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<?php |
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/* |
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* This file is part of the Runalyze DEM Reader. |
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* |
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* (c) RUNALYZE <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace Runalyze\DEM\Provider\GeoTIFF; |
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use Runalyze\DEM\Exception\InvalidArgumentException; |
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class SRTM4Provider extends AbstractGeoTIFFProvider |
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{ |
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/** @var int */ |
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const MAX_LATITUDE = 60; |
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/** @var int */ |
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const MAX_LONGITUDE = 180; |
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/** @var float */ |
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const DEGREES_PER_TILE = 5.0; |
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/** @var float */ |
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protected $CurrentTileHorizontalReference; |
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/** @var float */ |
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protected $CurrentTileVerticalReference; |
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/** @var float top left latitude */ |
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protected $CurrentTileLatitude; |
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/** @var float top left longitude */ |
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protected $CurrentTileLongitude; |
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/** @var string */ |
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protected $FilenameFormat = 'srtm_%02d_%02d.tif'; |
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/** @var GeoTIFFReader */ |
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protected $ResourceReader; |
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public function initResourceReader() |
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{ |
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$this->ResourceReader = new GeoTIFFReader(); |
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} |
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/** |
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* @param $format |
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*/ |
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public function setFilenameFormat($format) |
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{ |
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$this->FilenameFormat = $format; |
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} |
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/** |
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* @param float $latitude |
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* @param float $longitude |
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* @return string |
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* @throws InvalidArgumentException |
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*/ |
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protected function getFilenameFor($latitude, $longitude) |
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{ |
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$this->loadTileReferencesFor($latitude, $longitude); |
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return sprintf($this->FilenameFormat, $this->CurrentTileHorizontalReference, $this->CurrentTileVerticalReference); |
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} |
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/** |
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* @param float $latitude |
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* @param float $longitude |
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*/ |
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protected function loadTileReferencesFor($latitude, $longitude) |
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{ |
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if (fmod($latitude, static::DEGREES_PER_TILE) === 0.0) { |
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$this->CurrentTileVerticalReference = (static::MAX_LATITUDE - $latitude) / static::DEGREES_PER_TILE + 1; |
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} else { |
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$this->CurrentTileVerticalReference = ceil((static::MAX_LATITUDE - $latitude) / static::DEGREES_PER_TILE); |
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} |
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if (fmod($longitude, static::DEGREES_PER_TILE) === 0.0) { |
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$this->CurrentTileHorizontalReference = (static::MAX_LONGITUDE + $longitude) / static::DEGREES_PER_TILE + 1; |
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} else { |
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$this->CurrentTileHorizontalReference = ceil((static::MAX_LONGITUDE + $longitude) / static::DEGREES_PER_TILE); |
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} |
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$this->CurrentTileLatitude = static::MAX_LATITUDE - (($this->CurrentTileVerticalReference - 1) * static::DEGREES_PER_TILE); |
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$this->CurrentTileLongitude = (($this->CurrentTileHorizontalReference - 1) * static::DEGREES_PER_TILE) - static::MAX_LONGITUDE; |
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if ($latitude < 0) { |
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$this->CurrentTileLatitude = -$this->CurrentTileLatitude; |
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} |
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} |
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/** |
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* @param float $latitude |
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* @param float $longitude |
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* @return float[] array(row, col) |
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*/ |
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protected function getExactRowAndColFor($latitude, $longitude) |
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{ |
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return $this->ResourceReader->getExactRowAndColFor( |
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abs($this->CurrentTileLatitude - abs($latitude)) / static::DEGREES_PER_TILE, |
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abs($this->CurrentTileLongitude - $longitude) / static::DEGREES_PER_TILE |
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); |
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} |
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} |
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Runalyze /
dem-reader
This check looks for assignments to scalar types that may be of the wrong type.
To ensure the code behaves as expected, it may be a good idea to add an explicit type cast.