☰ Contents · Geography

The course and geographic maps

Lessons 1–2 · 2 lessons · A. Soatov, A. Abdulqosimov, M. Mirakmalov. Geography (Physical Geography of Continents and Oceans), Grade 6, revised 6th edition. O‘qituvchi Publishing House, Tashkent, 2017
2

Geographic maps and their types. Atlases and globes

Textbook: §2, pp. 7–9
GoalExplain the types of maps, scale, and the roles of atlases and globes, and calculate with scale.
New words
scale · masshtabatlas (a system of maps) · atlasglobe (a model of the Earth) · globusthematic map · mavzuli xarita
Explanation

“The language of geography is the map,” people say. By the size of the territory shown, maps are world, continent, country or province maps. By scale they are large-scale (1 : 10 000 to 1 : 200 000), medium-scale (1 : 200 000 to 1 : 1 000 000) and small-scale (1 : 1 000 000 and smaller); a plan is made at 1 : 5000 or larger. By content they are general geographic (physical, political) or thematic (climate, natural zones, etc.). A systematic collection of maps made on one programme is an atlas: the first atlas is considered to be the maps of Claudius Ptolemy (2nd century AD), and the name “atlas” was proposed by Mercator in 1595. A globe is a reduced model of the Earth, and on it sizes and shapes of continents and oceans are not distorted as on flat maps; school globes are made at scales such as 1 : 83 000 000, 1 : 50 000 000, 1 : 40 000 000 and 1 : 30 000 000. Our compatriot Abu Rayhan Beruni is also known for making a globe in the 11th century.

Worked examples
If the scale is 1 : 10 000, 1 cm on the map equals 10 000 cm = 100 m on the ground. So 5 cm = 500 m.
Scale 1 : 1 000 000: 1 cm = 10 km. If two cities are 7 cm apart on the map, the real distance is 70 km.
Class activity

“Scale workshop”: pairs measure the distance between two places on an atlas map with a ruler, calculate the real distance from the scale, and compare with another pair.

Practice
1
Two cities are 4 cm apart on a map with scale 1 : 5 000 000. What is the real distance in km?
2
A globe has scale 1 : 50 000 000. How many km on the ground does 2 cm on the globe correspond to?
3
Which scale-based type does a map at 1 : 2 000 000 belong to?
4
Why does a globe show the shape of the Earth and the proportions of continents more correctly than a flat map?