====== Artigos ======
@article{Mello20061646,
title = "Using XML to improve the productivity and robustness in application development in geosciences (Najara)",
journal = "Computers & Geosciences",
volume = "32",
number = "10",
pages = "1646 - 1653",
year = "2006",
note = "",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2006.03.003",
url = "http://www.sciencedirect.com/science/article/B6V7D-4K427TM-1/2/9794f4bc2f1df6d766e202dc469f1722",
author = "Ulisses T. Mello and Liqing Xu",
keywords = "XML",
keywords = "C++ binding",
keywords = "Basin modeling",
keywords = "Ray-tracing",
keywords = "Application development",
abstract = "
In this paper, we describe an approach to apply Extensible Markup Language (XML) technologies to improve the robustness of geological and geophysical applications as well as to increase the efficacy in the application development process. Geological and geophysical applications are often data centric, I/O intensive and their development is incremental. Therefore, significant amount of development resources is devoted to the design and reengineering of the container data structures that store data. This process is time consuming, mechanical and error prone. Normally, ad hoc parsers are necessary for reading inputs, as well as numerous filters, or adapters to transform the data for integration with other legacy applications. Most of this can be avoided by using XML-related technologies. XML has a type system schema that can be used to define input parameters and constraints. The XML parser can validate the input data using the constraints defined in the schema. Exporting results in XML format allows the use of Extensible Stylesheet Language Transformations (XSLT) to transform XML output to any other format necessary for integration with legacy applications. Additionally, XML-data binding code can be automatically generated in specified languages such C++ and Java. We used this approach to develop applications for seismic ray-tracing and basin modeling with great success, and the major benefits of this approach were the significant gains in productivity during the developement and application robustness."
}
@article{MiriamBaglioni2008,
author={Miriam Baglioni, Emiliano Giovannetti Maria Vittoria Masserotti Chiara Renso Laura Spinsanti},
title={Ontology-supported Querying of Geographical Databases (Leila)},
journal={Transactions in GIS},
year={2008},
volume={12},
number={s1},
pages={31--44},
url={http://dx.doi.org/10.1111/j.146Chow7-9671.2008.01136.x},
abstract={Querying geographical information systems has been recognized as a difficult task for non-expert users. Furthermore, user queries are often characterized by semantic aspects not directly managed by traditional spatial databases or GIS. Examples of such semantic geospatial queries are the use of implicit spatial relations between objects, or the reference of domain concepts not explicitly represented in data. To handle such queries, we envisage a system that translates natural language queries into spatial SQL statements on a database, thus improving standard GIS with new semantic capabilities. Within this general objective, the contribution of this article is to introduce a methodology to handle semantic geospatial queries issued over a spatial database. This approach captures semantics from an ontology built upon the spatial database and enriched by domain concepts and properties specifically defined to represent the localization of objects. Some examples of the use of the methodology in the urban domain are presented.},
issn={1467-9671}
}
@article{Mansourian2006303,
title = "Using SDI and web-based system to facilitate disaster management (Newton)",
journal = "Computers & Geosciences",
volume = "32",
number = "3",
pages = "303 - 315",
year = "2006",
note = "",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2005.06.017",
url = "http://www.sciencedirect.com/science/article/B6V7D-4GXW93F-2/2/6302f02da0a299a8238cbfd87453a259",
author = "A. Mansourian and A. Rajabifard and M.J. Valadan Zoej and I. Williamson",
keywords = "Spatial data",
keywords = "SDI",
keywords = "Web-based system",
keywords = "Disaster management",
keywords = "Decision-making",
abstract = "
Spatial data and related technologies have proven to be crucial for effective collaborative decision-making in disaster management. However, there are currently substantial problems with availability, access and usage of reliable, up-to-date and accurate data for disaster management. This is a very important aspect to disaster response as timely, up-to-date and accurate spatial data describing the current situation is paramount to successfully responding to an emergency. This includes information about available resources, access to roads and damaged areas, required resources and required disaster response operations that should be available and accessible for use in a short period of time. Any problem or delay in data collection, access, usage and dissemination has negative impacts on the quality of decision-making and hence the quality of disaster response. Therefore, it is necessary to utilize appropriate frameworks and technologies to resolve current spatial data problems for disaster management.
