Landform perception accuracy in shaded relief maps : a replication study confirms that nnw lighting is better than nw against the relief inversion effect

dc.contributor.authorColtekin, A.
dc.contributor.authorRautenbach, Victoria
dc.contributor.authorCoetzee, Serena Martha
dc.contributor.authorMokwena, T.
dc.contributor.emailvictoria.rautenbach@up.ac.zaen_ZA
dc.date.accessioned2019-01-24T05:42:16Z
dc.date.available2019-01-24T05:42:16Z
dc.date.issued2018
dc.description.abstractRelief inversion effect is a perceptual phenomenon that leads to an inverted perception of convex and concave shapes. This perceptual inversion occurs in scenes where the shading/shadows act as the main depth cue. In visuospatial displays, such as shaded relief maps, the positioning of the shadows in the northern slopes, thus when light source placed broadly in south, mislead the cognitive system based on the ‘light from above prior’ assumption (Mamassian and Goutcher 2001). Thus, assuming the light must come from above, our mind creates an illusion, and we perceive the landforms incorrectly. To judge the 3D spatial relationships in terrain representations correctly, the relief inversion effect must be avoided. Cartographic convention against this effect is to place the light source at northwest (NW), whereas a recent study demonstrated that north-north-west (NNW), or even north yields more precise results (Biland and Çöltekin, 2016). Since this finding goes against decades of convention, to establish its validity further, we attempted replicating the results with a different sample in South Africa. In this paper, we present our findings, which broadly confirm that the NNW (or also N) is better than NW against the relief inversion effect.en_ZA
dc.description.departmentGeography, Geoinformatics and Meteorologyen_ZA
dc.description.librarianam2019en_ZA
dc.description.sponsorshipPartially supported by the Swiss National Science Foundation (Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung) [grant number 200021_149670] (SNSF project VISDOM).en_ZA
dc.description.urihttp://www.isprs.org/publications/archives.aspxen_ZA
dc.identifier.citationCöltekin, A., Rautenbach, V., Coetzee, S. et al. 2018, 'Landform perception accuracy in shaded relief maps : a replication study confirms that nnw lighting is better than nw against the relief inversion effect', International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. 42, no. 4, pp. 169-175.en_ZA
dc.identifier.issn1682-1750 (print)
dc.identifier.issn2194-9034 (online)
dc.identifier.other10.5194/isprs-archives-XLII-4-101-2018
dc.identifier.urihttp://hdl.handle.net/2263/68222
dc.language.isoenen_ZA
dc.publisherCopernicus Publicationsen_ZA
dc.rights© Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License.en_ZA
dc.subjectRelief inversion effecten_ZA
dc.subjectTerrain reversal effecten_ZA
dc.subjectShaded relief mapsen_ZA
dc.subjectLandform perceptionen_ZA
dc.subjectLight directionen_ZA
dc.subjectFacsimileen_ZA
dc.subjectTerrain representationsen_ZA
dc.subjectSpatial relationshipsen_ZA
dc.subjectReplication studyen_ZA
dc.subjectInversion effectsen_ZA
dc.subjectConcave shapeen_ZA
dc.subjectLight sourceen_ZA
dc.subjectCognitive systemsen_ZA
dc.titleLandform perception accuracy in shaded relief maps : a replication study confirms that nnw lighting is better than nw against the relief inversion effecten_ZA
dc.typeArticleen_ZA

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