What do the black lines all over the map indicate?

What is the meaning of green line with black dots bordering the green wash?

Identify the following relief features (landform) shown by contours on the given topographical sheet G43S10 on page 22.

(i) Conical hill, gentle slope, steep slope, a saddle, col and pass.

(ii) Find out the contour interval in the given toposheet.

(iii) Identify (a) Nuclear settlement, (b) linear settlement and (c) scattered settlement.

Identify and name the relief feature represented in the given diagram: