choropleth map
/ˈkɒrəʊpleθ/noun
- a map which uses differences in shading, colouring, or the placing of symbols within predefined areas to indicate the average values of a property or quantity in those areas等值区域图, 分区（或分片、分层）着色地图。比较ISOPLETH.
词源
1930s: choropleth from Greek khōra 'region'+plēthos 'multitude'.