How Many Types Of Contour Lines Are There?

What is the distance between contour lines?

A contour line is a line drawn on a topographic map to indicate ground elevation or depression.

A contour interval is the vertical distance or difference in elevation between contour lines.

Index contours are bold or thicker lines that appear at every fifth contour line..

What is a contour profile?

A topographic profile or topographic cut is a representation of the relief of the terrain that is obtained by cutting transversely the lines of a topographic map. Each contour line can be defined as a closed line joining relief points at equal height above sea level.

What are contour lines on a map?

Contour line, a line on a map representing an imaginary line on the land surface, all points of which are at the same elevation above a datum plane, usually mean sea level. map: contour lines.

What are the 3 types of contour drawing?

There are several different types of contour line drawings:Blind Contour. ‘Blind contour drawing’ is when contour drawing is done without looking at the paper AT ALL. … Continuous Line Contour. … Modified Contour. … cross-contour. … YOUR ASSIGNMENTS:

What is the shape of contour lines?

The less separation between contour lines means a steeper slope and vice versa. When there are evenly spaced contours, the slope is uniform. At a stream junction, contour lines form a “M” or “W” shape. This can be interpreted as two “V-shaped contours intersecting.

What’s a topography?

Topography is the study of the forms and features of land surfaces. The topography of an area could refer to the surface forms and features themselves, or a description (especially their depiction in maps).

What are the features of contour lines?

Other characteristics of contour lines are: – Horizontal distance between contour lines is inversely proportional to slope. – Uniform slopes have uniformly spaced lines. – Along plane surfaces, contour lines are straight and parallel. – Contour lines are perpendicular to lines of steepest slopes.

How do you read a plan?

The Basics: How to Read Architectural PlansBe organized and diligent when reading plans. Start in upper left corner and work way across page so as not to miss any details.Read the plan cover sheet. … There are often reference points that are used between professionals and sets of drawings. … Review the plan index which provides a list of all plan sheets.

How do you read a plot plan?

Tips on How to Read a Site PlanFind The Title Block. In the bottom right corner of most plans, you’ll find what’s called a title block. … Learn the Plan’s Scale. … Determine the Orientation of the Plan. … Know the Datum Point. … Note the Site’s Contours. … Locate Existing Structures.

Why can’t contour lines cross?

Contour lines can never cross one another. Each line represents a separate elevation, and you can’t have two different elevations at the same point. … Moving from one contour line to another always indicates a change in elevation.

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.

How do you read contour lines on a site plan?

Closely spaced contour lines indicate steep slope. Widely spaced contour lines indicate gentle slope. Equally spaced contour lines indicate uniform slope. Closed contour lines with higher elevation towards the centre indicate hills.

What is the other name of contour lines?

A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value.