is::buildMainTree

public function buildMainTree()
{
	$this->queue = false;
	$this->data['TREES']['MAIN'] = array();
	$this->data['MAPS'] = array();
	$this->data['INDEXES'] = array();

	$done = false;
	while(!$done)
		$done = $this->buildMainTreeNext();

	// build name-path index for russia
	$this->buildRussiaPathIndex($this->data['TREES']['MAIN']['EDGES'][self::RUSSIA_YANDEX_CODE], array());
}