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(Physical Geography) another name for isopleth
a line representing equality with respect to a given variable, used to relate points on maps, charts, etc.
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|Noun||1.||isogram - a line drawn on a map connecting points having the same numerical value of some variable|
isobar - (meteorology)an isogram connecting points having equal barometric pressure at a given time
isochrone - an isogram connecting points at which something occurs or arrives at the same time
isohel - an isogram connecting points receiving equal amounts of sunshine
isotherm - (meteorology) an isogram connecting points having the same temperature at a given time
line - a spatial location defined by a real or imaginary unidimensional extent