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  • Liu, Bing  (8)
  • Cartography and geographic base data  (8)
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  • Cartography and geographic base data  (8)
  • 1
    Online Resource
    Online Resource
    Informa UK Limited ; 2020
    In:  Cartography and Geographic Information Science Vol. 47, No. 5 ( 2020-09-02), p. 432-451
    In: Cartography and Geographic Information Science, Informa UK Limited, Vol. 47, No. 5 ( 2020-09-02), p. 432-451
    Type of Medium: Online Resource
    ISSN: 1523-0406 , 1545-0465
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2020
    detail.hit.zdb_id: 2111978-8
    SSG: 14,1
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  • 2
    Online Resource
    Online Resource
    MDPI AG ; 2021
    In:  ISPRS International Journal of Geo-Information Vol. 10, No. 12 ( 2021-11-29), p. 798-
    In: ISPRS International Journal of Geo-Information, MDPI AG, Vol. 10, No. 12 ( 2021-11-29), p. 798-
    Abstract: A high-fidelity 3D urban building model requires large quantities of detailed textures, which can be non-tiled or tiled ones. The fast loading and rendering of these models remain challenges in web-based large-scale 3D city visualization. The traditional texture atlas methods compress all the textures of a model into one atlas, which needs extra blank space, and the size of the atlas is uncontrollable. This paper introduces a size-adaptive texture atlas method that can pack all the textures of a model without losing accuracy and increasing extra storage space. Our method includes two major steps: texture atlas generation and texture atlas remapping. First, all the textures of a model are classified into non-tiled and tiled ones. The maximum supported size of the texture is acquired from the graphics hardware card, and all the textures are packed into one or more atlases. Then, the texture atlases are remapped onto the geometric meshes. For the triangle with the original non-tiled texture, new texture coordinates in the texture atlases can be calculated directly. However, as for the triangle with the original tiled texture, it is clipped into many unit triangles to apply texture mapping. Although the method increases the mesh vertex number, the increased geometric vertices have much less impact on the rendering efficiency compared with the method of increasing the texture space. The experiment results show that our method can significantly improve building model rendering efficiency for large-scale 3D city visualization.
    Type of Medium: Online Resource
    ISSN: 2220-9964
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2655790-3
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  • 3
    In: Geocarto International, Informa UK Limited
    Type of Medium: Online Resource
    ISSN: 1010-6049 , 1752-0762
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2022
    detail.hit.zdb_id: 2109550-4
    SSG: 14
    SSG: 14,1
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  • 4
    Online Resource
    Online Resource
    MDPI AG ; 2020
    In:  ISPRS International Journal of Geo-Information Vol. 9, No. 1 ( 2020-01-15), p. 45-
    In: ISPRS International Journal of Geo-Information, MDPI AG, Vol. 9, No. 1 ( 2020-01-15), p. 45-
    Abstract: While a road pattern influences wayfinding and navigation, its influence on the gaze behaviours of navigating pedestrians is not well documented. In this study, we compared gaze behaviour differences between regular and irregular road patterns using eye-tracking technology. Twenty-one participants performed orientation (ORI) and shortest route selection (SRS) tasks with both road patterns. We used accuracy of answers and response time to estimate overall performance and time to first fixation duration, average fixation duration, fixation count and fixation duration to estimate gaze behaviour. The results showed that participants performed better with better accuracy of answers using irregular road patterns. For both tasks and both road patterns, the Label areas of interest (AOIs) (including shops and signs) received quicker or greater attention. The road patterns influenced gaze behaviour for both Road AOIs and Label AOIs but exhibited a greater influence on Road AOIs in both tasks. In summary, for orientation and route selection, users are more likely to rely on labels, and roads with irregular patterns are important. These findings may serve as the anchor point for determining how people’s gaze behaviours differ depending on road pattern and indicate that labels and unique road patterns should be highlighted for better wayfinding and navigation.
