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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341-350 订阅

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Crowdsourcing Mapping and Participatory Planning Support System: Case Study of Brno, Czechia 28th

Crowdsourcing Mapping and Participatory Planning Support Sys...

引用

28th International Cartographic Conference (ICC)

作者： Panek, Jiri Paszto, Vit Palacky Univ Olomouc Dept Dev Studies Olomouc Czech Republic Palacky Univ Olomouc Dept Geoinformat Olomouc Czech Republic

ISBN: (纸本)9783319573366;9783319573359

Many cities have started to engage their citizens in collaborative planning and in re-creating the urban spaces where they live. The case study presented in this paper crowdsourced subjective/emotional responses concerning the environment of the city of Brno in the Czech Republic, from 2,087 respondents, who marked 24,065 points on six different topics and added over 3,000 further comments. The paper presents not only the case study, but also the authors' own web-application called Emotional Maps-built for crowdsourcing spatial data, mainly about city development and subjective perceptions of urban spaces. The collected data showed three main hot-spots in the city, with a significant number of marked points reported by citizens. The paper comments on the reasons these spots are important for the citizens of Brno and their suggestions for future activities there. Furthermore, the authors argue that ad hoc flexible web-mapping platforms such as the one presented in the paper can be an asset to city administrations as well as urban planners.

关键词： Emotional mapping Urban planning Perceptions Neocartography

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Open Source First Person View 3D Point Cloud Visualizer for Large Data Sets

Open Source First Person View 3D Point Cloud Visualizer for ...

引用

GIS Symposium on the Rise of Big Spatial Data

作者： Palha, Arnaud Murtiyoso, Arnadi Michelin, Jean-Christophe Alby, Emmanuel Grussenmeyer, Pierre INSA Photogrammetry & Geomat Grp ICube Lab UMR 7357 Strasbourg France SNCF Reseau 6 Ave Francois Mitterrand F-93574 St Denis Reunion France

ISBN: (纸本)9783319451237;9783319451220

The use of laser scanning techniques has become a common way to measure the real world. Millions of points could be generated by this system, which brings forth the problem of visualizing and eventually performing analyses on them. In the open source domain, various software packages exist to visualize 3D point clouds. However, most of these software packages do not allow the real-time rendering of large point clouds. Few of them also allow visualization in an immersive manner. The research aims to create an open source viewer for large 3D point clouds, which enables a dynamic and immersive visualization. In order to do so, rendering and point cloud management strategies must be implemented to avoid overloading the computer's memory. The rendering is done using OpenGL engine by utilizing the graphic card's memory in order to perform faster visualization. The program consists of a pre-processing stage in which the point cloud files are divided into quadtrees and then subsampled using the random tree sampling method. The visualization itself will calculate the distance between the point of view and the center of nodes generated by the pre-processing stage. The amount of points rendered within each node will depend on this distance;the farther away the node is from the point of view, the fewer points are rendered. A loading and unloading function enables the point cloud to be rendered dynamically. With the point cloud management algorithm implemented, the resulting program is able to load large point clouds generated by a mobile laser scanner using an ordinary computer. The resulting program as well as the source code will be available for the public due to its open source nature.

关键词： Visualization Large point cloud Immersive Quadtree Random tree sampling

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Rethinking the Buffering Approach for Assessing OpenStreetMap Positional Accuracy 28th

Rethinking the Buffering Approach for Assessing OpenStreetMa...

引用

28th International Cartographic Conference (ICC)

作者： Zhou, Qi China Univ Geosci Sch Informat Engn Wuhan Hubei Peoples R China

ISBN: (纸本)9783319573366;9783319573359

OpenStreetMap (OSM) is a free source of spatial data based on crowd-sourcing. Although OSM data are widely used in applications such as the generation of 3D models, routing and navigation, the quality issue is still one of the significant concerns when using these data. Extensive studies have focused on assessing the quality, especially the positional accuracy, of OSM data. One method for assessing accuracy is the buffering approach where a buffer is created around a validated road network using a predefined buffer radius. The percentage of OSM road lengths that lie within this buffer is then calculated. While existing studies have used the buffering approach, the method itself has not been evaluated either theoretically and experimentally. It is found that the percentage of OSM road length calculated based on the buffering approach may be imprecise if the validated road network and the OSM road network are not matched one-to-one. Therefore, this study suggests that it is necessary to first match the OSM road network with the validated road network before using the buffering approach.

