A Search Interface for an SDI: Implementation and Evaluation of Metadata Visualization Strategies

Aditya, Trias; Kraak, M.J.

doi:10.1111/j.1467-9671.2007.01053.x

Cited by 13 publications

(10 citation statements)

References 44 publications

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“…Enabling information models and geospatial information based on ISO/TC 211 and OGC standards in RDF and OWL can bring more value to the domain of GIS and other domains as well as the Semantic Web in general [23]. Semantic Web technologies can be used to improve discovery in SDIs [24][25][26][27][28][29]. Authoritative geospatial information can be combined with less structured geospatial information from crowdsourcing, citizen science and sensors [20,30], and Semantic Web concepts for reasoning may be used to derive new knowledge [31][32][33].…”

Section: Geospatial Information In the Semantic Webmentioning

confidence: 99%

Adapted Rules for UML Modelling of Geospatial Information for Model-Driven Implementation as OWL Ontologies

Jetlund

Onstein

Huang

2019

IJGI

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This study aims to improve the implementation of models of geospatial information in Web Ontology Language (OWL). Large amounts of geospatial information are maintained in Geographic Information Systems (GIS) based on models according to the Unified Modeling Language (UML) and standards from ISO/TC 211 and the Open Geospatial Consortium (OGC). Sharing models and geospatial information in the Semantic Web will increase the usability and value of models and information, as well as enable linking with spatial and non-spatial information from other domains. Methods for conversion from UML to OWL for basic concepts used in models of geospatial information have been studied and evaluated. Primary conversion challenges have been identified with specific attention to whether adapted rules for UML modelling could contribute to improved conversions. Results indicated that restrictions related to abstract classes, unions, compositions and code lists in UML are challenging in the Open World Assumption (OWA) on which OWL is based. Two conversion challenges are addressed by adding more semantics to UML models: global properties and reuse of external concepts. The proposed solution is formalized in a UML profile supported by rules and recommendations and demonstrated with a UML model based on the Intelligent Transport Systems (ITS) standard ISO 14825 Geographic Data Files (GDF). The scope of the resulting ontology will determine to what degree the restrictions shall be maintained in OWL, and different conversion methods are needed for different scopes.

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Section: Geospatial Information In the Semantic Webmentioning

confidence: 99%

Adapted Rules for UML Modelling of Geospatial Information for Model-Driven Implementation as OWL Ontologies

Jetlund

Onstein

Huang

2019

IJGI

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“…Several articles show the practical use of geospatial information on The Semantic Web. The three articles (Aditya and Kraak, 2007, Klien, 2007, Lutz and Kolas, 2007 describe the potential of The Semantic Web for discovery in SDIs. Geospatial information is accessed as linked data from WFS in (Hietanen, Lehto, and Latvala, 2016), while (van den Brink et al, 2014) and (Patroumpas et al, 2015) describe a transformation of both UML models and data in GML format to OWL and RDF.…”

Section: Literature Reviewmentioning

confidence: 99%

Improvements in Automated Derivation of Owl Ontologies From Geospatial Uml Models

Jetlund¹

2018

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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<p><strong>Abstract.</strong> Standards from ISO/TC 211 are the foundation for modelling a universe of discourse in a geospatial context. UML models based on the standards, and in particular based on the UML profile defined in ISO 19103, have been developed and implemented in applications and databases for a wide range of geospatial information, from international to national and agency level. Amounts of information has been collected, maintained and made available based on the models, but mainly through specific services and exchange formats for geospatial information. To make the models and the information available in The Semantic Web, the geospatial UML models need to be transformed from UML to OWL ontologies, and the information needs to be transformed from UML-based structures to RDF triples. This paper investigates methods for transforming UML models of geospatial information to OWL ontologies, identifies challenges, suggest improvements and identifies needs for further research. Several methods for automated transformation from geospatial UML models to OWL handle basic concepts, but some concepts and context-closed restrictions from UML cannot be directly transformed to the open world of The Semantic Web. None of the analysed methods handles all of these issues, and suggested improvements include combining and improving transformation rules, as well as modifications in the UML models. To what degree and how these issues need to be handled will depend on whether the scope of the ontologies is to simply present geospatial information on The Semantic Web, or if they shall be used in a bidirectional information exchange.</p>

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“…Tools are required to both present metadata and edit metadata [26]. These tools are able to produce human readable reports, e.g., in the form of HTML pages [27] using different strategies, XSLT being a popular choice for turning XML metadata document sources into human-readable HTML. Even though a human readable report is easily interpreted by an operator that is familiar with it, the work load to compare tens or hundreds of documents is impractical.…”

Section: Building On the Iso Modelmentioning

confidence: 99%

Communicating Thematic Data Quality with Web Map Services

Blower

Masó

Diaz

et al. 2015

IJGI

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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

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A Search Interface for an SDI: Implementation and Evaluation of Metadata Visualization Strategies

Cited by 13 publications

References 44 publications

Adapted Rules for UML Modelling of Geospatial Information for Model-Driven Implementation as OWL Ontologies

Adapted Rules for UML Modelling of Geospatial Information for Model-Driven Implementation as OWL Ontologies

Improvements in Automated Derivation of Owl Ontologies From Geospatial Uml Models

Communicating Thematic Data Quality with Web Map Services

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