Beyond the Periphery: Child and Adult Understanding of World Map Continuity

Hennerdal, Pontus

doi:10.1080/00045608.2015.1022091

Cited by 15 publications

(12 citation statements)

References 20 publications

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“…Using sketch maps, Saarinen (1987) concludes from a global study that Eurocentric world maps are the most commonly used map type for a large part of the world, with the exception of East Asia and Oceania, where Sinocentric maps dominate. While Saarinen focuses on the centre of world maps, thus addressing the position and function of map edges only indirectly, Hennerdal (2015) explicitly refers to the user's understanding of world map edges. Testing both children and adults, Hennerdal examines to what extent map users understand peripheral continuation at map edges.…”

Section: Studies On Map Edgesmentioning

confidence: 99%

“…vertical) map edges, and given the increasing poleward distortions of the plate carrée projection, A and B should have a similar latitude. This also reduces the peripheral continuity issues observed by Hennerdal (2015). (2) Since Eurocentric world maps are the standard design for Mexican participants, we are particularly interested in pairs of locations where AB is being cut by an edge on a Eurocentric but not on an Americentric world map (see Figure 2).…”

Section: Test Design and Materialsmentioning

confidence: 99%

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Journey to the End of the World Map – How Edges of World Maps Shape the Spatial Mind

Hruby¹,

Avelino²,

Ayala³

2016

giforum

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World maps are among the most widely used geomedia products for visualizing global phenomena. Since there are, theoretically, infinite ways to portray Earth's spherical surface on a plane, the question of the most appropriate world map design has been widely discussed in recent decades. However, this discussion has focused mainly on different projections, while another basic characteristic of any map, i.e. the presence of map edges, has been largely ignored so far. In view of this gap in cartographic research, this article examines empirically whether spatial relations are memorized differently by learners when these are presented on maps that have differently positioned edges. Distance estimations between locations learnt on Eurocentric and Americentric world maps are compared for this purpose. In line with previous spatial cognition research on barrier effects, our results indicate that distances are memorized more exactly when relevant inter-object relations are not being cut by map edges. Hence, designing an appropriate world map does not seem to be a problem purely of map projection; the position of the map's edges shapes the knowledge that users may acquire when reading a map.

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Section: Studies On Map Edgesmentioning

confidence: 99%

Section: Test Design and Materialsmentioning

confidence: 99%

Journey to the End of the World Map – How Edges of World Maps Shape the Spatial Mind

Hruby¹,

Avelino²,

Ayala³

2016

giforum

View full text Add to dashboard Cite

show abstract

“…As a consequence distances and areas closer to the north and south poles may appear larger and the shapes more distorted than those at the centre [33]. Moreover, distances between geographical locations or areas of continents or seas that are wrapped across the projection boundary are also easily misinterpreted [26].…”

Section: Introductionmentioning

confidence: 99%

GAN'SDA Wrap: Geographic And Network Structured Data on surfaces that Wrap around

Chen,

Dwyer,

Yang

et al. 2022

Preprint

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network layouts to 2D screens has not been studied, nor have such spherical network projections been compared to torus projections. Using the most successful interactive sphere projections from our first study, we compare spherical, standard and toroidal layouts of networks for cluster and path following tasks with 96 participants, finding benefits for both spherical and toroidal layouts over standard network layouts in terms of accuracy for cluster understanding tasks. CCS CONCEPTS• Human-centered computing → Graph drawings; Empirical studies in visualization; Geographic visualization.

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“…Geographic information systems (GIS) have traditionally been used for this task, where different datasets are represented as individual layers in a two-dimensional (2D)-or if altitude is represented a three-dimensional (3D)-coordinate system, which acts as a proxy for the Earth [2,3]. However, the distortion and map edges that result from projecting the surface of the Earth to a plane can affect the accuracy of certain analyses [4,5] and also result in misleading visualizations if one is not careful [6]. Furthermore, when a large volume of data is present, overlaying operations such as intersection and data extraction become computationally expensive [7].…”

Section: Introductionmentioning

confidence: 99%

General Method for Extending Discrete Global Grid Systems to Three Dimensions

Ulmer

Hall

Samavati

2020

IJGI

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Geospatial sensors are generating increasing amounts of three-dimensional (3D) data. While Discrete Global Grid Systems (DGGS) are a useful tool for integrating geospatial data, they provide no native support for 3D data. Several different 3D global grids have been proposed; however, these approaches are not consistent with state-of-the-art DGGSs. In this paper, we propose a general method that can extend any DGGS to the third dimension to operate as a 3D DGGS. This extension is done carefully to ensure any valid DGGS can be supported, including all refinement factors and non-congruent refinement. We define encoding, decoding, and indexing operations in a way that splits responsibility between the surface DGGS and the 3D component, which allows for easy transference of data between the 2D and 3D versions of a DGGS. As a part of this, we use radial mapping functions that serve a similar purpose as polyhedral projection in a conventional DGGS. We validate our method by creating three different 3D DGGSs tailored for three specific use cases. These use cases demonstrate our ability to quickly generate 3D global grids while achieving desired properties such as support for large ranges of altitudes, volume preservation between cells, and custom cell aspect ratio.

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Beyond the Periphery: Child and Adult Understanding of World Map Continuity

Cited by 15 publications

References 20 publications

Journey to the End of the World Map – How Edges of World Maps Shape the Spatial Mind

Journey to the End of the World Map – How Edges of World Maps Shape the Spatial Mind

GAN'SDA Wrap: Geographic And Network Structured Data on surfaces that Wrap around

General Method for Extending Discrete Global Grid Systems to Three Dimensions

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