Line of equal altitude (7)
I believe the answer is:
contour
(Other definitions for contour that I've seen before include "Feature on map" , "Line on map indicating height" , "Map line of equal altitude" , "Silhouette" , "Outline, shape" .)
I believe the answer is:
contour
(Other definitions for contour that I've seen before include "Feature on map" , "Line on map indicating height" , "Map line of equal altitude" , "Silhouette" , "Outline, shape" .)