关键词： OpenStreetMap Quality assessment Positional accuracy Buffering approach

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The Apprehension of Overlaid Information in a Web Map 28th

The Apprehension of Overlaid Information in a Web Map

引用

28th International Cartographic Conference (ICC)

作者： Dumpor, Dzenan Midtbo, Terje Norwegian Univ Sci & Technol Trondheim Norway

ISBN: (纸本)9783319573366;9783319573359

Map mashups are now common when presenting information in digital media. This paper explores the relation between the background information (basemap) and the information that is displayed over the basemap. Will the user be disturbed by the background when solving tasks related to the overlaid information? To answer this and other questions, a web-based experiment was prepared. The participants in the experiment were introduced to different tasks based on combinations of data primitives in the top layer. Three different basemaps were tested. In a focused part of the experiment, tasks related to the combination of area and points in the top layer were explored more closely. The experiment indicated that the tasks related to different coloured areas in combination with points of different colours were more time consuming to solve on a topographic map with many details.

关键词： Web maps Basemap Web experiment

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Psychogeography in the Age of the Quantified Self-Mental Map Modelling with Georeferenced Personal Activity Data 28th

Psychogeography in the Age of the Quantified Self-Mental Map...

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28th International Cartographic Conference (ICC)

作者： Meier, Sebastian Glinka, Katrin Univ Appl Sci Interact Design Lab Potsdam Germany Univ Appl Sci Urban Complex Lab Potsdam Germany

ISBN: (纸本)9783319573366;9783319573359

Personal and subjective perceptions of urban space have been a focus of various research projects in the area of cartography, geography, and related fields such as urban planning. This paper illustrates how personal georeferenced activity data can be used in algorithmic modelling of certain aspects of mental maps and customised spatial visualisations. The technical implementation of the algorithm is accompanied by a preliminary study which evaluates the performance of the algorithm. As a linking element between personal perception, interpretation, and depiction of space and the field of cartography and geography, we include perspectives from artistic practice and cultural theory.

关键词： Mental maps Location-based services Activity data Spatial analysis Spatial behaviour

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Introducing Leader Lines into Scale-Aware Consistent Labeling 28th

Introducing Leader Lines into Scale-Aware Consistent Labelin...

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28th International Cartographic Conference (ICC)

作者： Wu, Hsiang-Yun Takahashi, Shigeo Poon, Sheung-Hung Arikawa, Masatoshi Keio Univ Yokohama Kanagawa Japan Univ Aizu Aizu Wakamatsu Japan Univ Teknol Brunei Gadong Brunei Univ Tokyo Tokyo Japan

ISBN: (纸本)9783319573366;9783319573359

Consistently placing annotation labels across map scales often poses a problem due to the restriction of the screen space. This problem becomes further exacerbated when we navigate by arbitrarily zooming in and out of digital maps on mobile devices. In this paper, we introduce leader lines to conventional techniques for scale-aware consistent labeling to accommodate more annotation labels on the map domain while retaining their plausible arrangement. The overall visibility of annotation labels is optimized using genetic algorithms while avoiding their unwanted popping effects and sudden leaps regardless of the change in the map scale. The feasibility of the proposed approach is demonstrated by experimental results including comparison with relevant techniques.

关键词： Active range optimization Dynamic labeling Leader lines Genetic algorithms

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Mapping Community Vulnerability to Poaching: A Whole-of-Society Approach 28th

Mapping Community Vulnerability to Poaching: A Whole-of-Soci...

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28th International Cartographic Conference (ICC)

作者： Schmitz, Peter M. U. Goncalves, Duarte Jacobs, Merin CSIR Built Environm Meiring Naude Rd Pretoria South Africa Univ Pretoria Dept Geog Geoinformat & Meteorol Lynnwood Rd Pretoria South Africa Hsch Tech Fak Vermessung Informat & Math Schellingstr 24 D-70174 Stuttgart Germany CSIR Def Peace Safety & Secur Meiring Naude Rd Pretoria South Africa

ISBN: (纸本)9783319573366;9783319573359

Wildlife crime, especially rhinoceros poaching, is a major problem in South Africa. Approaches to reduce wildlife crime in South Africa range from very sophisticated, near-military interventions to engaging with nearby communities. A method investigated here is the use of a whole-of-society approach. This paper investigates the community analysis part of the whole-of-society approach that was used to reduce levels of wildlife crime. Indicators of vulnerability are discussed based on research conducted by several authors and selected on the basis that data can be obtained from generally available sources such as the census. Indicators linked with high levels of risk are identified for communities next to game parks. The goal is to reduce the vulnerability of individuals in these communities to be coerced into wildlife crime by criminal syndicates.

