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| 1 | <?php |
| 2 | |
| 3 | namespace Olz\Utils; |
| 4 | |
| 5 | // Source: http://www.swisstopo.admin.ch/internet/swisstopo/en/home/topics/survey/sys/refsys/projections.html (see PDFs under "Documentation") |
| 6 | // Updated 9 dec 2014 |
| 7 | // Please validate your results with NAVREF on-line service: http://www.swisstopo.admin.ch/internet/swisstopo/en/home/apps/calc/navref.html (difference ~ 1-2m) |
| 8 | |
| 9 | class MapUtils { |
| 10 | use WithUtilsTrait; |
| 11 | |
| 12 | // Convert WGS lat/long (° dec) to CH y |
| 13 | public function WGStoCHy(int|float $lat, int|float $long): int|float { |
| 14 | // Converts decimal degrees sexagesimal seconds |
| 15 | $lat = $this->DECtoSEX($lat); |
| 16 | $long = $this->DECtoSEX($long); |
| 17 | |
| 18 | // Auxiliary values (% Bern) |
| 19 | $lat_aux = ($lat - 169028.66) / 10000; |
| 20 | $long_aux = ($long - 26782.5) / 10000; |
| 21 | |
| 22 | // Process Y |
| 23 | return 600072.37 |
| 24 | + 211455.93 * $long_aux |
| 25 | - 10938.51 * $long_aux * $lat_aux |
| 26 | - 0.36 * $long_aux * pow($lat_aux, 2) |
| 27 | - 44.54 * pow($long_aux, 3); |
| 28 | } |
| 29 | |
| 30 | // Convert WGS lat/long (° dec) to CH x |
| 31 | public function WGStoCHx(int|float $lat, int|float $long): int|float { |
| 32 | // Converts decimal degrees sexagesimal seconds |
| 33 | $lat = $this->DECtoSEX($lat); |
| 34 | $long = $this->DECtoSEX($long); |
| 35 | |
| 36 | // Auxiliary values (% Bern) |
| 37 | $lat_aux = ($lat - 169028.66) / 10000; |
| 38 | $long_aux = ($long - 26782.5) / 10000; |
| 39 | |
| 40 | // Process X |
| 41 | return 200147.07 |
| 42 | + 308807.95 * $lat_aux |
| 43 | + 3745.25 * pow($long_aux, 2) |
| 44 | + 76.63 * pow($lat_aux, 2) |
| 45 | - 194.56 * pow($long_aux, 2) * $lat_aux |
| 46 | + 119.79 * pow($lat_aux, 3); |
| 47 | } |
| 48 | |
| 49 | // Convert CH y/x to WGS lat |
| 50 | public function CHtoWGSlat(int|float $y, int|float $x): int|float { |
| 51 | // Converts military to civil and to unit = 1000km |
| 52 | // Auxiliary values (% Bern) |
| 53 | $y_aux = ($y - 600000) / 1000000; |
| 54 | $x_aux = ($x - 200000) / 1000000; |
| 55 | |
| 56 | // Process lat |
| 57 | $lat = 16.9023892 |
| 58 | + 3.238272 * $x_aux |
| 59 | - 0.270978 * pow($y_aux, 2) |
| 60 | - 0.002528 * pow($x_aux, 2) |
| 61 | - 0.0447 * pow($y_aux, 2) * $x_aux |
| 62 | - 0.0140 * pow($x_aux, 3); |
| 63 | |
| 64 | // Unit 10000" to 1 " and converts seconds to degrees (dec) |
| 65 | return $lat * 100 / 36; |
| 66 | } |
| 67 | |
| 68 | // Convert CH y/x to WGS long |
| 69 | public function CHtoWGSlng(int|float $y, int|float $x): int|float { |
| 70 | // Converts military to civil and to unit = 1000km |
| 71 | // Auxiliary values (% Bern) |
| 72 | $y_aux = ($y - 600000) / 1000000; |
| 73 | $x_aux = ($x - 200000) / 1000000; |
| 74 | |
| 75 | // Process long |
| 76 | $long = 2.6779094 |
| 77 | + 4.728982 * $y_aux |
| 78 | + 0.791484 * $y_aux * $x_aux |
| 79 | + 0.1306 * $y_aux * pow($x_aux, 2) |
| 80 | - 0.0436 * pow($y_aux, 3); |
| 81 | |
| 82 | // Unit 10000" to 1 " and converts seconds to degrees (dec) |
| 83 | return $long * 100 / 36; |
| 84 | } |
| 85 | |
| 86 | // Convert DEC angle to SEX DMS |
| 87 | protected function DECtoSEX(int|float $angle): int|float { |
| 88 | // Extract DMS |
| 89 | $deg = intval($angle); |
| 90 | $min = intval(($angle - $deg) * 60); |
| 91 | $sec = ((($angle - $deg) * 60) - $min) * 60; |
| 92 | |
| 93 | // Result in sexagesimal seconds |
| 94 | return $sec + $min * 60 + $deg * 3600; |
| 95 | } |
| 96 | |
| 97 | public static function fromEnv(): self { |
| 98 | return new self(); |
| 99 | } |
| 100 | } |