Numbers on Thematic Maps: Helpful Simplicity or Too Raw to Be Useful for Map Reading?

As the development of small-scale thematic cartography continues, there is a growing interest in simple graphic solutions, e.g., in the form of numerical values presented on maps to replace or complement well-established quantitative cartographic methods of presentation. Numbers on maps are used as...

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Main Authors: Jolanta Korycka-Skorupa, Izabela Małgorzata Gołębiowska
Format: Article
Language:English
Published: MDPI AG 2020-06-01
Series:ISPRS International Journal of Geo-Information
Subjects:
Online Access:https://www.mdpi.com/2220-9964/9/7/415
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author Jolanta Korycka-Skorupa
Izabela Małgorzata Gołębiowska
author_facet Jolanta Korycka-Skorupa
Izabela Małgorzata Gołębiowska
author_sort Jolanta Korycka-Skorupa
collection DOAJ
description As the development of small-scale thematic cartography continues, there is a growing interest in simple graphic solutions, e.g., in the form of numerical values presented on maps to replace or complement well-established quantitative cartographic methods of presentation. Numbers on maps are used as an independent form of data presentation or function as a supplement to the cartographic presentation, becoming a legend placed directly on the map. Despite the frequent use of numbers on maps, this relatively simple form of presentation has not been extensively empirically evaluated. This article presents the results of an empirical study aimed at comparing the usability of numbers on maps for the presentation of quantitative information to frequently used proportional symbols, for simple map-reading tasks. The study showed that the use of numbers on single-variable and two-variable maps results in a greater number of correct answers and also often an improved response time compared to the use of proportional symbols. Interestingly, the introduction of different sizes of numbers did not significantly affect their usability. Thus, it has been proven that—for some tasks—map users accept this bare-bones version of data presentation, often demonstrating a higher level of preference for it than for proportional symbols.
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spelling doaj.art-5b6a77442fa140dfb5e6d3498353abf72023-11-20T05:10:45ZengMDPI AGISPRS International Journal of Geo-Information2220-99642020-06-019741510.3390/ijgi9070415Numbers on Thematic Maps: Helpful Simplicity or Too Raw to Be Useful for Map Reading?Jolanta Korycka-Skorupa0Izabela Małgorzata Gołębiowska1Department of Geoinformatics, Cartography and Remote Sensing, Faculty of Geography and Regional Studies, University of Warsaw, Krakowskie Przedmiescie 30, 00-927 Warsaw, PolandDepartment of Geoinformatics, Cartography and Remote Sensing, Faculty of Geography and Regional Studies, University of Warsaw, Krakowskie Przedmiescie 30, 00-927 Warsaw, PolandAs the development of small-scale thematic cartography continues, there is a growing interest in simple graphic solutions, e.g., in the form of numerical values presented on maps to replace or complement well-established quantitative cartographic methods of presentation. Numbers on maps are used as an independent form of data presentation or function as a supplement to the cartographic presentation, becoming a legend placed directly on the map. Despite the frequent use of numbers on maps, this relatively simple form of presentation has not been extensively empirically evaluated. This article presents the results of an empirical study aimed at comparing the usability of numbers on maps for the presentation of quantitative information to frequently used proportional symbols, for simple map-reading tasks. The study showed that the use of numbers on single-variable and two-variable maps results in a greater number of correct answers and also often an improved response time compared to the use of proportional symbols. Interestingly, the introduction of different sizes of numbers did not significantly affect their usability. Thus, it has been proven that—for some tasks—map users accept this bare-bones version of data presentation, often demonstrating a higher level of preference for it than for proportional symbols.https://www.mdpi.com/2220-9964/9/7/415numbers on mapsthematic mapchoropleth mapproportional symbolsredundancyvisual variables
spellingShingle Jolanta Korycka-Skorupa
Izabela Małgorzata Gołębiowska
Numbers on Thematic Maps: Helpful Simplicity or Too Raw to Be Useful for Map Reading?
ISPRS International Journal of Geo-Information
numbers on maps
thematic map
choropleth map
proportional symbols
redundancy
visual variables
title Numbers on Thematic Maps: Helpful Simplicity or Too Raw to Be Useful for Map Reading?
title_full Numbers on Thematic Maps: Helpful Simplicity or Too Raw to Be Useful for Map Reading?
title_fullStr Numbers on Thematic Maps: Helpful Simplicity or Too Raw to Be Useful for Map Reading?
title_full_unstemmed Numbers on Thematic Maps: Helpful Simplicity or Too Raw to Be Useful for Map Reading?
title_short Numbers on Thematic Maps: Helpful Simplicity or Too Raw to Be Useful for Map Reading?
title_sort numbers on thematic maps helpful simplicity or too raw to be useful for map reading
topic numbers on maps
thematic map
choropleth map
proportional symbols
redundancy
visual variables
url https://www.mdpi.com/2220-9964/9/7/415
work_keys_str_mv AT jolantakoryckaskorupa numbersonthematicmapshelpfulsimplicityortoorawtobeusefulformapreading
AT izabelamałgorzatagołebiowska numbersonthematicmapshelpfulsimplicityortoorawtobeusefulformapreading