The purpose of this thematic map is to assess the evolution and changes in Prague's employment structure (within its administrative borders relevant for the particular year of census), as well as its spatial differentiation in the long-term context of changing economic reality in the 20th and 21st centuries. Based on census data, the map uses a triangular graph to show the percentage of earners1, who stated the industry of their economic activity in the census form, in each of the three basic sectors.
A proportional symbol map then describes the employment structure by industry in greater detail (6 defined industries) and the share of people who didn't state their industry of employment in the census form is also included.