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检索条件"丛书名=Lecture Notes in Geoinformation and Cartography"

共 1042 条记录，以下是381-390 订阅

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The Usability of a GeoVisual Analytics Environment for the Exploration and Analysis of Different Datasets 28th

The Usability of a GeoVisual Analytics Environment for the E...

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28th International Cartographic Conference (ICC)

作者： Kveladze, Irma Kraak, Menno-Jan van Elzakker, Corne P. J. M. Aalborg Univ Dept Civil Engn Aalborg Denmark Palacky Univ Olomouc Dept Geoinformat Olomouc Czech Republic Univ Twente Fac Geoinformat Sci & Earth Observat Enschede Netherlands

ISBN: (纸本)9783319573366;9783319573359

A GeoVisual Analytics (GVA) environment is based on highly interactive and dynamic visualization techniques intending to reveal knowledge in complex and multivariate datasets. By depicting information, these techniques amplify human capabilities and facilitate the performance of cognitive tasks for pattern recognition, decision-making or analytical reasoning. However, the question is whether those visual representations are suitable for visualization of different types of data to perform similar tasks. The limited usability studies that have been done on interactive analytical environments have failed to yield a definite answer. Therefore, this paper presents an evaluation experiment on how an interactive GVA environment can be designed that will effectively support similar task execution processes for different use cases. In the GVA environment investigated, four graphic representations of the Space-Time Cube (STC), graphs and maps are interactively integrated to allow data manipulation from location, attribute and time perspectives for overview and detailed analysis. The results of the experiment revealed that the four visual representations in a GVA environment appear to be effective and efficient to explore different datasets with similar tasks, but require some sophistication.

关键词： GeoVisual analytics Tools Evaluations

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How Hard Is It to Design Maps for Beginners, Intermediates and Experts? 28th

How Hard Is It to Design Maps for Beginners, Intermediates a...

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28th International Cartographic Conference (ICC)

作者： Albert, Gaspar Ilyes, Virag Szigeti, Csaba Kis, David Varkonyi, David Eotvos Lorand Univ Dept Cartog & Geoinformat Budapest Hungary Eotvos Lorand Univ Dept Survey Stat Budapest Hungary Eotvos Lorand Univ Doctorate Sch Earth Sci Budapest Hungary Eotvos Lorand Univ Fac Informat Budapest Hungary

ISBN: (纸本)9783319573366;9783319573359

An online map reading test was done with 859 subjects to statistically measure the efficiency of information retrieval from three different cartographic images of the same area. The differences between the maps were defined by the graphic variables of size, color, pattern, etc., for six map data categories: linear features, hydrography, land cover, elevations, point-like objects, geographic names. The subjects solved map reading tasks related to these categories. Cartographic images were designed for each of the three map reader groups: beginners, intermediates and experts. The design method and the grouping were based on the results of previous studies, and the grouping was done with a competency test prior to the map reading task. The results showed the effectiveness of information retrieval from the three different cartographic images. Conclusions about the efficiency were done concerning the age, gender and level of expertise of the subjects.

关键词： User-oriented maps Online maps Map data types User studies

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Visualization of Environment-related Information in Augmented Reality: Analysis of User Needs 28th

Visualization of Environment-related Information in Augmente...

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28th International Cartographic Conference (ICC)

作者： Chmelarova, Katerina Sasinka, Cenek Stachon, Zdenek Masaryk Univ Ctr Expt Psychol & Cognit Sci Dept Psychol Brno Czech Republic Masaryk Univ Dept Geog Lab Geoinformat & Cartog Brno Czech Republic

ISBN: (纸本)9783319573366;9783319573359

The main motivation for this study was to enable paragliding pilots to use Augmented Reality features during flight. For orientation in the air, paragliding pilots use a map as the main source of information. It is therefore important that the information is presented in the most easily accessible way. The aim of the present study was to investigate the needs of paragliding pilots with respect to maps and the way maps provide them with information about the environment. The participants were three professional paragliding instructors with different amounts of experience. The methods employed involved a semi-structured interview and a practical, real-flight test involving AR glasses;the test was done by only one of the pilots. Two categories of data were identified, with the first involving data related to geographical terrain and the other to the pilot's immediate surroundings. Our results suggest that an optical see-through display would be more suitable for use in the air than the video-based glasses we utilized. If an optical see-through display were used, the terrain could be seen through the glasses, with terrain-related information displayed in the map. AR could be used to present flight-related information as well. Our findings suggest that the way in which information is presented to pilots should be chosen based on the category of the information, namely, whether it is terrain-related or flight-related. In addition, it was found that the small display in the right corner of the pilot's field of view is rather distractive and insufficient to fulfill the pilots' needs. Our results also showed that future AR applications should be designed to be transferable between different platforms: glasses, mobile phones, and tablets.

关键词： Augmented reality Human-computer interaction User test Map-related information Paragliding Optical see-through display

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The Effect of Regional Variation and Resolution on Geosocial Thematic Signatures for Points of Interest 20th

The Effect of Regional Variation and Resolution on Geosocial...

