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.
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. 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. 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.
See also
References
- ^ Rameshwar Prasad Misra and A. Ramesh (1989). Fundamentals of cartography (2nd ed.). Concept Publishing Company. p. 438. ISBN 9788170222224.
- ^ Francis John Monkhouse (2007). "A Dictionary of Geography, Second Edition". A Dictionary of Geography (2nd ed.). Aldine Transaction. p. 127. ISBN 9780202361314.
- ^ 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) (16–19). G. Philip: 2, 184.
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