▁is ▁an ▁online ▁database ▁of ▁hill fort s ― fort ified ▁settlement s ▁built ▁in ▁the ▁Bron ze ▁Age ▁and ▁Iron ▁Age ― in ▁the ▁British ▁Is les . ▁It ▁was ▁compiled ▁by ▁research ers ▁from ▁the ▁University ▁of ▁Edinburgh , ▁the ▁University ▁of ▁Oxford ▁and ▁University ▁College ▁C ork , ▁led ▁by ▁Ian ▁R al ston ▁and ▁Gary ▁Lock . ▁, ▁the ▁at las ▁has ▁ 4 , 1 4 7 ▁entries , ▁which ▁the ▁research ers ▁believe ▁to ▁be ▁all ▁of ▁the ▁ext ant ▁hill fort s ▁in ▁Britain ▁and ▁Ireland . ▁A ▁printed ▁at las ▁is ▁also ▁planned . ▁ ▁The ▁data ▁was ▁coll ated ▁from ▁existing ▁catalog ues ▁of ▁arch ae ological ▁sites ▁such ▁as ▁the ▁National ▁Mon uments ▁Records ▁and ▁county ▁historic ▁environment ▁records . ▁Ar ound ▁ 1 0 0 ▁volunte ers , ▁described ▁as ▁" cit izen ▁scient ists ", ▁also ▁visited ▁sites ▁and ▁contributed ▁information ▁and ▁photograph s ▁to ▁the ▁at las . ▁The ▁research ers ▁noted ▁that ▁despite ▁the ▁conventional ▁name ▁" hill fort s ", ▁under ▁their ▁definition , ▁many ▁are ▁" not ▁on ▁hills ▁and ▁are ▁not ▁really ▁for ts ". ▁They ▁included ▁sites ▁that ▁are ▁now ▁only ▁visible ▁through ▁c rop marks . ▁ ▁The ▁online ▁at las ▁is ▁hosted ▁by ▁the ▁Arts ▁and ▁Human ities ▁Research ▁Council , ▁which ▁fund ed ▁the ▁project , ▁and ▁makes ▁use ▁of ▁Es ri ' s ▁Arc G IS ▁web ▁map ▁application ▁platform . ▁The ▁project ▁also ▁collabor ated ▁with ▁Wikimedia ▁UK ▁to ▁make