Abstract
The goal of the specialized map is to evaluate spatial developments in the ethnic structure of Czechia in the 20th century and the beginning of the 21st and to show the most significant trends in this period. In order to make older high-quality cartographic works accessible to a wider community we used a nationalities map from the Atlas of the Czechoslovak Republic (Atlas republiky Československé) published in 1935 to evaluate the inter-war period.
The map contains data from the 1930 census represented by izolines and proportional symbols created on the basis of combinations of the territorial and population principles. This provides squares placed in the centre of a continuous territory with a population of 4, 6, 9 thousand and so on and with a similar ethnic structure.
The map created from data from the most recent census also works with the level of municipalities. The contour lines (izolines) method for the percentages of persons of Czech, Moravian and Silesian descent in the population makes it possible to compare changes between 1930 and 2011.
The ethnic structure of the population is worked out for ORP2 area which - unlike the map evaluating the situation in 1930 (where there are no borders marked between nationally different territories) - makes it possible to identify the ethnic structure in specific territories.