Eduqas A-Level Geography A110QS
Coastal LandscapesLandscape
Glaciated LandscapesLandscape
Changing Places
Water and Carbon Cycles
Global Migration
Global Governance of the Oceans
Tectonic Hazards
EcosystemsContemporary theme
Economic Growth and Challenge: IndiaContemporary theme
Economic Growth and Challenge: ChinaContemporary theme
Development in an African ContextContemporary theme
Energy Challenges and DilemmasContemporary theme
Weather and ClimateContemporary theme
Geographical Skills
Geographical Skills
Mapping techniques
- 3 things to know
- All three components
Overview
Choropleth map, isoline map and isolines other than contours.
What you need to know
Answer each one before you reveal it.
What is a choropleth map?
State one advantage and one disadvantage of a choropleth map.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is a choropleth map?
Model answer
A choropleth map shades areas according to the value of a variable. Darker shading conventionally represents higher values.
- 2
State one advantage and one disadvantage of a choropleth map.
Model answer
A choropleth shows regional patterns clearly and is quick to read. The technique implies uniformity within each unit and abrupt change at every boundary.
- 3
Why should a choropleth map show density rather than a total?
Model answer
A large area will always have a high total simply because of its size. A map shaded by total therefore shows area rather than the variable of interest.
- 4
What is an isoline map?
Model answer
An isoline map joins points of equal value with a line. Contours joining points of equal height are the familiar example.
- 5
Give two examples of isolines other than contours.
Model answer
Isotherms join points of equal temperature and isobars join points of equal pressure. Isohyets join points of equal rainfall.
- 6
What is an isopleth map?
Model answer
An isopleth map draws lines of equal value for a quantity that is derived rather than directly measured, such as population density. The lines are interpolated between data points.
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