关键词： Wildlife crime Indicators Whole-of-society Communities Game parks

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Situation Goodness Method for Weighted Centroid-Based Wi-Fi APs Localization 13th

Situation Goodness Method for Weighted Centroid-Based Wi-Fi ...

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13th Location-Based Services (LBS) Conference

作者： Mendoza-Silva, German M. Torres-Sospedra, Joaquin Huerta, Joaquin Montoliu, Raul Benitez, Fernando Belmonte, Oscar Univ Jaume 1 Inst New Imaging Technol Avda Vicente Sos Baynat S-N Castellon De La Plana 12071 Spain

ISBN: (纸本)9783319472898;9783319472881

Knowing the location of Wi-Fi antennas may be critical for indoor localization. However, in a real environment, their positions may be unknown since they can be managed by external entities. This paper introduces a new method for evaluating the suitability of using the weighted centroid method for the 2D localization of a Wi-Fi AP. The method is based on the idea that the weighted centroid method provides its best results when there are fingerprints taken around the AP. In order to find the probability of being in the presence of such situations, a natural neighbor interpolation method is used to find the regions with the highest signal strengths. A geometrical method is then used to characterize that probability based on the distribution of those regions in relation to the AP position estimation given by the weighted centroid method. The paper describes the testing location and the used Wi-Fi fingerprints database. That database is used to create new databases that recreate different sampling possibilities through a samples deletion strategy. The original database and the newly created ones are then used to evaluate the localization results of several AP localization methods and the new method proposed in this paper. The evaluation results have shown that the proposed method is able to provide a proper probability for the suitability of using the weighted centroid method for localizing a Wi-Fi AP.

关键词： Indoor localization Wi-Fi aps localization Weighted centroid Interpolation LBS

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Accessibility in Pedestrian Routing 28th

Accessibility in Pedestrian Routing

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28th International Cartographic Conference (ICC)

作者： Brittell, Megen Grummon, Christine Lobben, Amy Omri, Masrudy Perdue, Nicholas Univ Oregon Eugene OR 97403 USA Humboldt State Univ Arcata CA 95521 USA

ISBN: (纸本)9783319573366;9783319573359

Pedestrian route planning presents unique challenges compared to relatively well established car routing applications. The challenges are even more pronounced when also considering a diverse user group, which includes people with disabilities. Existing research has identified environmental features that are important to pedestrians with disabilities, but there are still a number of outstanding problems that have hindered the development of a widespread, usable solution. We developed the EUG Access web application (http://***/geocog/eugaccess) to implement an approach to pedestrian routing that incorporates environmental accessibility and responds to the needs and preferences of a diverse user population. This paper reviews related literature and reports our experience through three phases of development: personalization, route calculation, and interface design. It concludes by drawing attention to issues that we propose are critical to successfully incorporating environmental accessibility into future pedestrian routing applications.

关键词： Human centered computing Accessibility systems Routing systems Geographic information systems

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20 Years of AGILE 20th

20 Years of AGILE

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

作者： Pundt, Hardy Toppen, Fred Harz Univ Appl Sci Wernigerode Germany Univ Utrecht Fac Geosci Utrecht Netherlands

ISBN: (纸本)9783319567594;9783319567587

Preceded by a 'personal word' from the authors, the focus of this paper is on a number of facts and activities that together describe how AGILE developed from an idea in the garden of the late Peter Burrough in Wageningen in July 1997 to a mature and well known organization nowadays. After a short description of those very first years where the reason for existence was discussed that resulted in the AGILE mission, the structure of AGILE as an organization is presented. How the mission was translated into a range of activities is described in a number of paragraphs, where the AGILE working groups, initiatives, the participation in EU projects and conference themes are discussed. The paper will finish with some personal impressions by those who acted as chairpersons of AGILE.

关键词： AGILE history GI science European co-operation

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