# Ergograph

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For the muscle-measuring device, see [Mosso's ergograph](/source/Mosso's_ergograph).

An **ergograph** is a graph that shows a relation between human activities and a [seasonal year](/source/Seasonal_year). The name was coined by Dr. [Arthur Geddes](https://en.wikipedia.org/w/index.php?title=Arthur_Geddes&action=edit&redlink=1) of the [University of Edinburgh](/source/University_of_Edinburgh). It can either be a [polar coordinate](/source/Polar_coordinate_system) (circular) or a [cartesian coordinate](/source/Cartesian_coordinate_system) (rectangular) graph, and either a [line graph](/source/Line_chart) or a [bar graph](/source/Bar_chart).[1][2][3]

In polar form, the months of the year are marked around the circumference, forming 30° [sectors](/source/Circular_sector). 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](/source/Radius) of the circle, as a [square root](/source/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](/source/X_axis) is marked for the months of the year, and the [Y axis](/source/Y_axis) is marked with the scale(s) of the activity/activities.[1][2]

## See also

- [Seasonal adjustment](/source/Seasonal_adjustment)

## References

1. ^ [***a***](#cite_ref-MisraRamesh_1-0) [***b***](#cite_ref-MisraRamesh_1-1) [***c***](#cite_ref-MisraRamesh_1-2) Rameshwar Prasad Misra and A. Ramesh (1989). *Fundamentals of cartography* (2nd ed.). Concept Publishing Company. p. 438. [ISBN](/source/ISBN_(identifier)) [9788170222224](https://en.wikipedia.org/wiki/Special:BookSources/9788170222224).

1. ^ [***a***](#cite_ref-Monkhouse_2-0) [***b***](#cite_ref-Monkhouse_2-1) [***c***](#cite_ref-Monkhouse_2-2) Francis John Monkhouse (2007). "A Dictionary of Geography, Second Edition". *A Dictionary of Geography* (2nd ed.). Aldine Transaction. p. 127. [ISBN](/source/ISBN_(identifier)) [9780202361314](https://en.wikipedia.org/wiki/Special:BookSources/9780202361314).

1. ^ [***a***](#cite_ref-Richardson_3-0) [***b***](#cite_ref-Richardson_3-1) Graham T. Richardson (1985). *Illustrations*. Humana Press. pp. 49–50. [ISBN](/source/ISBN_(identifier)) [9780896030701](https://en.wikipedia.org/wiki/Special:BookSources/9780896030701).

## Further reading

- Institute of British Geographers (1950). *Transactions and Papers (Institute of British Geographers)* (16–19). G. Philip: 2, 184. {{[cite journal](https://en.wikipedia.org/wiki/Template:Cite_journal)}}: Missing or empty |title= ([help](https://en.wikipedia.org/wiki/Help:CS1_errors#citation_missing_title))

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Adapted from the Wikipedia article [Ergograph](https://en.wikipedia.org/wiki/Ergograph) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Ergograph?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.