The estimation of graduated symbols in thematic maps
Abstract
This study deals with the problems which originate from the presentation of data using graduated symbols.Within the last 35 years a large number of cartographical studies concerning this problem have been published. Their results, however, are most often based on statistical parameters, especially on medians, which of course characterize them best by a single number. Too little attention is paid, however, to the range of the results. In this study efforts are made to visualize the whole range of estimates to find the most typical errors which dominate the process of estimation. Only a full understanding of these errors provides a sound foundation for drawing up thematic maps and their legends so that mistakes in interpretation can be kept within acceptable limits.
Published
Issue
Section
License
Authors who publish with Fennia agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal. The license of the published metadata is Creative Commons CC0 1.0 Universal (CC0 1.0).
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a doctoral dissertation or book compilation), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
.png)



