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GeoSPARQL+: Syntax, Semantics and System for Integrated Querying of Graph, Raster and Vector Data – Technical Report [article]

Timo Homburg, Steffen Staab, Daniel Janke
2020 arXiv   pre-print
We introduce an approach to semantically represent and query raster data in a Semantic Web graph.  ...  We extend the GeoSPARQL vocabulary and query language to support raster data as a new type of geospatial data.  ...  Work by Steffen Staab was partially supported by DFG through the project LA 2672/1, Language-integrated Semantic Querying (LISeQ).  ... 
arXiv:2009.05032v1 fatcat:abmi76jbfbdqrm6spafnxkkdre


D. E. Varanka
2022 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
Data integration from outside sources was tested through SPARQL and GeoSPARQL queries.  ...  Technical aspects of the prototype software succeeded, but customization was found to be needed for user-based design.  ...  ACKNOWLEDGEMENTS Programming and other technical support for the MapKB project was completed by Matthew E. Wagner, Jacques Bourquin, and Tanner Fry and is gratefully acknowledged.  ... 
doi:10.5194/isprs-archives-xlviii-4-w1-2022-511-2022 fatcat:e5bmp3tukjfujfqgtktl4usdsa

Finding and sharing GIS methods based on the questions they answer

S. Scheider, A. Ballatore, R. Lemmens
2018 International Journal of Digital Earth  
Even though the semantics of the questions answered by these tools can be broadly shared, tools and data sources are still divided by syntax and platform-specific technicalities.  ...  To support the matching process, we define a tractable subset of SPARQL, the query language of the Semantic Web, and we propose and test an algorithm for computing query containment.  ...  Acknowledgments We would like to thank Wim Feringa from ITC for the graphical design of Figure 1 . Disclosure statement No potential conflict of interest was reported by the authors.  ... 
doi:10.1080/17538947.2018.1470688 fatcat:6jtj3kzg6ba7bdq72qyjjsga2e

Evaluating Geospatial RDF stores Using the Benchmark Geographica 2

Theofilos Ioannidis, George Garbis, Kostis Kyzirakos, Konstantina Bereta, Manolis Koubarakis
2020 Zenodo  
geometries, new tests and queries that reveal the scalability of these systems.  ...  Alongside with the ever-increasing size of linked geospatial data that semantic stores need to handle, all the above provided our group the motivation to improve our single node systems benchmark Geographica  ...  and for the queries, including N-triples for data, and SQL, SPARQL, Datalog and openCypher as concrete query language syntaxes for query workloads.  ... 
doi:10.5281/zenodo.4090759 fatcat:ay7z23psp5fsdfci2wq7q3xpo4

GeoTriples: Transforming geospatial data into RDF graphs using R2RML and RML mappings

Kostis Kyzirakos, Dimitrianos Savva, Ioannis Vlachopoulos, Alexandros Vasileiou, Nikolaos Karalis, Manolis Koubarakis, Stefan Manegold
2018 Journal of Web Semantics  
GeoTriples allows the transformation of geospatial data stored in raw files (shapefiles, CSV, KML, XML, GML and GeoJSON) and spatially-enabled RDBMS (PostGIS and MonetDB) into RDF graphs using well-known  ...  vocabularies like GeoSPARQL and stSPARQL, but without being tightly coupled to a specific vocabulary.  ...  Geospatial data can come in vector or raster form and are usually accompanied by metadata.  ... 
doi:10.1016/j.websem.2018.08.003 fatcat:frayuscv45ay5iyqdbkzsmewr4

Semantically-Aware Retrieval of Oceanographic Phenomena Annotated on Satellite Images

Vasilis Kopsachilis, Lucia Siciliani, Marco Polignano, Pol Kolokoussis, Michail Vaitis, Marco de de Gemmis, Konstantinos Topouzelis
2021 Information  
A big issue of these approaches is the lack of coincidence between the information that can be extracted from the visual data and the interpretation that the same data have for a user in a given situation  ...  The growing need for effective retrieval of related information has motivated the adoption of semantically aware strategies on satellite images with different spatio-temporal and spectral characteristics  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/info12080321 fatcat:r7y3y4ntdvecfc7f36dnqnxryu

State Of The Art Analysis Report

Miguel Ángel Esbrí
2014 Zenodo  
This document is the "State of the art analysis report" deliverable and its main objective is to collect information about standards, existing technologies, architectures and systems developed in other  ...  projects, as well as initia-tives and policies and data sources repositories (specially at local, national and European level) which are relevant for defining and implementing the different aspects of  ...  Query operations, such as SORT, JOIN, AGGREGATE, are fully supported by SPARQL and it offers specifically graph traversal syntax for data represented as a graph.  ... 
doi:10.5281/zenodo.200497 fatcat:otpyumabc5fbpgqmixtgmt7hli

State-of-the-art on Mobility Data sharing standards V2

2021 Zenodo  
Cross-domain standards are also considered, for the federation of cloud services, data catalogues (e.g. with DCAT-AP), and for the sharing of geospatial data and Linked open data.  ...  This study covers public transport Data formats (Transmodel, NeTEx, SIRI, GTFS, etc.), data for micro-mobility and shared mobility, road data, pricing and ticketing data.  ...  Knowledge graphs are fully integrated platforms for data unification, analytics, and sharing made possible by semantic graph formatting and ontological rules.  ... 
doi:10.5281/zenodo.6822215 fatcat:6kpxr6d6nzahfl5debw3tqy2ay

