Ergograph
An ergograph is a graph that shows a relation between human activities and a seasonal year. The name was coined by Dr. Arthur Geddes of the University of Edinburgh. It can either be a polar coordinate (circular) or a cartesian coordinate (rectangular) graph, and either a line graph or a bar graph.[1][2][3]
In polar form, the months of the year are marked around the circumference, forming 30° sectors. Concentric lines display the value being measured. For example an ergograph could show the proportions of time (in hours per day) devoted to each of certain activities, with a time scale, ranging from 0 to 24 hours per day, along the radius of the circle, as a square root scale.[1][2] This form of an ergograph is an example of a polar line graph or (because the data form "bands" on the graph) a polar strata graph or polar layer graph, the "polar" denoting the system of polar coordinates used on the graph.[3] In cartesian form, the X axis is marked for the months of the year, and the Y axis is marked with the scale(s) of the activity/activities.[1][2]
See also
References
- ↑ 1.0 1.1 1.2 Rameshwar Prasad Misra and A. Ramesh (1989). Fundamentals of cartography (2nd ed.). Concept Publishing Company. pp. 438. ISBN 9788170222224.
- ↑ 2.0 2.1 2.2 Francis John Monkhouse (2007). "A Dictionary of Geography, Second Edition". A Dictionary of Geography (2nd ed.). Aldine Transaction. pp. 127. ISBN 9780202361314.
- ↑ 3.0 3.1 Graham T. Richardson (1985). Illustrations. Humana Press. pp. 49–50. ISBN 9780896030701.
Further reading
- Institute of British Geographers (1950). Transactions and Papers (Institute of British Geographers) (G. Philip) (16–19): 2,184.
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