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20th Conference on Geographic Information Science of the Association-of-Geographic-Information-Libraries-in-Europe (AGILE)

作者： McKenzie, Grant Janowicz, Krzysztof Univ Maryland Dept Geog Sci College Pk MD 20742 USA Univ Calif Santa Barbara Dept Geog STKO Lab Santa Barbara CA 93106 USA

ISBN: (纸本)9783319567594;9783319567587

Computational models of place are a key component of spatial information theory and play an increasing role in research ranging from spatial search to transportation studies. One method to arrive at such models is to extract knowledge from user-generated content e.g., from texts, tags, trajectories, pictures, and so forth. Over the last years, topic modeling techniques such as latent Dirichlet allocation (LDA) have been studied to reveal linguistic patterns that characterize places and their types. Intuitively, people are more likely to describe places such as Yosemite National Park in terms of hiking, nature, and camping than cocktail or dancing. The geo-indicativeness of non-georeferenced text does not only apply to place instances but also place types, e.g., state parks. While different parks will vary greatly with respect to their landscape and thus human descriptions, the distribution of topics common to all parks will differ significantly from other types of places, e.g., night clubs. This aggregation of topics to the type level creates thematic signatures that can be used for place categorization, data cleansing and conflation, semantic search, and so on. To make full use of these signatures, however, requires a better understanding of their intra-type variability as regional differences effect the predictive power of the signatures. Intuitively, the topic composition for place types such as store and office should be less effected by regional differences than the topic composition for types such as monument and mountain. In this work, we approach this regional variability hypothesis by attempting to prove that all place types are aspatial with respect to their thematic signatures. We reject this hypothesis by comparing the signature similarities of 316 place types between major cities in the U.S. We then select the most and least varying place types and compare them to thematic signatures from regions outside of the U.S. Finally, we explore the effects of LD

关键词： Semantic signature Point of interest Place type Geosocial Topic modeling

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Extraction of Ridge Lines from Grid DEMs with the Steepest Ascent Method Based on Constrained Direction 28th

Extraction of Ridge Lines from Grid DEMs with the Steepest A...

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28th International Cartographic Conference (ICC)

作者： Jiang, Wenping Xi, Daping Deng, Xiaolong Huang, Lina Ying, Shen Wuhan Univ Sch Resource & Environm Sci Wuhan Hubei Peoples R China China Univ Geosci Fac Informat Engn Wuhan Hubei Peoples R China CMB Network Technol Co Ltd Shenzhen Guangdong Peoples R China

ISBN: (纸本)9783319573366;9783319573359

The extraction of ridge lines from digital elevation models is fundamental for generalizing digital elevation models (DEM), analyzing digital valleys, remote sensing analysis, and topographic indices analysis. In this paper, the authors propose a method to extract ridge lines from a gridded DEM called the Steepest Ascent Method Based on Constrained Direction (SAMBCD). In the SAMBCD method, based on the overland flow simulation method and the steepest ascent method, the authors define control points and constrain the direction of connecting points in the process of organizing major ridge lines and minor ridge lines, respectively, among the discrete points of the catchment boundary. Specifically, with SAMBCD, the points on hill peaks and saddle points are first sorted and used as control points to constrain the connecting direction. Second, the major ridge lines are organized by connecting the relevant discrete points of the catchment boundary, following the constrained direction. Finally, the remaining discrete points of the catchment boundary are connected to form the minor ridge lines with the same constrained connecting direction. Many tests are performed to extract ridge lines in different regions. The results show that the method of SAMBCD is effective for decreasing the fracture, cross and rotation of extracted ridge lines. Moreover, SAMBCD has better performance in the continuity and integrity of ridge lines than the two basic methods mentioned above.

关键词： Grid DEM Ridge lines Constrained connecting direction Overland flow simulation Steepest ascent method

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Gamification as Motivation to Engage in Location-Based Public Participation? 13th

Gamification as Motivation to Engage in Location-Based Publi...

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13th Location-Based Services (LBS) Conference

作者： Thiel, Sarah-Kristin Froehlich, Peter AIT Austrian Inst Technol GmbH Innovat Syst Dept Giefinggasse 2 A-1210 Vienna Austria

ISBN: (纸本)9783319472898;9783319472881

In the last decade there have been various attempts to foster location-based public participation. Researchers as well as municipalities have explored several methods, among them the implementation of digital participation tools. However, the actual level of participation has remained low. This gives cause to both analyze the reasons for the ineffectiveness of the explored methods as well as to "think outside the box" and try novel approaches. One of such approaches is gamification. This research investigates the effects adding game-inspired elements can have on participation. In particular, we focus on how motivational factors differ for gamified participation and whether motivations influence citizens' level of engagement. To do so, we conducted an experiment with a location-based mobile participation prototype. Our results suggest that participation in a gamified application was higher than in one without, but also decreased intrinsic motivation, which was found to influence activity in location-based public participation. The strongest reported motivation was reporting issues regarding urban topics and stating one's opinion.

关键词： Gamification Motivation Public participation Location-based

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Multimodal Location Based Services-Semantic 3D City Data as Virtual and Augmented Reality 13th

Multimodal Location Based Services-Semantic 3D City Data as ...

