Monkhouse and Wilkenson were graphic
design/ mapmakers, producing textbooks for universities as well as
commercial projects in the late 1960’s and 70’s.
These prints are an exercise, using a method of theirs to display
information in relation to averages. Originally used for displaying
hours of sunlight the technique is here used to display density in
traffic flow. Information is collected via automatic counters at one
point on a national road, and an average is calculated every 15 minutes.
If a given day is above average it will be present as black and if
below will simply be absent.
Table reads as follows:
Left to right, each block representing
Bottom to top, each block representing the given day of the week.
Marker and Pencil on Ivory Carton, (each drawing 70 x 100cm)
click to enlarge
The original sunlight
profiles of Monkhouse and Wilkenson:
As noted by Edgar Tufte:
The image is inverted to extend the metaphor of
light expanding into dark