What are form lines?
21 Likes
Form lines are the contour lines drawn as broken lines which are used to indicate the approximate heights above sea level. They are used to indicate the elevations of the area which are not accessible for proper survey.
Answered By
13 Likes
What is hachuring used for?
What is a gradient? How is it determined?
What are spot heights? How are they represented on the map?
What is meant by Bench marks? How are they represented on the map?