Topic
Choropleth map
About: Choropleth map is a research topic. Over the lifetime, 369 publications have been published within this topic receiving 8331 citations. The topic is also known as: blot map.
Papers published on a yearly basis
Papers
TL;DR: Though isopleth maps prove to be consistently less complex than choroplethMap complexity is found to have two components that influence effectiveness in quite different ways, and the only significant difference in effectiveness between the methods is for memory of general patterns, in which case isopleh maps are more effective.
Abstract: Thematic map effectiveness can be defined only in terms of specific user requirements. Consideration of common requirements results in four criteria by which map effectiveness is evaluated: effectiveness for direct acquisition of both specific and general information and for memory of both specific and general information. The influence of visual map complexity and two methods of symbolization (choropleth and shaded isopleth maps) on each aspect of complexity is evaluated. Though isopleth maps prove to be consistently less complex than choropleth maps, the only significant difference in effectiveness between the methods is for memory of general patterns, in which case isopleth maps are more effective. Map complexity is found to have two components that influence effectiveness in quite different ways. Complexity of a mapped distribution is inversely related to effectiveness of maps in communicating general patterns but has little relation to communication of specific details. The second aspect of ...
56 citations
TL;DR: In this paper, pairs of students from two age groups made choropleth maps using Arc View and evidence from their discourse was used to assess aspects of their cartographic understanding as well as the nature of their collaboration.
Abstract: Pairs of students from two age groups made choropleth maps using Arc View. Evidence from their discourse is used to assess aspects of their cartographic understanding as well as the nature of their collaboration. Students from both age groups spent a high percentage of their time talking about cartographic strategy and a low percentage of time on technical aspects of GIS functionality. Older students engaged in more reasoning and questioning. Key areas for teacher intervention include promoting better student understanding of what the mapped data mean (including directionality and numerical characteristics) and the most effective strategies for raising the level of students' conceptual exchange during collaborative learning.
55 citations
TL;DR: In this article, five approaches to produce grid choropleth maps of river discharge are described. But the results depend on the climate data used, and the results of these methods are dependent on the input climate data.
54 citations
23 Oct 2020
TL;DR: This contribution intends to make people of disciplines other than those that are map-related aware of the power of thematic maps and how one can create trustworthy thematic Maps instead of misleading thematicMaps which could, in a worst case, lead to misinterpretation.
Abstract: Since the COVID-19 (coronavirus disease 2019) pandemic is a global phenomenon, many scientists and research organizations create thematic maps to visualize and understand the spatial spread of the disease and to inform mankind. Nowadays, Geographic Information Systems (GIS) and web mapping technologies enable people to create digital maps on demand. This fosters the permanent update of COVID-19 map products, even by non-cartographers, and their publication in news, media and scientific publications. With the ease and speed of map-making, many map creators seem to forget about the fundamental principles of good and easy-to-read thematic choropleth maps, which requires geo-spatial data literacy. Geo-spatial data literacy is an important skill, to be able to judge the reliability of spatial data, and to create ingenuous thematic maps. This contribution intends to make people of disciplines other than those that are map-related aware of the power of thematic maps and how one can create trustworthy thematic maps instead of misleading thematic maps which could, in a worst case, lead to misinterpretation.
54 citations
TL;DR: This work has developed software that will permit users to both design a map and explore the underlying database of the interactive choropleth mapping system.
Abstract: Software for interactive choropleth mapping typically focuses on design, with the assumption that the resulting map will be used like a traditional paper one. We believe that interactive graphics also should enable users to explore the database underlying a map. In this vein, we have developed software that will permit users to both design a map and explore the underlying database. The exploration component, the raison d'etre for the software, includes the following options: Overview, Areas, Reclass, Regions, Tables, and Graphs & Stats. Within Overview, users can display map elements in sequence, any combination of classes, and highlighted subsets of the data. Within Areas, users can determine values associated with areas, compare values for two areas, and determine minimum and maximum values for classes and the entire map. Reclass allows users to reclassify the map data temporarily, thus determining the effect of different classification schemes. The Regions option permits regions to comprise sp...
52 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 19 |
| 2020 | 17 |
| 2019 | 26 |
| 2018 | 17 |
| 2017 | 19 |
| 2016 | 14 |