▁and ▁dis pro ven . ▁The ▁Q in ▁and ▁Han ▁maps ▁did ▁have ▁a ▁degree ▁of ▁accuracy ▁in ▁scale ▁and ▁pin point ed ▁location , ▁but ▁the ▁major ▁improvement ▁in ▁Pe i ▁X iu ' s ▁work ▁and ▁that ▁of ▁his ▁contempor aries ▁was ▁express ing ▁top ographical ▁elev ation ▁on ▁maps . ▁ ▁S ui ▁In ▁the ▁year ▁ 6 0 5 , ▁during ▁the ▁S ui ▁D ynast y ▁( 5 8 1 – 6 1 8 ), ▁the ▁Com mer cial ▁Commission er ▁Pe i ▁Ju ▁( 5 4 7 – 6 2 7 ) ▁created ▁a ▁famous ▁geomet r ically ▁gr idd ed ▁map . ▁In ▁ 6 1 0 ▁Emperor ▁Yang ▁of ▁S ui ▁ordered ▁government ▁officials ▁from ▁throughout ▁the ▁emp ire ▁to ▁document ▁in ▁gaz ette ers ▁the ▁custom s , ▁products , ▁and ▁ge ographical ▁features ▁of ▁their ▁local ▁areas ▁and ▁provinces , ▁providing ▁descript ive ▁writing ▁and ▁drawing ▁them ▁all ▁onto ▁separate ▁maps , ▁which ▁would ▁be ▁sent ▁to ▁the ▁imperial ▁secret ariat ▁in ▁the ▁capital ▁city . ▁▁ ▁Tang ▁ ▁The ▁Tang ▁D ynast y ▁( 6 1 8 – 9 0 7 ) ▁also ▁had ▁its ▁fair ▁share ▁of ▁cart ograph ers , ▁including ▁the ▁works ▁of ▁X u ▁J ing z ong ▁in ▁ 6 5 8 , ▁Wang ▁M ing y uan ▁in ▁ 6 6 1 , ▁and ▁Wang ▁Zh ong si ▁in ▁ 7 4 7 . ▁Ar gu ably ▁the ▁greatest ▁ge ograph er ▁and ▁cart ograph er