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Keywords = Symbology Encoding

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24 pages, 5653 KB  
Article
A Formalized 3D Geovisualization Illustrated to Selectivity Purpose of Virtual 3D City Model
by Romain Neuville, Jacynthe Pouliot, Florent Poux, Laurent De Rudder and Roland Billen
ISPRS Int. J. Geo-Inf. 2018, 7(5), 194; https://doi.org/10.3390/ijgi7050194 - 18 May 2018
Cited by 26 | Viewed by 7028
Abstract
Virtual 3D city models act as valuable central information hubs supporting many aspects of cities, from management to planning and simulation. However, we noted that 3D city models are still underexploited and believe that this is partly due to inefficient visual communication channels [...] Read more.
Virtual 3D city models act as valuable central information hubs supporting many aspects of cities, from management to planning and simulation. However, we noted that 3D city models are still underexploited and believe that this is partly due to inefficient visual communication channels across 3D model producers and the end-user. With the development of a formalized 3D geovisualization approach, this paper aims to support and make the visual identification and recognition of specific objects in the 3D models more efficient and useful. The foundation of the proposed solution is a knowledge network of the visualization of 3D geospatial data that gathers and links mapping and rendering techniques. To formalize this knowledge base and make it usable as a decision-making system for the selection of styles, second-order logic is used. It provides a first set of efficient graphic design guidelines, avoiding the creation of graphical conflicts and thus improving visual communication. An interactive tool is implemented and lays the foundation for a suitable solution for assisting the visualization process of 3D geospatial models within CAD and GIS-oriented software. Ultimately, we propose an extension to OGC Symbology Encoding in order to provide suitable graphic design guidelines to web mapping services. Full article
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17 pages, 590 KB  
Article
Communicating Thematic Data Quality with Web Map Services
by Jon D. Blower, Joan Masó, Daniel Díaz, Charles J. Roberts, Guy H. Griffiths, Jane P. Lewis, Xiaoyu Yang and Xavier Pons
ISPRS Int. J. Geo-Inf. 2015, 4(4), 1965-1981; https://doi.org/10.3390/ijgi4041965 - 6 Oct 2015
Cited by 5 | Viewed by 7796
Abstract
Geospatial information of many kinds, from topographic maps to scientific data, is increasingly being made available through web mapping services. These allow georeferenced map images to be served from data stores and displayed in websites and geographic information systems, where they can be [...] Read more.
Geospatial information of many kinds, from topographic maps to scientific data, is increasingly being made available through web mapping services. These allow georeferenced map images to be served from data stores and displayed in websites and geographic information systems, where they can be integrated with other geographic information. The Open Geospatial Consortium’s Web Map Service (WMS) standard has been widely adopted in diverse communities for sharing data in this way. However, current services typically provide little or no information about the quality or accuracy of the data they serve. In this paper we will describe the design and implementation of a new “quality-enabled” profile of WMS, which we call “WMS-Q”. This describes how information about data quality can be transmitted to the user through WMS. Such information can exist at many levels, from entire datasets to individual measurements, and includes the many different ways in which data uncertainty can be expressed. We also describe proposed extensions to the Symbology Encoding specification, which include provision for visualizing uncertainty in raster data in a number of different ways, including contours, shading and bivariate colour maps. We shall also describe new open-source implementations of the new specifications, which include both clients and servers. Full article
(This article belongs to the Special Issue Open Geospatial Science and Applications)
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