This paper aims to address the role of Spatial Data Infrastructure (SDI) as a framework for the development of a web-based system as a tool for facilitating disaster management by resolving current problems with spatial data. It is argued that the design and implementation of an SDI model and consideration of SDI development factors and issues, together with development of a web-based GIS, can assist disaster management agencies to improve the quality of their decision-making and increase efficiency and effectiveness in all levels of disaster management activities.
The paper is based on an ongoing research project on the development of an SDI conceptual model and a prototype web-based system which can facilitate sharing, access and usage of spatial data in disaster management, particularly disaster response."
}
@article{Schindler20081947,
title = "Generic XML-based framework for metadata portals",
journal = "Computers & Geosciences",
volume = "34",
number = "12",
pages = "1947 - 1955",
year = "2008",
note = "",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2008.02.023",
url = "http://www.sciencedirect.com/science/article/B6V7D-4SF3052-1/2/f89e379a9b89daa85242f2f2c1068dcc",
author = "Uwe Schindler and Michael Diepenbroek",
keywords = "Spatial data infrastructure",
keywords = "Metadata portal",
keywords = "Metadata standard",
keywords = "Open archives",
keywords = "Full-text search",
keywords = "Apache Lucene",
abstract = "
We present a generic and flexible framework for building geoscientific metadata portals independent of content standards for metadata and protocols. Data can be harvested with commonly used protocols (e.g., Open Archives Initiative Protocol for Metadata Harvesting) and metadata standards like DIF or ISO 19115. The new Java-based portal software supports any XML encoding and makes metadata searchable through Apache Lucene. Software administrators are free to define searchable fields independent of their type using XPath. In addition, by extending the full-text search engine (FTS) Apache Lucene, we have significantly improved queries for numerical and date/time ranges by supplying a new trie-based algorithm, thus, enabling high-performance space/time retrievals in FTS-based geo portals. The harvested metadata are stored in separate indexes, which makes it possible to combine these into different portals. The portal-specific Java API and web service interface is highly flexible and supports custom front-ends for users, provides automatic query completion (AJAX), and dynamic visualization with conventional mapping tools. The software has been made freely available through the open source concept."
}
@article{Youn20081936,
title = "Web-based simulating system for modeling earthquake seismic wavefields on the grid",
journal = "Computers & Geosciences",
volume = "34",
number = "12",
pages = "1936 - 1946",
year = "2008",
note = "",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2008.02.028",
url = "http://www.sciencedirect.com/science/article/B6V7D-4T1Y3TG-1/2/32a1b241a4284a2fb878e8a24be1e877",
author = "Choonhan Youn and Tim Kaiser and Dogan Seber and Cindy Santini",
keywords = "Web services",
keywords = "Grid computing",
keywords = "Earthquake modeling",
keywords = "Simulation",
abstract = "
We have developed the SYNSEIS (SYNthetic SEISmogram) tool within the GEON (GEOscience Network) project to enable efficient computations of synthetic seismic waveforms for research and education. SYNSEIS is built as a distributed system to support the calculation of synthetic seismograms in 2D/3D media. The underlying simulation software is a finite difference code, E3D, developed by LLNL (S. Larsen). This code is embedded within the SYNSEIS environment and used by our SYNSEIS tool to simulate seismic waveforms of either earthquakes or explosions at regional distances (<1000 km). The SYNSEIS architecture is based around a Web service model. Especially, the computing Web services seamlessly access Grid computing resources by hiding the complexity of grid technologies. Even though the Grid computing is well-established in many computing communities, its use among domain scientists still is not trivial because of multiple levels of complexities encountered. We have also developed the grid-enabling E3D application code which takes our own dialect XML inputs that include geological models that are accessible through standard Web services. Also, the XML inputs for this application code contain structural geometries, source parameters, seismic velocity, density, attenuation values, number of time steps to compute, and number of stations.
In this paper, we emphasize the development of a state-of-the-art web-based scientific computational environment. Our system can be used to promote an efficient and effective modeling environment to help scientists as well as educators in their daily activities and speed up the scientific discovery process."
