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 3 qualities of contour line?
- Must 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.
What are the 6 rules for topographic maps?
- 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.
What are the three types of contour lines on a map?
- 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.
What are the 5 rules of a topographic map?
- Contour Lines Never Cross. …
- Measuring Steepness.
- Stream Flow Direction.
- Contours Close.
- Concentric Circles.
- Elevation Between Lines.
Why can’t contour lines cross?
Contour lines never cross on a topographic map
because each line represents the same elevation level of the land
.
What is the key word of contour?
The
C_ANNOTATION, C_CHARSIZE, and C_LABELS keywords
are used to control contour labeling.
What is contour and its characteristics?
Contours show distinct characteristic features of the terrain as follows: i)
All points on a contour line are of the same elevation
. ii) No two contour lines can meet or cross each other except in the rare case of an overhanging vertical cliff or wall. iii) Closely spaced contour lines indicate steep slope.
What are the uses of contouring?
- It depicture slope and size of different landforms on map.
- It provides complete and clear image of the land and the surrounding area.
- By reading contour interval it is easy to sort out the different elevation of the landscape.
- It provide the basis for coloring method.
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.
How do you identify a contour line?
In
cartography
, a contour line (often just called a “contour”) joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.
What are Hachure lines?
Hachures are
short lines laid down in a pattern to indicate direction of slope
. When it became feasible to map rough terrain in more detail, hachuring developed into an artistic speciality….
What are 4 types of contour lines?
- Isopleth. Isopleth on a contour map connects the places having the same value of some measurable quantity of geographical or meteorological phenomena. …
- Isohyet. …
- Isobar. …
- Isobath. …
- Isohaline. …
- Isotherm. …
- Isohel. …
- Isohume.
What are the 2 types of contour lines?
A. Contour lines are of three different kinds. They are
the Index lines, Intermediate lines and the Supplementary lines
.
What is the space between contour lines called?
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.
