mountains are it
A benchmark is just a point on the map, so that you can see where on the map you are.
Topographic map.
Hachured contour lines on a topographic map indicate a depression or a hole in the ground. They are lines that have small perpendicular lines extending from them, pointing inward toward the depression or lower elevation area they represent.
What I need is a topographic map!
Closed circles on a topographic map represent contour lines that indicate a hill or a mountain. The innermost circle typically signifies the highest point of elevation, with elevation decreasing as one moves outward. If the closed circle has hachures (small lines) pointing inward, it represents a depression or a bowl-shaped area instead.
One would use a topographic map to determine the highest point in Louisiana. Topographic maps show the elevation of an area, which can help identify the highest point within a region.
The small loop dot on a topographic map indicates a depression or a low point in the terrain, often referred to as a depression contour. These features are shown with contour lines that form closed loops with hachures (short lines) pointing inward, distinguishing them from hills or peaks. This notation helps map users identify areas where the land dips below the surrounding elevation.
a topographic map
I believe it is a Thematic map.
A high point on a topographic map is typically labeled with a spot elevation, which indicates the exact elevation of that point. This point is usually represented by a small circle with a number inside it, denoting the elevation. You can locate these high points by looking for the circles with numbers on the map.
A topographical map.
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