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13th Location-Based Services (LBS) Conference

作者： Miguel Santana, Jose Wendel, Jochen Trujillo, Agustin Pablo Suarez, Jose Simons, Alexander Koch, Andreas Univ Las Palmas Gran Canaria Las Palmas De GC Spain EIFER Karlsruhe Germany

ISBN: (纸本)9783319472898;9783319472881

The visualization of cross-domain spatial data sets has become an important task within the analysis of energy models. The representation of these models is especially important in urban areas, in which the under-standing of patterns of energy production and demand is key for an efficient city planning. Location Based Services (LBS) provide a valuable addition towards the analysis and visualization of those data sets as the user can explore the output of different models and simulations in the real environment at the location of interest. Towards this aim, the present research explores mobile alternatives to the visual analysis of temporal data series and 3D building models. Based on the fields of numerical simulation, GIS and computer graphics, this work presents a novel mobile service that allows exploring urban models at different Level of Details (LoDs) using well-known standards such as CityGML. Ultimately, the project enables researchers, city planners and technicians to explore urban energy datasets in an interactive and immersive manner as Virtual Globes, Virtual Reality and Augmented Reality. Using models of the city of Karlsruhe, the final service has been implemented and tested on the iOS platform providing an empirical insight on the performance of the system. In addition, this research provides a holistic approach by developing one application that is capable of seamlessly change the visualization mode.

关键词： Augmented reality Virtual reality CityGML energy data Multimodal visualization GIS Temporal datasets rendering

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Connecting the Dots: Informing Location-Based Services of Space Usage Rules 13th

Connecting the Dots: Informing Location-Based Services of Sp...

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13th Location-Based Services (LBS) Conference

作者： Samsonov, Pavel Andreevich Hasselt Univ tUL iMinds Expertise Ctr Digital Media Hasselt Belgium

ISBN: (纸本)9783319472898;9783319472881

Today, a large set of location-based services exists and millions of people use these applications on a daily base. These services are capable of fulfilling and assisting with a variety of tasks, such as fetching points of interest or indicating friends nearby, performing web search requests, which respect the context of the user, or navigating to a destination point. Even though these are very helpful tools, most LBS perform simplistic 'point-to-point' queries. In this paper, we propose to extend the query types of current LBS and show how these also extend their potentials. We explain, why the absence of additional query types is an issue in certain cases, and summarize the work accomplished in this area. In addition, we concentrate on one usage domain which is missing in the majority of current LBS-information about space usage rules, e.g. 'no smoking in the restaurant' or 'no dogs allowed in this park' and illustrate these with various examples.

关键词： Location-based services Context-aware services Mobile spatial applications Space usage rules

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Increasing the Density of Local Landmarks in Wayfinding Instructions for the Visually Impaired 13th

Increasing the Density of Local Landmarks in Wayfinding Inst...

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13th Location-Based Services (LBS) Conference

作者： Padmanaban, Rajchandar Krukar, Jakub Univ Munster Inst Geoinformat Munster Germany

ISBN: (纸本)9783319472898;9783319472881

Multiple approaches to support non-visual navigation have been proposed, of which traditional auditory turn-by-turn navigational systems achieved high popularity. Despite being modified according to the needs of visually impaired users, the underlying dataset communicated to the wayfinder is sourced primarily from traditional POI databases which are of limited use to blind navigators. This work proposes the use of environmental features spontaneously detected by blind navigators during their everyday locomotion as 'local landmarks' for enriching auditory navigational instructions. We report results of a survey which served to identify such environmental features. Consequently, we propose a list of potential local landmarks for the blind. Next, in a usability study, we demonstrate that enriching traditional turn-by-turn auditory instructions with local landmarks can improve the subjective satisfaction and confidence in navigation. Results indicate that the improvements seem to be achieved even without increasing the subjective complexity of the instructions. Finally we discuss how using local landmarks to enrich auditory navigational instructions can benefit visually impaired users.

关键词： Local landmarks Wayfinding Visually impaired

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Residential Choices as a Driving Force to Vertical Segregation in Whitechapel 20th

Residential Choices as a Driving Force to Vertical Segregati...

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20th Conference on Geographic Information Science of the Association-of-Geographic-Information-Libraries-in-Europe (AGILE)

作者： Flint, Shlomit UCL Ctr Adv Spatial Anal London England

ISBN: (纸本)9783319567594;9783319567587

This study examines the impact of habitat choices and householder migration on Interbuilding Vertical segregation in Whitechapel, a diverse inner-city neighbourhood in London. For migrants living in this absorption area, the need for a sense of belonging and continuity leads to the development of micro mechanism that improve the individuals' ability to cope with the urban challenges. Based on residential records at the resolution of single families and flats that cover a period of 17 years, the study reveal and analyse powerful mechanism of residential segregation at the vertical dimension of buildings, which the dwellers are recognise, adjust to and obey. Taken together, this mechanism is a candidate for explaining the dynamics of residential segregation in Whitechapel during 1995-2012.

关键词： Spatiotemporal data acquisition Modelling Analysis Volunteered geographic information Community observatories

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