I1S1O1G2R1A1M3
10 points
ISOGRAM is validvalid
a line on a map connecting points of equal value [n ISOGRAMS]
a map line indicating points of equal value, also ISOLINE [n -S]
a line on a map connecting points of equal value [n ISOGRAMS]
a map line indicating points of equal value, also ISOLINE [n -S]