Gallery: Map + Choropleth map + Venn diagram

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Showing visual types:Choropleth map

Map

Venn diagram

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Benefits & pitfalls

Benefits & pitfalls: choropleth map

Shaded maps can emphasise large areas much more than small ones - for example highlighting rural areas over urban, if fixed population areas such as Super Output Areas are shown. Consider providing an alternate mode in which values are represented by circles, or values are scaled by the area size (ie showing density).

How to create your own

Create your own: choropleth map

Chloropleth maps can be created in a range of desktop GIS applications such as MapInfo and ArcGIS.

Maps showing overlap between two indicators

The three maps show Local Authorities with (1) high levels of BNP membership, (2) large non-white populations, and (3) both high levels of BNP membership and large non-white populations. The use of the blue, red and overlap purple colours make this a geographic "Venn diagram", allowing viewers to quickly identify areas with high levels on two separate datasets.

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