What Does Hachured Contour Lines Mean?

What are the 5 Rules of contour lines?

Rule 1 – every point of a contour line has the same elevation.

Rule 2 – contour lines separate uphill from downhill.

Rule 3 – contour lines do not touch or cross each other except at a cliff.

Rule 4 – every 5th contour line is darker in color..

What do enclosed contour lines without Hachured lines topographically represent?

When one closed normal contour line is surrounded by another, the inner contour indicates the higher elevation. 13. When one closed hachured contour line is surrounded by another, the inner contour indicates the lower elevation.

What 2 types of lines show elevation differences?

Contour lines are used to show elevation on a topographic map. Lines or isolines on a map that connect points with the same elevation. What does each contour line on a map show? Each contour line shows a different elevation.

What does Index contour mean?

Index contours are bold or thicker lines that appear at every fifth contour line. If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing.

What do circular contour lines indicate?

Contour lines may form circles or ovals. These indicate hills, ridges, or mountains. The peak of a hill or mountain may also include a number, which indicates its elevation. The distance between the contour lines will give you an understanding of the slope of the land.

Can contour lines cross?

1. Contour lines do not cross each other, divide or split. 2. Closely spaced contour lines represent steep slopes, conversely, contour lines that are spaced far apart represent gentle slopes.

What is the rule about contour lines that cross rivers?

Rule # 4- Contour lines that cross a valley or stream are V-shaped. Contour lines “point” upstream when they cross a river or stream. Look at the Mill River in the map to the right. The V points toward the area of higher elevation.

What are form lines?

: a line drawn on a map to depict surface configuration in a generalized manner and usually without indicating elevations — compare contour line.

What does Hachured mean?

hachure \ha-SHUR\ verb. : to denote surfaces in relief (as on a map) by shading with short lines drawn in the direction of slope.

What are the 3 types of contour lines?

There are 3 kinds of contour lines you’ll see on a map: intermediate, index, and supplementary.Index lines are the thickest contour lines and are usually labeled with a number at one point along the line. … Intermediate lines are the thinner, more common, lines between the index lines.More items…

Do steep contour lines indicate water?

Contour lines that are further apart indicates a slope that is relatively flat. The area of the map above boxed in orange shows an area that has a fairly steep slope, while the area boxed in purple is a relatively flat area. Contour lines on the map also show how water will travel across the land.

What are the characteristics of contour lines?

Characteristics of ContoursMust close on themselves, on or off the map.Perpendicular to the direction of max. … Slope between them is assumed uniform.The distance between them indicates the steepness of the slope, gentle or steep.Irregular signify rough, smooth signify gradual slopes.Concentric closed contours: hills or depression.More items…

What is the importance of contour lines?

The purpose of contour lines is to represent the tridimensional shape of the terrestrial surface on a bidimensional map. Contour lines are the intersection of an horizontal plane parallel to the reference level and the topographical surface to describe.

What other names do we call Hachures?

contour linecontour.hachure.isoheight.isohypse.isoline.layer tint.level curve.level line.

What are Hachured contour lines?

To help visualize their values and the topography that they are showing, special contours are used for depressions, when contours enclose areas of lower value. These contours are called HACHURED contour lines. Hachured contour lines have tick marks added to them that point DOWNSLOPE.

What is the rule when a river flows over a contour line?

A general rule of thumb is that water flow is perpendicular to contour lines. In the case of the isolated hill, water flows down on all sides of the hill.