Thematic Maps Flashcards

All 7 cards in this deck

What is a choropleth map?

A map where areas are shaded in different colours or densities according to the value of the data for each area.

What is an isoline?

A line on a map joining all the points that have the same value, e.g. all places with a temperature of 16°C.

On an isoline map, what does it mean when the isolines are close together?

The value changes rapidly over a short distance, i.e. a steep gradient.

What is a dot map?

A map on which each dot represents a fixed number of something, placed to show distribution and density.

What is a desire line map?

A map with straight lines drawn from each origin to the destination, showing movement without following the actual route.

What is a proportional symbol map?

A map using symbols whose size is drawn in proportion to the value they represent at that location.

What is a flow line map?

A map with arrows drawn along routes, the width of each arrow proportional to the amount moving; the arrowhead shows the direction.