scholarly journals Conciliating Perspectives from Mapping Agencies and Web of Data on Successful European SDIs: Toward a European Geographic Knowledge Graph

2020 ◽  
Vol 9 (2) ◽  
pp. 62 ◽  
Author(s):  
Bénédicte Bucher ◽  
Esa Tiainen ◽  
Thomas Ellett von Brasch ◽  
Paul Janssen ◽  
Dimitris Kotzinos ◽  
...  
Keyword(s):  
Spatial Data ◽  
Geographical Information ◽  
Knowledge Graph ◽  
Geographic Knowledge ◽  
Computer Scientists ◽  
Web Of Data ◽  
Data Infrastructures ◽  
Spatial Data Infrastructures ◽  
The One ◽  
The Web

Spatial Data Infrastructures (SDIs) are a key asset for Europe. This paper concentrates on unsolved issues in SDIs in Europe related to the management of semantic heterogeneities. It studies contributions and competences from two communities in this field: cartographers, authoritative data providers, and geographic information scientists on the one hand, and computer scientists working on the Web of Data on the other. During several workshops organized by the EuroSDR and Eurogeographics organizations, the authors analyzed their complementarity and discovered reasons for the difficult collaboration between these communities. They have different and sometimes conflicting perspectives on what successful SDIs should look like, as well as on priorities. We developed a proposal to integrate both perspectives, which is centered on the elaboration of an open European Geographical Knowledge Graph. Its structure reuses results from the literature on geographical information ontologies. It is associated with a multifaceted roadmap addressing interrelated aspects of SDIs.

An Assessment of Several Taxonomies of Volunteered Geographic Information

2013 ◽  
pp. 1794-1808
Author(s):  
Antony K Cooper ◽  
Serena Coetzee ◽  
Derrick G Kourie
Keyword(s):  
Spatial Data ◽  
Formal Concept Analysis ◽  
Geographic Information ◽  
Geographical Information ◽  
User Generated Content ◽  
Formal Concept ◽  
Data Bases ◽  
Data Infrastructures ◽  
Spatial Data Infrastructures ◽  
Official Data

User-Generated Content (UGC) in general, and Volunteered Geographical Information (VGI) in particular, are becoming more important as sources for official data bases, such as those used in national Spatial Data Infrastructures (SDIs). Discovering and assessing VGI as suitable geospatial resources for one’s purposes is hence becoming more important, but can be difficult. One way of assessing VGI resources is by classifying them into different types of resources, i.e. a taxonomy of resources. The question is whether such taxonomies can accurately identify suitable VGI resources. We assess five taxonomies both subjectively and using formal concept analysis to determine their discrimination adequacy, that is, how well the taxonomies discriminate between repositories containing UGC in general, or VGI in particular.

An Assessment of Several Taxonomies of Volunteered Geographic Information

2012 ◽  
pp. 21-36
Author(s):  
Antony K Cooper ◽  
Serena Coetzee ◽  
Derrick G Kourie
Keyword(s):  
Spatial Data ◽  
Formal Concept Analysis ◽  
Geographic Information ◽  
Geographical Information ◽  
User Generated Content ◽  
Formal Concept ◽  
Data Bases ◽  
Data Infrastructures ◽  
Spatial Data Infrastructures ◽  
Official Data

User-Generated Content (UGC) in general, and Volunteered Geographical Information (VGI) in particular, are becoming more important as sources for official data bases, such as those used in national Spatial Data Infrastructures (SDIs). Discovering and assessing VGI as suitable geospatial resources for one’s purposes is hence becoming more important, but can be difficult. One way of assessing VGI resources is by classifying them into different types of resources, i.e. a taxonomy of resources. The question is whether such taxonomies can accurately identify suitable VGI resources. We assess five taxonomies both subjectively and using formal concept analysis to determine their discrimination adequacy, that is, how well the taxonomies discriminate between repositories containing UGC in general, or VGI in particular.

scholarly journals APLICACIÓN DE ÍNDICES DE FORMA EN LA DETERMINACIÓN DE POLÍGONOS SLIVERS DERIVADOS DE LAS DIMENSIONES LINEALES DE UNA FIGURA Y SU ÁREA

2017 ◽  
Author(s):  
Áurea Gallego Salguero ◽  
Miguel Sánchez Marco
Keyword(s):  
Spatial Analysis ◽  
Environmental Impact ◽  
Spatial Data ◽  
Geographical Information Systems ◽  
Work Design ◽  
Geographical Information ◽  
Government Agencies ◽  
Real Problem ◽  
Data Infrastructures ◽  
Spatial Data Infrastructures

