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tihoho/backside.php

Created February 10, 2018 19:44
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Search a Earth back-side by lat-lon point
Raw
backside.php
<?php
function backSide($lat, $lon) {
$lat *= -1;
$lon = $lon < 0 ? $lon + 180 : $lon - 180;
return [$lat, $lon];
}
// Usage:
print_r(
baskSide(-58.603671, -130.343008)
);
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