FIELD: technology for displaying multilevel text data on volumetric map.
SUBSTANCE: three-dimensional map is displayed on screen, and text data are displayed with varying density levels in accordance to distances from observation point of displayed three-dimensional map to assemblies, where text data are going to be displayed. Further, it is possible to display text data with use of local adjustment of density of text data on screen.
EFFECT: transformation of cartographic data with two-dimensional coordinates to cartographic data with three-dimensional coordinates, thus increasing readability of text data.
2 cl, 11 dwg
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