Isopleths

Isopleths are very similar to the contouring lines found on a contour map, and are therefore found also on isoline maps like isohyets and isotachs .  Isopleths are lines on a map or diagram connecting points for which a chosen quantity has the same value.  Isopleths are often found is geography and earth science.  The above map shows isopleths of snowfall for Deep South Texas and the Lower Rio Grande Valley.

The map URL is: http://www.srh.noaa.gov/bro/?n=2004event_christmasreport