}
@article{Athanasis2009301,
title = "Towards a semantics-based approach in the development of geographic portals",
journal = "Computers & Geosciences",
volume = "35",
number = "2",
pages = "301 - 308",
year = "2009",
note = "",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2008.01.014",
url = "http://www.sciencedirect.com/science/article/B6V7D-4STGRW2-1/2/c2f26eb0a58643879270c9a2c85fd616",
author = "Nikolaos Athanasis and Kostas Kalabokidis and Michail Vaitis and Nikolaos Soulakellis",
keywords = "Geoportal",
keywords = "Semantic web",
keywords = "RDF",
keywords = "Metadata",
keywords = "Navigation",
abstract = "
As the demand for geospatial data increases, the lack of efficient ways to find suitable information becomes critical. In this paper, a new methodology for knowledge discovery in geographic portals is presented. Based on the Semantic Web, our approach exploits the Resource Description Framework (RDF) in order to describe the geoportal's information with ontology-based metadata. When users traverse from page to page in the portal, they take advantage of the metadata infrastructure to navigate easily through data of interest. New metadata descriptions are published in the geoportal according to the RDF schemas."
}
@article{Antoniou2006184,
title = "The potential of XML encoding in geomatics converting raster images to XML and SVG (Irving)",
journal = "Computers & Geosciences",
volume = "32",
number = "2",
pages = "184 - 194",
year = "2006",
note = "",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2005.06.004",
url = "http://www.sciencedirect.com/science/article/B6V7D-4GPW6J7-1/2/c4ac29e5ea3ba7a120ccf04d1d58ee4a",
author = "Byron Antoniou and Lysandros Tsoulos",
keywords = "Open standards",
keywords = "Raster image encoding",
keywords = "Classification",
abstract = "
The evolution of open standards and especially those pertaining to the family of XML technologies, have a considerable impact on the way the Geomatics community addresses the acquisition, storage, analysis and display of spatial data. The most recent version of the GML specification enables the merging of vector and raster data into a single "open" format. The notion of "coverage" as described in GML 3.0 can be the equivalent of a raster multi-band dataset. In addition, vector data storage is also described in detail through the GML Schemas and XML itself can store the values of a raster dataset, as values of a multi-table dataset. Under these circumstances an issue that must be addressed is the transformation of raster data into XML format and their subsequent visualization through SVG. The objective of this paper is to give an overview of the steps that can be followed in order to embody open standards and XML technologies in the raster domain. The last part of the work refers to a case study that suggests a step by step methodology to accomplish classification, an important function in Cartography and Remote Sensing, using the XML-encoded images."
}
@article{Yue2007649,
title = "Semantics-based automatic composition of geospatial Web service chains",
journal = "Computers & Geosciences",
volume = "33",
number = "5",
pages = "649 - 665",
year = "2007",
note = "",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2006.09.003",
url = "http://www.sciencedirect.com/science/article/B6V7D-4MY0TX9-4/2/149c5e41b8786528d1bc71c926bfe58a",
author = "Peng Yue and Liping Di and Wenli Yang and Genong Yu and Peisheng Zhao",
keywords = "Geospatial Web service",
keywords = "Service-oriented architecture (SOA)",
keywords = "Ontology",
keywords = "Semantic Web",
keywords = "Service composition",
keywords = "Service chaining",
abstract = "
Recent developments in Web service technologies and the semantic Web have shown promise for automatic discovery, access, and use of Web services to quickly and efficiently solve particular application problems. One such application area is in the geospatial discipline, where Web services can significantly reduce the data volume and required computing resources at the end-user side. A key challenge in promoting widespread use of Web services in the geospatial applications is to automate the construction of a chain or process flow that involves multiple services and highly diversified and distributed data. This work presents an approach for automating geospatial Web service composition by employing geospatial semantics in the service-oriented architecture (SOA). It shows how ontology-based geospatial semantics are used in a prototype system for enabling the automatic discovery, access, and chaining of geospatial Web services. A case study of the chaining process for deriving a landslide susceptibility index illustrates the applicability of ontology-driven automatic Web service composition for geospatial applications."
}
@article{Kruger2007739,
title = "AHPSVER: A web-based system for hydrologic forecast verification",
journal = "Computers & Geosciences",
volume = "33",
number = "6",
pages = "739 - 748",
year = "2007",
note = "",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2006.10.005",
url = "http://www.sciencedirect.com/science/article/B6V7D-4MWGFG0-1/2/d3196590d416f7ac3993ea5d6cfb0b76",
author = "Anton Kruger and Shashank G. Khandelwal and Allen Bradley",
keywords = "Hydrologic model verification",
keywords = "Relational database",
keywords = "Dynamic website",
abstract = "
Hydrologic forecast verification is a complicated endeavor due to the size and multi-dimensionality of the data sets involved. Finding an effective way to examine and interpret these data sets in ways that are meaningful to forecasters and forecast users is a central challenge in determining how good the forecasts are. We have developed the (AHPSVER) system to address these issues. The AHPSVER system consists of two components. The first is a comprehensive archive of verification data. The second component is a fully dynamic, relational database back-ended website that allows users to view the verification data in individual, customized ways. The system uses a maps- and forms-based interface to make interaction with users easy. The system outputs several types of graphs complemented with context-sensitive help. These graphs are pre-computed when possible (saving time and computation resources) and otherwise generated by the system on demand. These allow geographically diverse users to conduct individual, customized, and interactive analyses of the forecast verification data set."
