Here I am breaking down the beginning of my journey in Stoke Newington, London N16 into a thumbnail for the inside cover and first page proper.
My process was thus:
Take the 1st walk on Saturday June 8th - think about what happened - chart it on Google Map and take screensnaps for a visual record - write and draw - nail exactly the page-count (it fell nicely into 14 pages covering the journey, within front and back covers to give a full 16 pages) - write and draw more - finally take the same walk again on Saturday July 20th - this time with camera at the ready.
Then - repeat the thinking, writing, drawing process.
Click on any of these images and they'll get bigger, if you're a detail freak (I know I am).