I do not know how to post images here... but I remember one Pemberleian drawing a plan of Emma's Highbury according to JA's description. And unfortunately the P&P gazeteer only shows real places.
1st idea of the setting in those chapters :
I imagine a triangle with a very acute top angle where Meryton is situated.
One mile away along one of the lines is Longbourn (ch 7: the village of Longbourn was only one mile from Meryton");
one mile away along the other line is Lucas Lodge (cf. ch 5 : "Within a short walk of Longbourn lived a family... A house about a mile from Meryton denominated from that period Lucas Lodge").
Netherfield lies 2 miles away on the opposite side of Meryton: (further down in ch7: "only 3 miles. I shall be back by dinner" Lizzie says)... "We will go as far as Meryton with you, said Catherine and Lydia": 1 mile + 2 is the distance from Longbourn to Netherfield.
Yet, why is there no path to go there? "crossing field after field, jumping over stiles"...)Does it mean that a path would have made too long a detour for her to walk? Maybe there were also fewer paths at that time than now, where the countryside is very much arranged so as to provide walking opportunities for town people.