}
@article{Jean-PierreBardet2009,
author={Jean-Pierre Bardet, Amir Zand},
title={Spatial Modeling of Geotechnical Information Using GML},
journal={Transactions in GIS},
year={2009},
volume={13},
number={1},
pages={125--165},
url={http://dx.doi.org/10.1111/j.1467-9671.2008.01139.x},
abstract={Geotechnical data characterizes the geometry and physical properties of soil deposits, which are determined from field observations, in-situ and laboratory tests, and engineering analyses. Until now, geotechnical information was mainly described and exchanged as relational data, which occasionally included spatial characteristics. Hereafter, the spatial features of geotechnical data are investigated by invoking the geotechnical data model of the Association of Geotechnical and Geoenvironmental Specialists (AGS), which is widely used in the United Kingdom to exchange geotechnical data in engineering practice. The basic geometric objects in AGS geotechnical data are first identified. These geometric objects are mapped to basic geometric features of the Geography Markup Language (GML). AGS data can therefore be fully rendered using GML-conformant schemas, which make geotechnical data readily importable into GML-aware applications. The data can be also imported to mainstream GIS applications using Extensible Markup Language (XML) transformations. This article demonstrates the rendition of AGS data format to a GML-conformant schema and illustrates the implementation of the new format through a few geotechnical examples.},
issn={1467-9671}
}
@article{
title = "Real-time visualization in operational hydrology through web-based cartography",
author = "Christophe Lienert, Rolf Weingartner and Lorenz Hurni",
journal = "Cartography and Geographic Information Science",
volume = "36",
number = "1",
year = "2009",
pages = "45-59"
}
@article{TEdwinChow2008,
author={T Edwin Chow,},
title={The Potential of Maps APIs for Internet GIS Applications (Bruno},
journal={Transactions in GIS},
year={2008},
volume={12},
number={2},
pages={179--191},
url={http://dx.doi.org/10.1111/j.1467-9671.2008.01094.x},
abstract={Since the launching of Maps Application Programming Interfaces (APIs) in 2005, many web developers, including geographers and non-geographers, applauded the freely adaptable tools and used them to spawn numerous Internet applications. The success of the Maps APIs is largely attributable to its no-cost policy, the availability of global data coverage, dynamic navigation, query capability, and ease of implementation. Despite its versatility in dynamic exploration of geographic data online, the existing Maps APIs lack Geographic Information System (GIS) functionalities compared to other Internet Mapping Services. The goal of this research was to review the potential of the Maps APIs for Internet GIS applications. This research employed the Google Maps API and developed a web prototype that disseminates spatial information of urban sprawl in Mundy Township, Michigan. The results revealed that both vector and raster data could be effectively represented by using the Maps API. Moreover, the Geographic Markup Language (GML) approach illustrated great potential for developing Internet GIS solutions around open specifications. This research suggested several potential solutions to expand the spectrum of GIS operations of the Maps APIs by incorporating the XML-related technology and extending the JavaScript library.},
issn={1467-9671}
}
@article{
title = "Architecture design and prototyping of a Web-based, synchronous collaborative 3d GIS",
author = "Chang, Zheng,Eric ; Li, Songnian",
journal = "Cartography and Geographic Information Science",
volume = "35",
number = "2",
year = "2008",
pages = "117-132"
}
@article{KristinStock2008,
author={Kristin Stock,},
title={Determining Semantic Similarity of Behaviour Using Natural Semantic Metalanguage to Match User Objectives to Available Web Services},
journal={Transactions in GIS},
year={2008},
volume={12},
number={6},
pages={733--755},
url={http://dx.doi.org/10.1111/j.1467-9671.2008.01128.x},
