Abstract: Thematic maps of cities can be weakly readable in case of high concentration of point information. One of possibilities to cope with this problem is creating cartograms (anamorphic maps), which increase local scale of area with high concentration of point symbols and decrease where this information is rare. Variable-scale cartogram transformations are made on the basis of isotropic scale changing (using eg. logarithmic representation) or heterogeneous anisotropic transformation through local analysis of point data distribution. An attempt of using points data spatial density coefficient to creating cartogram of urban area maps is shown in this paper. A map of Wrocław was chosen as a testing data. Proposed procedure of creating such thematic maps was implemented and tested using vector data in GIS environment.

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