How do you explain contour lines to a child?
Contour lines are lines drawn on a map that show a change in elevation. A contour line may look wavy or circular. Everything near that line is generally the same height from sea level (how high they reach above the average water level).
What are the 3 types of contour maps?
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.
What are the 5 Rules of contour maps?
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.
What is saddle in contouring?
Saddle: A saddle is a low point between two areas of higher ground.. A saddle is illustrated by contour lines that typically looks like an hourglass. Depressions are represented by closed contour lines that have tick marks (hachure lines) pointing toward low ground.
What are the 8 rules of contouring?
|General Rules for Contour Lines|
|1.||Contour lines connect points of equal elevation; therefore every point along a contour line is the exact same elevation.|
|3.||Contour lines never split or divide.|
|4.||Contour lines always separate points of higher elevation (uphill) from lower elevation (downhill).|
What are the methods of contouring?
There are basically 2 methods of contouring – Direct Method and Indirect Method.
- Direct Method of Contouring : High degree of precision is required for large-scale maps with small contour interval.
- Indirect Method of Contouring : It is suitable for undulated ground and hilly areas.
What’s a topographic map for kids?
A topographical map is one that shows the physical features of the land. Besides just showing landforms such as mountains and rivers, the map also shows the elevation changes of the land. Elevation is shown using contour lines. Every point on the map touching the line should be the same elevation.