public function timezoneFromCoords($lat, $long, $time)
{
$default = "UTC";
$tz = null;
if ($this->timezone) {
return $this->timezone;
}
if (isset(self::$previousPoint) && abs($this->distance(self::$previousPoint->lat, self::$previousPoint->long, $lat, $long)) < 50000) {
//previous TZ was less than 50km from here. Use same timezone. Needed as google is taking >3s to return TZ.
return self::$previousPoint->tz;
}
if (!isset($this->googleMaps) || !$this->googleMaps) {
return $default;
}
if (!$time) {
$time = $this->start_day;
}
$tz = $this->googleMaps->timezoneFromCoords($lat, $long, $time);
if (!$tz) {
$error = $this->googleMaps->getError();
$this->error .= $error;
}
if (!$tz) {
if (isset(self::$previousPoint)) {
$tz = self::$previousPoint->tz;
} else {
$tz = $default;
}
$this->output("<br>Unable to find timezone for ride on {$this->current_day}, defaulting to {$tz}.<br>");
} else {
self::$previousPoint = new stdClass();
self::$previousPoint->lat = $lat;
self::$previousPoint->long = $long;
self::$previousPoint->tz = $tz;
}
return $tz;
}