Nowadays cartography is more and more required by users, companies and government agencies. A lot of tasks need digital, updated and quality cartography: Civil work design, planning, landscaping, environmental impact, conservation, etc. This need of cartography is mostly solved by spatial data infrastructures and map servers that make downloading and getting maps easy. Later, using Geographical Information Systems (GIS) it is quite easy to perform queries and geoprocessing operations in order to get valuable information which is difficult to get with other tools. However slivers polygons are a serious problem. They can alter the results in spatial analysis, queries and map portray. A map with sliver polygons is a map with false polygons and therefore with errors. We need to remove them. Removing sliver polygons is simple once they have been located. The real problem is to manage to locate them. Some sliver polygons are small, others are large but in both cases sliver polygons are difficult to locate and tell them apart from other polygons. Scientists have used formulas to calculate the shape of objects for many years. Today there are dozens of formulas available that could be used in the characterization and location of polygons slivers. In this article many of these shape formulas are analyzed and conclusions are drawn on whether they can be used in locating sliver polygons.http://dx.doi.org/10.4995/CIGeo2017.2017.6567

Supporting Aeronautical Information Management (AIM) Through Geographic Information Technologies and Spatial Data Infrastructures (SDI)

2016 ◽  
Vol 7 (3) ◽  
pp. 1-37
Author(s):  
Willington Siabato ◽  
Javier Moya-Honduvilla ◽  
Miguel Ángel Bernabé-Poveda
Keyword(s):  
Information Management ◽  
Spatial Data ◽  
Information Technologies ◽  
Geographic Information ◽  
Information Services ◽  
Air Traffic ◽  
Geographic Information Technologies ◽  
Web Architecture ◽  
Data Infrastructures ◽  
Spatial Data Infrastructures

The way aeronautical information is managed and disseminated must be modernized. Current aeronautical information services (AIS) methods for storing, publishing, disseminating, querying, and updating the volume of data required for the effective management of air traffic control have become obsolete. This does not contribute to preventing airspace congestion, which turns into a limiting factor for economic growth and generates negative effects on the environment. Owing to this, some work plans for improving AIS and air traffic flow focus on data and services interoperability to allow an efficient and coordinated use and exchange of aeronautical information. Geographic information technologies (GIT) and spatial data infrastructures (SDI) are comprehensive technologies upon which any service that integrates geospatial information can rely. The authors are working on the assumption that the foundations and underlying technologies of GIT and SDI can be applied to support aeronautical data and services, considering that aeronautical information contains a large number of geospatial components. This article presents the design, development, and implementation of a Web-based system architecture to evolve and enhance the use and management of aeronautical information in any context, e.g., in aeronautical charts on board, in control towers, and in aeronautical information services. After conducting a study into the use of aeronautical information, it was found that users demand specific requirements regarding reliability, flexibility, customization, integration, standardization, and cost reduction. These issues are not being addressed with existing systems and methods. A system compliant with geographic standards (OGC, ISO) and aeronautical regulations (ICAO, EUROCONTROL) and supported by a scalable and distributed Web architecture is proposed. This proposal would solve the shortcomings identified in the study and provide aeronautical information management (AIM) with new methods and strategies. In order to seek aeronautical data and services interoperability, a comprehensive aeronautical metadata profile has been defined. This proposal facilitates the use, retrieval, updating, querying, and editing of aeronautical information, as well as its exchange between different private and public institutions. The tests and validations have shown that the proposal is achievable.

Reviewing the status of national spatial data infrastructures in Africa

Survey Review ◽  
2016 ◽  
Vol 50 (360) ◽  
pp. 191-200 ◽  
Author(s):  
Collins Mwange ◽  
Galcano Canny Mulaku ◽  
David N Siriba
Keyword(s):  
Spatial Data ◽  
The Status ◽  
Data Infrastructures ◽  
Spatial Data Infrastructures

scholarly journals Μοντέλα χώρου - χρόνου για την περιγραφή γεωγραφικών φαινομένων σε χωρικές πληροφοριακές υποδομές

2013 ◽  
Author(s):  
Γεώργιος Πανόπουλος
Keyword(s):  
Spatial Data ◽  
Data Infrastructures ◽  
Spatial Data Infrastructures

