▁location ▁to ▁another ▁is ▁dist orted , ▁these ▁cart og rams ▁are ▁still ▁useful ▁for ▁travel ▁and ▁analysis . ▁ ▁Production ▁▁ ▁One ▁of ▁the ▁first ▁cart ograph ers ▁to ▁generate ▁cart og rams ▁with ▁the ▁aid ▁of ▁computer ▁visual ization ▁was ▁Wal do ▁Tob ler ▁of ▁U C ▁Santa ▁Barbara ▁in ▁the ▁ 1 9 6 0 s . ▁Prior ▁to ▁Tob ler ' s ▁work , ▁cart og rams ▁were ▁created ▁by ▁hand ▁( as ▁they ▁occasionally ▁still ▁are ). ▁The ▁National ▁Center ▁for ▁Geographic ▁Information ▁and ▁Analysis ▁located ▁on ▁the ▁U C SB ▁campus ▁maintain s ▁an ▁online ▁Cart ogram ▁Central ▁with ▁resources ▁regarding ▁cart og rams . ▁ ▁A ▁number ▁of ▁software ▁packages ▁generate ▁cart og rams . ▁Most ▁of ▁the ▁available ▁cart ogram ▁generation ▁tools ▁work ▁in ▁conj unction ▁with ▁other ▁G IS ▁software ▁tools ▁as ▁add - ons ▁or ▁independently ▁produce ▁cart ographic ▁outputs ▁from ▁G IS ▁data ▁formatted ▁to ▁work ▁with ▁commonly ▁used ▁G IS ▁products . ▁Ex amples ▁of ▁cart ogram ▁software ▁include ▁S cape To ad , ▁Cart , ▁and ▁the ▁Cart ogram ▁Process ing ▁Tool ▁( an ▁Arc Script ▁for ▁ES RI ' s ▁Arc G IS ), ▁which ▁all ▁use ▁the ▁Gast ner - New man ▁algorithm . ▁An ▁alternative ▁algorithm , ▁Cart o 3 F , ▁is ▁also ▁implemented ▁as ▁an ▁independent ▁program ▁for ▁non - com mer cial ▁use ▁on ▁Windows ▁platforms . ▁This ▁program ▁also ▁provides ▁an ▁optimization ▁to ▁the ▁original ▁Doug en ik ▁rub ber - sheet ▁algorithm