Hence, the term isogloss , from iso - `same' + gloss `word,' to describe the line on a map where the terms are of equal distribution.
( Hence ( , ( ( the term ) ( ( ( ( isogloss , ) ( from ( ( iso - ) ( ` ( same ( ' + ) ) ) ) ) ) ( ( ( ( ( gloss ` ) word ) , ) ' ) ( to ( ( ( describe ( the line ) ) ( on ( a map ) ) ) ( where ( ( the terms ) ( are ( of ( equal distribution ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Hence)) (, ,) (NP (DT the) (NN term)) (VP (VBZ isogloss) (, ,) (PP (IN from) (NP (NP (NN iso)) (: -) (NP (`` `) (JJ same) ('' ') (NNS +)))) (VP (VB gloss) (`` `) (NP (NN word)) (, ,) ('' ') (S (VP (TO to) (VP (VB describe) (NP (DT the) (NN line)) (PP (IN on) (NP (DT a) (NN map))) (SBAR (WHADVP (WRB where)) (S (NP (DT the) (NNS terms)) (VP (VBP are) (PP (IN of) (NP (JJ equal) (NN distribution))))))))))) (. .)))
An isogloss isn't really important on a map. 
( ( An isogloss ) ( ( ( is n't ) ( really ( important ( on ( a map ) ) ) ) ) . ) )
(ROOT (S (NP (DT An) (NNS isogloss)) (VP (VBZ is) (RB n't) (ADJP (RB really) (JJ important) (PP (IN on) (NP (DT a) (NN map))))) (. .)))