Η σύνθετη φύση του Χρόνου και της Μεταβολής συνεχίζουν να καθιστούν το σχεδιασμό χώρο-χρονικών μοντέλων ως ένα σύνθετο ζήτημα, αν και έχουν πραγματοποιηθεί σημαντικές ερευνητικές εξελίξεις. Παράλληλα, η σύγχρονη τάση στην καταγραφή των γεωγραφικών φαινομένων επιβάλει την συνεκτική και ευρέως προσπελάσιμη περιγραφή τους υπό τη μορφή Υποδομών Χωρικών Πληροφοριών (Spatial Data Infrastructures – SDIs). Σκοπός της παρούσας Διατριβής είναι η διερεύνηση της επέκτασης των Εννοιολογικών Μοντέλων που προδιαγράφονται σε Υποδομές Χωρικών Πληροφοριών, έτσι ώστε να αποδίδουν τη Χώρο-Χρονική συμπεριφορά των Οντοτήτων, και να δίνουν τη δυνατότητα εκτέλεση εργασιών Χώρο-Χρονικής Ανάλυσης. Συγκεκριμένα, δόθηκε έμφαση στην επέκταση του Γενικευμένου Εννοιολογικού Μοντέλου που εφαρμόζεται στην Ευρωπαϊκή Υποδομή Χωρικών Πληροφοριών (INSPIRE), ώστε να συμπληρωθεί με ένα Base Model, το οποίο να μπορεί να χρησιμοποιεί επικουρικά κατά τη σύνταξη των εξειδικευμένων Μοντέλων Δεδομένων (Application Schemas) των 34 Θεματικών Επιπέδων της Οδηγίας. Αν και το Γενικευμένο Εννοιολογικό Μοντέλο του INSPIRE προβλέπει χαρακτηριστικά και UML στερεότυπα για την καταγραφή της χρονικής πληροφορίας, δεν διαθέτει πλήρες Base Model για απόδοση των αντικειμένων ως χώρο-χρονικά.Στην παρούσα διατριβή, αφενός τεκμηριώνονται και αξιολογούνται τα μοντέλα χωρικής αναπαράστασης που υιοθετούνται από τα διεθνή πρότυπα και τις σύγχρονες Χωρικές Υποδομές, και αφετέρου, εισάγονται έννοιες σε ένα μοντέλο το οποίο να είναι ικανό να αντιμετωπίσει χρονικά ζητήματα. Ο στόχος είναι να τυποποιηθούν αυτές οι έννοιες σε ένα ενοποιημένο μοντέλο βάσης δεδομένων, ικανό να διαχειρίζεται όχι μόνο χωρικά ζητήματα, αλλά και τη μεταβολή των φαινομένων. Από την ανάλυση των εξειδικευμένων Application Schemas του INSPIRE εντοπίζονται βασικές απαιτήσεις χώρο-χρονικής ανάλυσης σε εφαρμογές. Αφού διερευνάται η αποτελεσματικότητα των διαθέσιμων δυνατοτήτων αναπαράστασης των χρονικών ιδιοτήτων της Οδηγίας για να αντιμετωπιστούν οι απαιτήσεις αυτές, καθορίζεται η έννοια των Χώρο-Χρονικών Μονάδων (Spatiotemporal Units - STUs) και περιγράφεται η επέκταση του ΓΕΜ του INSPIRE ώστε να συμπεριλάβει την Ταυτότητα και τη Χρονική Μεταβολή. Τα STUs μπορούν να υποβληθούν σε 4 μοναδιαίες μεταβολές, και αυτό αξιοποιείται για να συστηματοποιηθεί ο τρόπος εντοπισμού των ευρύτερων Μεταβολών στα application schemas.Έχοντας ορίσει τις Χώρο-Χρονικές Μονάδες, εξετάζεται η συνεισφορά του προτεινόμενου μοντέλου, με το πώς μπορούν εξυπηρετήσουν τα STUs τις διαδικασίες χώρο-χρονικής Ανάλυσης μέσω των δεδομένων ενός SDI. Ανάγονται οι χρονικές ιδιότητες με τρόπο όμοιο με των χωρικών, ώστε να εκφραστούν έννοιες όπως η Κλίμακα, η Ακρίβεια, η Οπτικοποίηση, και η Γενίκευση, και εξετάζεται ο βαθμός συνεισφοράς των Χώρο-Χρονικών Μονάδων. Ειδικά για την περίπτωση της Χώρο-Χρονικής Εννοιολογικής Γενίκευσης, καθορίζονται τέσσερεις (4) τελεστές, οι οποίοι περιγράφουν πως μπορεί να αλλάξει η χρονική κλίμακα των δεδομένων για ανάγκες ανάλυσης. Τέλος, το προτεινόμενο μοντέλο αξιοποιείται και αξιολογείται σε επίπεδο συγκεκριμένων εφαρμογών, καθώς δοκιμάζεται η υιοθέτηση των STUs ως τύπων αντικειμένων σε ισχύοντα application schemas του INSPIRE

scholarly journals Development of geoportal for landslide monitoring

2012 ◽  
Vol 92 (4) ◽  
pp. 63-78
Author(s):  
Dubravka Sladic ◽  
Milan Vrtunski ◽  
Ivan Alargic ◽  
Aleksandra Ristic ◽  
Dusan Petrovacki
Keyword(s):  
Real Time ◽  
Spatial Data ◽  
Service Oriented Architecture ◽  
Reference Value ◽  
Landslide Monitoring ◽  
Alert System ◽  
Service Oriented ◽  
Data Infrastructures ◽  
Spatial Data Infrastructures

The paper presents the implementation of geoportal for landslide monitoring which which includes two subsystems: a system for acquisition, storage and distribution of data on landslides and real time alert system. System for acquisition, storage and distribution of data on landslides include raster and vector spatial data on landslides affected areas, as well as metadata. Alert system in real time is associated with a sensor for detecting displacement, which performs constant measurements and signals in case of exceeding the reference value. The system was developed in accordance with the standards in the field of GIS: ISO 19100 series of standards and OpenGIS Consortium and is based on service-oriented architecture and principles of spatial data infrastructures.

Sign in / Sign up

Export Citation Format

Share Document