abstract={Natural Semantic Metalanguage specifies a set of semantic primitives identified by linguists since the 1970s as being present in all analysed languages and not capable of further reduction. In this article, the 63 semantic primitives are used to define the semantics of user objectives and web services in the form of semantic explications, which are then compared to determine whether the web services are likely to be helpful in meeting the user objective. The comparison of the user objectives and web services is a two stage process. Firstly, the content is compared by classifying the semantic primitives from the candidate web service and user objective on the basis of whether the primitives are common or similar. On the basis of these classifications, the percentage match and semantic relationship (subset, superset, overlaps, disjoint, identical) are determined. Secondly, the order of the semantic primitives is compared and the edit distance determined as a measure of semantic similarity. The method is tested using two examples: a comparison of spatial relations and a comparison of a user objective and three geospatial web services. The results show that the method is able to determine which concepts are broadly semantically similar and which are not.},
issn={1467-9671}
}
@article{Sabou2007142,
title = "Towards semantically enhanced Web service repositories",
journal = "Web Semantics: Science, Services and Agents on the World Wide Web",
volume = "5",
number = "2",
pages = "142 - 150",
year = "2007",
note = "Software Engineering and the Semantic Web",
issn = "1570-8268",
doi = "DOI: 10.1016/j.websem.2006.11.004",
url = "http://www.sciencedirect.com/science/article/B758F-4MVVSS0-3/2/e0275bd419d4baa6a9253223cb773454",
author = "Marta Sabou and Jeff Pan",
keywords = "Web services repositories",
keywords = "Semantic Web",
keywords = "Ontology learning",
keywords = "Ontology mapping",
keywords = "Reasoning",
keywords = "Metadata presentation",
abstract = "
The success of the Web services technology has brought topics as software reuse and discovery once again on the agenda of software engineers. While there are several efforts towards automating Web service discovery and composition, many developers still search for services via online Web service repositories and then combine them manually. However, from our analysis of these online repositories, it yields that, unlike traditional software libraries, they rely on little metadata to support service discovery. We believe that the major cause is the difficulty of automatically deriving metadata that would describe rapidly changing Web service collections. In this paper, we discuss the major shortcomings of state of the art Web service repositories and as a solution, we report on ongoing work and ideas on how to use techniques developed in the context of the Semantic Web (ontology learning, matching, metadata based presentation) to improve the current situation."
}
@article{Zhao2009798,
title = "Semantic Web-based geospatial knowledge transformation",
journal = "Computers & Geosciences",
volume = "35",
number = "4",
pages = "798 - 808",
year = "2009",
note = "Geoscience Knowledge Representation in Cyberinfrastructure",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2008.03.013",
url = "http://www.sciencedirect.com/science/article/B6V7D-4TRK0PJ-1/2/6f37e08b483aa6aa13843af0ea55d789",
author = "Peisheng Zhao and Liping Di and Genong Yu and Peng Yue and Yaxing Wei and Wenli Yang",
keywords = "Ontology",
keywords = "Web service",
keywords = "Service chain",
keywords = "Scientific workflow",
abstract = "
Earth and space science research and applications typically involve collecting and analyzing large volumes of geospatial data much of which is derived from other existing data by applying a scientific workflow. Such a step-by-step process can be viewed as a process of geospatial knowledge transformation, which often involves hypotheses, inferences and integrations to derive user-specific data products from the knowledge of domain experts. Our research is focused on reducing the transformation effort by providing component inference and integration tools. The Semantic Web envisions a new standardized information infrastructure to enable interoperable machine-to-machine interactions and automatic or semi-automatic service chaining for deriving knowledge over networks. This paper describes a generic framework and implementation of how the Semantic Web proceeds through the life cycle of geospatial knowledge transformation, from geospatial modeling (knowledge formalization), through model instantiation (service chain) to model execution (data product). Our approach relies on semantic integrations. A number of ontologies used to capture domain knowledge are introduced in this paper as the basis of knowledge bases for describing and reasoning geospatial data and services. Also, a semantically enabled geospatial catalog service is described to enable more effective discovery, automation and integration of geospatial data and services."
