ലംബമായ നിയന്ത്രണങ്ങൾ ഉണ്ടാകും കൂടാതെ അടിസ്ഥാന ഇടത് എഡ്ജ് അൽഗോരിതം അത്തരം ലംബ നിയന്ത്രണങ്ങൾ കൈകാര്യം ചെയ്യുന്നില്ല.
నిలువు అడ్డంకులు ఉంటాయి మరియు ప్రాథమిక ఎడమ అంచు అల్గోరిథం ఆ రకమైన నిలువు అడ్డంకిని నిర్వహించదు.