Table of Contents
A contour line defines the outline of a form, as well as interior structure, without the use of shading. A fundamental basis of drawing, contour lines are usually the first technique children adopt to draw people, houses, and trees.
What is a contour line and what does it represent?
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. Numbers on the lines give the height in feet. (Sea level is zero.) Lines drawn closely together indicate that a slope is steep.
What artists use contour lines?
It helps us to look closer at an image, and especially draws our attention to the lines within an image. Some famous artists who have used contour drawing include Alexander Calder, Egon Schiele, and many more. All you need is a pencil and some paper! Any size paper will do, but sometimes bigger is easier at first.
How do you describe a contour line?
Contour lines are lines drawn on a map connecting points of equal elevation, meaning if you physically followed a contour line, elevation would remain constant. Contour lines show elevation and the shape of the terrain. The line you see will look like a contour line on a topographic map.
How do you identify a contour line?
Other than the obvious trails and rivers, these squiggly lines are contour lines. Put simply, contour lines mark points of equal elevation on a map. If you trace the length of a line with your finger, each point you touch is the same height above sea level.
What is an example of a contour drawing?
Contour line art is also a good way to become more skilled at replicating the outline of an object and developing hand-eye coordination (which we’ll explain more about in the next section). The image on the left is an example of contour line art. The image on the right is NOT because it includes shading.
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 are the uses of contour line?
Contour lines are lines drawn on a map with equal elevation points, so elevation would be constant if you followed the contour line physically. The elevation and terrain shape of the contour lines shows. It is useful because they show the form of the land surface on the map–its topography.
What is the difference between a contour line and an outline?
an outline is the line made by the edges of an object. Contour lines describe the shape of an object, and include interior detail.
Why do artists use contour drawings?
The purpose of contour drawing is to emphasize the mass and volume of the subject rather than the detail; the focus is on the outlined shape of the subject and not the minor details. This technique is manifested in different styles and practiced in drawing development and learning.
How are contours drawn?
contour drawing, version of outline drawing, in which the artist, looking closely at the contour of an object, transfers it in one continuous line to paper without looking down to see what he is doing, except when he needs to place an internal feature such as an eye.
What is the Colour of contour lines?
A)Most contour lines on a map, which are relief features and elevations, are coloured brown. Contour lines, which are commonly curved, parallel brown lines, connect locations of equal elevation to indicate the form and elevation of the ground.
What is a contour object?
You can contour an object to create a series of concentric lines that progress to the inside or outside of the object. The number of contour lines, as well as the distance between lines, can be changed.
Why is cross contour line important in any drawing?
Cross contour lines give us a closer look at the topography of the objects we’re drawing, showing us the lumps, the bumps, and other details we need to make a realistic illustration.
What are the 3 factors that should be considered upon planning and designing of a contour interval to be used for a topographic map?
The Contour Spacing Depends On The Following Factors: The Scale of The Map. The contour interval is inversely proportional to the scale of the map. Nature of The Ground. Purpose and Expansion of the survey work. Time available and Eligible Expenses for field and office work.
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 is the other name of contour lines?
What is another word for contour lines? contours hachures isoheights isohypses isolines.
What is a contour graph?
A contour diagram is simply a graph on the xy-plane that shows curves of equal height for a two-variable function z = f(x, y).
How do you find the contour of an image?
To find contours in an image, follow these steps: Read image as grey scale image. Use cv2. threshold() function to obtain the threshold image. Use cv2. findContours() and pass the threshold image and necessary parameters. findContours() returns contours. You can draw it on the original image or a blank image.
What is the difference between cross contour and contour?
While contour lines describe edges, cross-contours describe form and volume. These lines can follow planes of form, moving around and across objects as well as through them. Think of a topographical map–the lines move across the terrain. Cross-contour lines do the same thing.
What does blind contour mean in art?
Blind contour drawings are made from one continuous line and completed without looking at your paper. The final piece is made up of one continuous line as the pencil or pen stays on the paper so that the artist doesn’t lose where they are or need to look down.
How is contour level selected?
The selection of the contour interval is decided by the survey leader before the start of the mapping process depending upon the ground factors.
How do you read contour lines on a plan?
All points on a contour line are of the same elevation. No two contour lines can meet or cross each other except in the rare case of an overhanging vertical cliff or wall. Closely spaced contour lines indicate steep slope. Widely spaced contour lines indicate gentle slope.
What is the distance between each contour line called?
The elevation difference between two adjacent contour lines is called the contour interval (CI). Usually the contour interval is noted on the map legend. In most topographic maps every 5th contour line is drawn in bold print or wider than other contours. Such lines are called index contour lines.
