The second is the isodapane which is a line of total transport costs.
2.
The isodapane is found by adding all of the isotims at a location.
3.
A series of isodapanes ( points of equal transportation cost ) are placed around the minimum cost point, with the curve farthest away from the minimum isodapane representing sites having the highest costs.
4.
An "'isotim "'shows equivalent transport costs from the source of a raw material, and an "'isodapane "'shows equivalent cost of travel time.
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