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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\UnitOfMeasure; |
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use PHPCoord\Exception\InvalidRateException; |
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use PHPCoord\Exception\UnknownUnitOfMeasureException; |
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use PHPCoord\UnitOfMeasure\Angle\Angle; |
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use PHPCoord\UnitOfMeasure\Angle\ArcSecond; |
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use PHPCoord\UnitOfMeasure\Length\Centimetre; |
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use PHPCoord\UnitOfMeasure\Length\Metre; |
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use PHPCoord\UnitOfMeasure\Length\Millimetre; |
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use PHPCoord\UnitOfMeasure\Scale\PartsPerBillion; |
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use PHPCoord\UnitOfMeasure\Scale\PartsPerMillion; |
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use PHPCoord\UnitOfMeasure\Time\Time; |
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use PHPCoord\UnitOfMeasure\Time\Year; |
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class Rate implements UnitOfMeasure |
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{ |
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/** |
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* arc-seconds per year |
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* =((pi/180) / 3600) radians per year. Year taken to be IUGS definition of 31556925.445 seconds; see UoM code |
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* 1029. |
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*/ |
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public const EPSG_ARC_SECONDS_PER_YEAR = 'urn:ogc:def:uom:EPSG::1043'; |
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/** |
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* centimetres per year |
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* Year taken to be IUGS definition of 31556925.445 seconds; see UoM code 1029. |
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*/ |
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public const EPSG_CENTIMETRES_PER_YEAR = 'urn:ogc:def:uom:EPSG::1034'; |
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/** |
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* metres per year |
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* Year taken to be IUGS definition of 31556925.445 seconds; see UoM code 1029. |
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*/ |
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public const EPSG_METRES_PER_YEAR = 'urn:ogc:def:uom:EPSG::1042'; |
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/** |
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* milliarc-seconds per year |
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* = ((pi/180) / 3600 / 1000) radians per year. Year taken to be IUGS definition of 31556925.445 seconds; see UoM |
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* code 1029. |
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*/ |
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public const EPSG_MILLIARC_SECONDS_PER_YEAR = 'urn:ogc:def:uom:EPSG::1032'; |
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/** |
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* millimetres per year |
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* Year taken to be IUGS definition of 31556925.445 seconds; see UoM code 1029. |
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*/ |
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public const EPSG_MILLIMETRES_PER_YEAR = 'urn:ogc:def:uom:EPSG::1027'; |
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/** |
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* parts per billion per year |
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* Year taken to be IUGS definition of 31556925.445 seconds; see UoM code 1029. Billion is internationally |
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* ambiguous, in different languages being 1E+9 and 1E+12. One billion taken here to be 1E+9. |
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*/ |
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public const EPSG_PARTS_PER_BILLION_PER_YEAR = 'urn:ogc:def:uom:EPSG::1030'; |
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/** |
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* parts per million per year |
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* Year taken to be IUGS definition of 31556925.445 seconds; see UoM code 1029. |
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*/ |
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public const EPSG_PARTS_PER_MILLION_PER_YEAR = 'urn:ogc:def:uom:EPSG::1041'; |
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protected static array $sridData = [ |
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'urn:ogc:def:uom:EPSG::1027' => [ |
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'name' => 'millimetres per year', |
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], |
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'urn:ogc:def:uom:EPSG::1030' => [ |
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'name' => 'parts per billion per year', |
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], |
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'urn:ogc:def:uom:EPSG::1032' => [ |
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'name' => 'milliarc-seconds per year', |
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], |
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'urn:ogc:def:uom:EPSG::1034' => [ |
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'name' => 'centimetres per year', |
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], |
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'urn:ogc:def:uom:EPSG::1041' => [ |
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'name' => 'parts per million per year', |
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], |
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'urn:ogc:def:uom:EPSG::1042' => [ |
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'name' => 'metres per year', |
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], |
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'urn:ogc:def:uom:EPSG::1043' => [ |
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'name' => 'arc-seconds per year', |
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], |
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]; |
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private UnitOfMeasure $change; |
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private Time $time; |
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private static array $supportedCache = []; |
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public function __construct(UnitOfMeasure $change, Time $time) |
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{ |
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if ($change instanceof Time) { |
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throw new InvalidRateException('A rate is a change per unit of time, the change cannot be time'); |
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} |
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$this->change = $change; |
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$this->time = $time; |
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} |
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public function getChange(): UnitOfMeasure |
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{ |
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return $this->change; |
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} |
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public function getChangePerYear(): UnitOfMeasure |
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{ |
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return $this->change->divide($this->time->asYears()->getValue()); |
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} |
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public function getTime(): Time |
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{ |
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return $this->time; |
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} |
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public function getValue(): float |
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{ |
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return $this->change->getValue(); |
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} |
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public function getUnitName(): string |
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{ |
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return $this->change->getUnitName() . ' per ' . $this->time->getUnitName(); |
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} |
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public function __toString(): string |
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{ |
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return (string) $this->getValue(); |
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} |
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public static function makeUnit(float $measurement, string $srid): self |
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{ |
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if (!isset(static::$sridData[$srid])) { |
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throw new UnknownUnitOfMeasureException($srid); |
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} |
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return match ($srid) { |
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self::EPSG_ARC_SECONDS_PER_YEAR => new self(new ArcSecond($measurement), new Year(1)), |
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self::EPSG_MILLIARC_SECONDS_PER_YEAR => new self(Angle::makeUnit($measurement, Angle::EPSG_MILLIARC_SECOND), new Year(1)), |
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self::EPSG_METRES_PER_YEAR => new self(new Metre($measurement), new Year(1)), |
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self::EPSG_MILLIMETRES_PER_YEAR => new self(new Millimetre($measurement), new Year(1)), |
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self::EPSG_CENTIMETRES_PER_YEAR => new self(new Centimetre($measurement), new Year(1)), |
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self::EPSG_PARTS_PER_BILLION_PER_YEAR => new self(new PartsPerBillion($measurement), new Year(1)), |
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self::EPSG_PARTS_PER_MILLION_PER_YEAR => new self(new PartsPerMillion($measurement), new Year(1)), |
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default => throw new UnknownUnitOfMeasureException($srid), |
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}; |
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} |
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public static function getSupportedSRIDs(): array |
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{ |
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if (!self::$supportedCache) { |
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foreach (static::$sridData as $srid => $data) { |
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self::$supportedCache[$srid] = $data['name']; |
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} |
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} |
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return self::$supportedCache; |
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} |
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} |
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dvdoug /
PHPCoord
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