map work: relief, gradient & cross section · 2018-09-09 · gradient example gradient of slope...
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Form 3, Term 2
Map Work:
Relief, Gradient & Cross Section
Trigonometrical Station
Spot Height
Layer Colouring
Hill Shading
Contours
Slopes
Close Contour lines = Steep Slopes
Widely Spaced Contour lines = Gentle Slopes
Concave Slopes
Convex Slopes
Uniformed Slopes
Stepped Slopes
Types of Slopes
Gradient
What is Gradient in Maths?
What is Gradient in Geography?
Gradient
Gradient Example
Gradient Example Gradient of slope A-B
1. Gradient = VERTICAL DIFFERENCE
HORIZONTAL DISTANCE
2. Gradient = 900m-400m
2km
3. Gradient = 500m
2000m
4. Gradient = 500/500
2000/500
5. Gradient = 1 OR 1:4
4
The land rises approximately 1 metre for every 4 metres of distance between place A and B.
Cross Section
Intervisibility
Contours & Landforms
Caribbean Environment- pages 326 & 327
Reading Tropical Maps- pages 33-35
Hill
Hill
Knoll (not as high as a Hill)
Plateau
Plateau
Valley
Valley
Spur
Spurs
Ridge
Ridge
Saddle
Saddle/Pass
Col (Higher than a saddle)
Cliff
Cliff
Escarpment
Escarpment
Escarpment
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