    Type of Medium: Online Resource
    ISSN: 2220-9964
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2655790-3
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  • 5
    Online Resource
    Online Resource
    MDPI AG ; 2018
    In:  ISPRS International Journal of Geo-Information Vol. 7, No. 9 ( 2018-08-22), p. 337-
    In: ISPRS International Journal of Geo-Information, MDPI AG, Vol. 7, No. 9 ( 2018-08-22), p. 337-
    Abstract: In this article, we use eye-tracking methods to analyze the differences in spatial ability between geographers and non-geographers regarding topographic maps, as reflected in the following three aspects: map-based spatial localization, map-based spatial orientation, and map-based spatial visualization. We recruited 32 students from Beijing Normal University (BNU) and divided them into groups of geographers and non-geographers based on their major. In terms of their spatial localization ability, geographers had shorter response times, higher fixation frequencies, and fewer saccades than non-geographers, and the differences were significant. For their spatial orientation ability, compared to non-geographers, geographers had significantly lower response times, lower fixation counts and fewer saccades as well as significantly higher fixation frequencies. In terms of their spatial visualization ability, geographers’ response times were significantly shorter than those of non-geographers, but there was no significant difference between the two groups in terms of fixation count, fixation frequency or saccade count. We also found that compared to geographers, non-geographers usually spent more time completing these tasks. The results of this study are helpful in improving the map-based spatial ability of users of topographic maps.
    Type of Medium: Online Resource
    ISSN: 2220-9964
    Language: English
    Publisher: MDPI AG
    Publication Date: 2018
    detail.hit.zdb_id: 2655790-3
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  • 6
    Online Resource
    Online Resource
    MDPI AG ; 2017
    In:  ISPRS International Journal of Geo-Information Vol. 6, No. 9 ( 2017-09-01), p. 274-
    In: ISPRS International Journal of Geo-Information, MDPI AG, Vol. 6, No. 9 ( 2017-09-01), p. 274-
    Type of Medium: Online Resource
    ISSN: 2220-9964
    Language: English
    Publisher: MDPI AG
    Publication Date: 2017
    detail.hit.zdb_id: 2655790-3
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  • 7
    Online Resource
    Online Resource
    Informa UK Limited ; 2021
    In:  Cartography and Geographic Information Science Vol. 48, No. 4 ( 2021-07-04), p. 305-319
    In: Cartography and Geographic Information Science, Informa UK Limited, Vol. 48, No. 4 ( 2021-07-04), p. 305-319
    Type of Medium: Online Resource
    ISSN: 1523-0406 , 1545-0465
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2021
    detail.hit.zdb_id: 2111978-8
    SSG: 14,1
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  • 8
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2022
    In:  KN - Journal of Cartography and Geographic Information Vol. 72, No. 2 ( 2022-06), p. 129-138
    In: KN - Journal of Cartography and Geographic Information, Springer Science and Business Media LLC, Vol. 72, No. 2 ( 2022-06), p. 129-138
    Abstract: Mixed Reality (MR) wird zunehmend in der Indoor-Navigation eingesetzt. Bei der Entwicklung von MR-Geräten und Indoor-Navigationsalgorithmen wurde den damit verbundenen kognitiven Problemen besondere Aufmerksamkeit geschenkt, und es werden viele Benutzerstudien durchgeführt. Dieses Papier gibt einen Überblick über MR-Technologie, Geräte und das Design von MR-basierten Indoor-Navigationssystemen für Benutzerstudien. Wir schlagen einen theoretischen Rahmen vor, der aus räumlicher Kartierung, räumlicher Lokalisierung, Pfadgenerierung und Visualisierung von Anweisungen besteht. Wir fassen einige kritische Faktoren zusammen, die im Designprozess berücksichtigt werden müssen. Vier Ansätze zum Aufbau eines MR-basierten Indoor-Navigationssystems unter unterschiedlichen Bedingungen werden vorgestellt und verglichen. Unsere gewonnenen Erkenntnisse können genutzt werden, um Forschern bei der Auswahl eines optimalen Designansatzes der MR-basierten Indoor-Navigation für ihre Benutzerstudien zu helfen.
    Type of Medium: Online Resource
    ISSN: 2524-4957 , 2524-4965
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2855040-7
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