How do you make a topographic map?
Draw a horizontal line on the graph paper that is the length of your profile line Draw vertical lines above your starting and ending points Label the y-axis (vertical lines) with elevations making sure that your scale goes from highest to lowest on your cross-section (see step 3)
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 are the 3 types of contour lines on a map?
Contour lines are of three different kinds They are the Index lines, Intermediate lines and the Supplementary lines
How do you plot a contour plot?
A contour plot is a graphical technique for representing a 3-dimensional surface by plotting constant z slices, called contours, on a 2-dimensional format That is, given a value for z, lines are drawn for connecting the (x,y) coordinates where that z value occurs
What is the contour drawing method?
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 an example of a contour drawing?
Contour line art is a method of drawing where you draw only the outline of an object, without any shading For example, if you wanted to do a contour line drawing of a pear, you’d simply draw the outline of the pear, add a stem, and stop there
What is a draw on a topographic map?
A draw (US) or re-entrant (international) is a terrain feature formed by two parallel ridges or spurs with low ground in between them The area of low ground itself is the draw, and it is defined by the spurs surrounding it
What do contour lines represent on a topographic map?
Elevation contours are imaginary lines connecting points having the same elevation on the surface of the land above or below a reference surface, which is usually mean sea level Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes
What is a topographical drawing?
Topographical Drafting focuses on knowledge and skills essential to map drafting Emphasis is given to plotting of surveyors’ field notes, plotting elevations, contour drawings, plan and profiles, and laying out traverses
What are the 4 rules of topographic maps?
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 are the rules for topographic maps?
Rules of Topographic Maps Contour lines always separate points of higher elevation (uphill) from lower elevation (downhill) Contour lines never cross or intersect Contour lines never split or divide Contour lines always close to form a shape, usually an irregular circle
What are the six rules for reading a topographic map?
Terms in this set (6) Rule 1: Slope The closer the lines are, the steeper the slope Rule 2: Flow and Source of a River/Stream Rule 3: Mountains and Hills Rule 4: Highest possible elevation of a hill/mountain Rule 5: Depressions Rule 6: Lowest possible elevation of a depression
How far apart are contour lines on a topographic map?
Individual contour lines on a topographical map are a fixed interval of elevation apart known as a contour interval Common contour intervals are 5, 10, 20, 40, 80, or 100 feet The actual contour interval of a map depends upon the topography being represented as well as the scale of the map
How do you find elevation on a topographic map?
You can figure out the elevation of any point by finding the nearest labeled line, counting the number of lines above or below it, multiplying by the contour interval, and adding or subtracting the result from the nearest marked contour line The more closely spaced the contour lines, the steeper the slope
How do you draw a contour plot in origin?
Origin makes it easy to customize every aspect of the contour plot, including the color scale and adding labels: Active Graph1, and select Graph: Speed Mode menu to open the dialog Click on the Contour plot in Graph1, and then click on the Set Levels button on the pop-up Mini Toolbars
How do Earth scientists use topographic maps?
Earth scientists use topographic maps for many things: Describing and locating surface features, especially geologic features Determining the slope of the Earth’s surface Determining the direction of flow for surface water, ground water, and mudslides
What is a contour map calculus?
Contour maps are a way to depict functions with a two-dimensional input and a one-dimensional output
What is important in contour drawing?
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 is a contour line drawing different from an outline drawing?
an outline is the line made by the edges of an object Contour lines describe the shape of an object, and include interior detail
How do you describe contour lines in art?
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