Definitions for ergographˈɜr gəˌgræf, -ˌgrɑf
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An ergograph is a graph that shows a relation between human activities, or agricultural/climate factors, and a seasonal year. The name was coined by Dr. Arthur Geddes of the University of Edinburgh. It can either be a polar coördinate or a cartesian coördinate graph, and either a line graph or a bar graph. In cartesian form, the X axis is marked for the months of the year, and the Y axis is marked with the scale of the activity/activities. For example, in the ergograph to the right, the Y axis is marked with both temperature and rainfall/sunshine scales. In polar form, the months of the year are marked around the circumference, forming 30° sectors. Concentric lines display the proportions of time devoted to each of the activities. The time scale, ranging from 0 to 24 hours per day, is along the radius of the circle, and is a square root scale. This form of an ergograph is also known as a polar line graph or a polar strata graph or polar layer graph, the "polar" denoting the system of polar coordinates used on the graph. Ergographs can record human activities or agricultural/climate information, such as rainfall, temperature, humidity, crop types, and crop acreage.
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