Representation of Geographical Features
ICSE · Class 8 · Geography
Quick revision notes for Representation of Geographical Features — ICSE Class 8 Geography. Key concepts, formulas, and definitions for last-minute revision.
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Methods of Representing Relief
- Hachuring is a method of showing relief with short lines that indicate the direction of slope.
- Hill shading shows relief by light and shade.
- Form lines are broken contour-like lines used for inaccessible areas and show approximate heights.
Contours and Contour Interval
- A contour line is an imaginary line joining all places which are at the same height above sea level.
- The coastline is a simple example of a contour line since it joins all places at sea level.
- Contours are drawn in brown on topographical maps.
Landforms Shown by Contours
- A conical hill is shown by closed, almost circular contours with uniform spacing.
- A ridge is a chain of hills or mountains that forms a continuous elevated crest for some distance.
- A watershed ridge is a hilly ridge rising over 100 m.
Pass, Saddle, Col, and Gap
- A pass is formed between two hills or mountains and serves as a land route across a mountain range.
- A col is formed between the ridge of a watershed.
- A saddle is a shallow depression between two peaks at higher elevation and has gentle slopes.
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