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<?php $lat = 60; $lon = 160; $nLon = ($lon / 360) + 0.5; $nLat = abs((asinh(tan(deg2rad($lat))) / M_PI / 2) - 0.5); var_dump($nLon, $nLat);
Output for git.master, git.master_jit, rfc.property-hooks
float(0.9444444444444444) float(0.2903996408605087)

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