}
@article{DaveKolas2008,
author={Dave Kolas,},
title={Supporting Spatial Semantics with SPARQL},
journal={Transactions in GIS},
year={2008},
volume={12},
number={s1},
pages={5--18},
url={http://dx.doi.org/10.1111/j.1467-9671.2008.01132.x},
abstract={Though the intersection of spatial data and semantic web technologies holds significant promise, there are still many challenges before this promise can be realized. One of these challenges is query representation. History suggests that an appropriate solution is a specialized query language for spatial data; however, with a broad interpretation of the SPARQL specification and extensions that would be useful outside the spatial realm, one can use SPARQL to query spatial concepts effectively. This article establishes a set of desiderata for a query language capable of dealing with spatial Semantic Web-based data, discusses the challenges facing such a query language, and addresses these challenges with straightforward solutions that are broadly applicable. The effectiveness of these extensions is demonstrated using example queries.},
issn={1467-9671}
}
@article{JohnGoodwin2008,
author={John Goodwin, Catherine Dolbear Glen Hart},
title={Geographical Linked Data: The Administrative Geography of Great Britain on the Semantic Web},
journal={Transactions in GIS},
year={2008},
volume={12},
number={s1},
pages={19--30},
url={http://dx.doi.org/10.1111/j.1467-9671.2008.01133.x},
abstract={Ordnance Survey, the national mapping agency of Great Britain, is investigating how semantic web technologies assist its role as a geographical information provider. A major part of this work involves the development of prototype products and datasets in RDF. This article discusses the production of an example dataset for the administrative geography of Great Britain, demonstrating the advantages of explicitly encoding topological relations between geographic entities over traditional spatial queries. We also outline how these data can be linked to other datasets on the web of linked data and some of the challenges that this raises.},
issn={1467-9671}
}
@article{RalucaZaharia2008,
author={Raluca Zaharia, Laurentiu Vasiliu Joerg Hoffman Eva Klien},
title={Semantic Execution Meets Geospatial Web Services: A Pilot Application},
journal={Transactions in GIS},
year={2008},
volume={12},
number={s1},
pages={59--73},
url={http://dx.doi.org/10.1111/j.1467-9671.2008.01135.x},
abstract={Geospatial web services can be enhanced with semantic web service techniques in order to solve the existing interoperability issues in the geospatial domain. Therefore a large number of services can be composed to provide meaningful results to complex geospatial queries, but as the complexity grows, the users face serious performance problems. On top of existing geospatial web services we adopt the WSMO/L/X framework which provides a model to define machine and human-understandable semantic descriptions, full support for mediation and a simple language to choreograph the execution of a composition of several geospatial web services. Our research focus is on the semantic execution and its performance inside the WSMX platform. Our core contributions are: (1) providing a solution for automated semantic execution of geospatial queries; and (2) providing a combination of techniques and improvements to the efficiency aspect.},
issn={1467-9671}
}
@article{Morozov20061403,
title = "A generalized web service model for geophysical data processing and modeling",
journal = "Computers & Geosciences",
volume = "32",
number = "9",
pages = "1403 - 1410",
year = "2006",
note = "",
issn = "0098-3004",
doi = "DOI: 10.1016/j.cageo.2005.12.010",
url = "http://www.sciencedirect.com/science/article/B6V7D-4J7B113-1/2/b5cae2d667
ba77807674374b01e1cd30",
author = "Igor Morozov and Brian Reilkoff and Glenn Chubak",
keywords = "Web service",
keywords = "Geophysics",
keywords = "Seismology",
keywords = "Processing",
abstract = "
A web service model for geophysical data manipulation, analysis and modeling based on a generalized data processing system was implemented. The service is not limited to any specific data type or operation and allows the user to combine ~190 tools of the existing package, and new codes easily includable. It allows remote execution of complex processing flows completely designed and controlled by remote clients who are presented with mirror images of the server processing environment. Clients are also able to upload their processing flows to the server, thereby building a knowledge base of processing expertise shared by the community. Flows in this knowledge base are currently represented by a hierarchy of automatically generated interactive web forms. These flows can be accessed and the resulting data retrieved by either using a web browser or through API calls from within the clients' applications. The server administrator is thus relieved of the need for development of any content-specific data access mechanisms. The underlying processing system is fully developed and includes a graphical user interface, parallel processing capabilities, on-line documentation, on-line software distribution service and automatic code updates. Currently, the service is installed on the University of Saskatchewan seismology web server (http://seisweb.usask.ca/SIA/ps.php) and maintains a library of processing examples (http://seisweb.usask.ca/temp/examples) including a number of useful web tools (such as UTM coordinate transformations, calculation of travel times of seismic waves in a global Earth model and generation of color palettes). Important potential applications of this web service model for building intelligent data queries, processing and modeling of global seismological data are also discussed."
}
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