Source Urhttp://www.lewishistoricalsociety.com/wiki/tiki-read_article.php?articleId=65
An isopleth map uses contour lines to display information that is collected over an area rather than a particular point. This map displays the sea level pressure over an area.
An isopleth map uses contour lines to display information that is collected over an area rather than a particular point. This map displays the sea level pressure over an area.
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