Trust Indicator For Decisions Based On Geospatial Data

Ivanildo Barbosa, Marco A. Casanova
2011 Brazilian Symposium on GeoInformatics  
One key issue in Peer Data Management Systems (PDMSs) is the heterogeneity of the peer schemas. To help matters, ontologies may be used as uniform conceptual representation of these schemas.  ...  In order to provide geospatial semantics when mapping, we have defined and used a reference geospatial ontology.  ...  The members of and the students of my Introduction to Geographic Information Science have been very helpful critics and supporters of this work.  ... 
dblp:conf/geoinfo/BarbosaC11 fatcat:czol77uae5fsti3kdck5oe33xe

D33.2 Earth Science metadata, semantics and ontology harmonization report

Yannis Marketakis, Yannis Tzitzikas
2013 Zenodo  
requirements and (c) describing general approaches for harmonization/integration of information and how they fit into SCIDIP-ES (and in particular in WP33).  ...  Earth science communities use various ontologies/schemas to describe different kinds of datasets and for different reasons, and there is not an integrated (harmonized) schema for describing all concepts  ...  For this reason the concept of Layers and Styles are introduced. These are used to transform vector or raster data into a graphical format (from which the original data cannot be retrieved).  ... 
doi:10.5281/zenodo.3275163 fatcat:auuz2aiqabh47jdipeewa7wr2e

3D Point Clouds in Archaeology: Advances in Acquisition, Processing and Knowledge Integration Applied to Quasi-Planar Objects

Florent Poux, Romain Neuville, Line Van Wersch, Gilles-Antoine Nys, Roland Billen
2017 Geosciences  
Then, we integrate the metadata in an archaeological smart point cloud data structure allowing spatio-semantic queries related to CIDOC-CRM.  ...  It is intended to be a common language for domain experts and implementers to formulate requirements for information systems and to serve as a guide for good practice of conceptual modelling.  ...  The founding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.  ... 
doi:10.3390/geosciences7040096 fatcat:toyztyz5nzehpgd6jr7d4duhbe

D2.1 Dare Architecture and Technical Positioning

Malcolm Atkinson, Emanuele Casarotti, Malin Ewering, Rosa Filgueira, André Gemünd, Iraklis Klampanos, Antonis Koukourikos, Amrey Krause, Federica Magnoni, Andrea Pagani, Christian Pagé, Andreas Rietbrock (+2 others)
2018 Zenodo  
The requirements for large-scale data-driven research with high data volume, computational and complexity.  ...  The deliverable summarises the reequirements, outlines an architecture and framework, reports progress with prototyping the platform and identifies the form of future implementations.  ...  It will support the resolution of data and resources based on high-level queries and metadata. Big Data Europe Integrator (BDI) platform [Auer et al. 2017 ].  ... 
doi:10.5281/zenodo.2613550 fatcat:s32p3orrerev5einzlmils34mu

Spatial ontologies for architectural heritage [article]

Currently, geomatics permits the obtaining of very accurate and dense 3D models (possibly enriched with textures) and derived products, in both raster and vector format.  ...  Another challenging issue is the exploitation of automated reasoning possibilities. The solution is the use of domain ontologies as a reference for data modelling in information systems.  ...  Web. 193 Geonames GeoSPARQL -a geographic query language for RDF data The OGC GeoSPARQL standard supports representing and querying geospatial data on the Semantic Web.  ... 
doi:10.6092/polito/porto/2644378 fatcat:35kq22epabeehgvzviz2x64jja

A Content Management System for Spatio-Temporal Data: Tadaima

Vincenza Anna Leano
The proposed framework exploits the RDF technology for definition and manipulation of (meta-) data and adopts the OGC standards and open source technologies (PostGIS, Geoserver and Openlayers) for encoding  ...  of a Content Management System (CMS).  ...  There is also a proposal of standard to query this RDF data, namely GeoSPARQL (OGC, 2012).  ... 
doi:10.6092/unina/fedoa/9303 fatcat:tvgiall4sff2vd6khejk7knop4

The Analysis of Open Source Software and Data for Establishment of GIS Services Throughout the Network in a Mapping Organization at National or International Level

Mehrdad Jafari Salim, P. Boccardo
POLITECNICO DI TORINO Doctorate school PhD in Environment and Territory -Environmental Protection and Management XXV cycle Final Dissertation T Th he e a an na al ly ys si is s o of f o op pe en n s so  ...  ou ur rc ce e s so of ft tw wa ar re e a an nd d D Da at ta a f fo or r e es st ta ab bl li is sh hm me en nt t o of f G GI IS S s se er rv vi ic ce es s t th hr ro ou ug gh ho ou ut t t th he e n ne  ...  GeoSPARQL -Geographic SPARQL Protocol and RDF Query Language: representation and querying of geospatial data for the Semantic Web; WTS -Web Terrain Service (WTS); In this Thesis, it has been assured that  ... 
doi:10.6092/polito/porto/2540693 fatcat:eid3tyuhsrattck633ho6vsjwu
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