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<?php
declare(strict_types=1);
namespace PrinsFrank\PhpGeoSVG\Projection;
use PrinsFrank\PhpGeoSVG\Geometry\Position\Position;
abstract class AbstractCylindricalEqualAreaProjection implements Projection
{
abstract public function getStandardParallelDegree(): float;
abstract public function getWidthToHeightAspectRatio(): float;
public function getX(Position $position): float
return (deg2rad($position->longitude) - 0) * cos(deg2rad($this->getStandardParallelDegree()));
}
public function getY(Position $position): float
return sin($position->latitude) / cos($this->getStandardParallelDegree());
public function getMaxX(): float
return 360;
public function getMaxY(): float
return 700;
public function getMaxLatitude(): float
return 90;
PrinsFrank /
php-geo-svg
