeographicPoint |
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{ |
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$shifts = $this->getValues($point->getLongitude()->getValue(), $point->getLatitude()->getValue()); |
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$latitude = $point->getLatitude()->add($shifts[0]); |
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$longitude = $point->getLongitude()->add($shifts[1]); |
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$height = $point->getHeight() && $shifts[2] ? $point->getHeight()->add($shifts[2]) : null; |
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return GeographicPoint::create($latitude, $longitude, $height, $to, $point->getCoordinateEpoch()); |
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} |
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public function applyReverseAdjustment(GeographicPoint $point, Geographic $to): GeographicPoint |
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{ |
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$shifts = [new ArcSecond(0), new ArcSecond(0)]; |
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$latitude = $point->getLatitude(); |
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$longitude = $point->getLongitude(); |
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do { |
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$prevShifts = $shifts; |
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$shifts = $this->getValues($longitude->getValue(), $latitude->getValue()); |
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$latitude = $point->getLatitude()->subtract($shifts[0]); |
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$longitude = $point->getLongitude()->subtract($shifts[1]); |
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} while (abs($shifts[0]->subtract($prevShifts[0])->getValue()) > self::ITERATION_CONVERGENCE && abs($shifts[1]->subtract($prevShifts[1])->getValue()) > self::ITERATION_CONVERGENCE); |
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$height = $point->getHeight() && $shifts[2] ? $point->getHeight()->subtract($shifts[2]) : null; |
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return GeographicPoint::create($latitude, $longitude, $height, $to, $point->getCoordinateEpoch()); |
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} |
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} |
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dvdoug /
PHPCoord
