Tools and Resources

SemaPlorer -Making Sense of Collective Data

SemaPlorer is an easy to use application that allows end users to interactively explore and visualize a very large, mixed-quality and semantically heterogeneous distributed semantic data set in real-time. Its purpose is to acquaint oneself about a city, touristic area, or other area of interest. By visualizing the data using a map, media, and different context views, we clearly go beyond simple storage and retrieval of large numbers of triples. http://btc.isweb.uni-koblenz.de/  
 

A Model of Events based on a Foundational Ontology

The lack of a formal event model hinders interoperability in
distributed event-based systems. Consequently, we developed a formal
model of events, called F. The model bases on an upper-level ontology
and provides comprehensive support for all aspects of events such as
time and space, objects and persons involved, as well as the structural
aspects, namely mereological, causal, and correlational relationships.
The event model ßrovides a flexible means for event composition,
modeling of event causality and correlation, and allows for
representing different interpretations of the same event. The
foundational event model F is developed in a pattern-oriented approach,
modularized in different ontologies, and can be easily extended by
domain specific ontologies.
http://isweb.uni-koblenz.de/eventmodel/

Visual Retrieval and Localization Tool

With the WeKnowIt Visual Retrieval and Localization web-based tool
(ViRaL) you can make queries with city photos, find similar ones and
identify them on the map. Using a large database of geo-tagged images
from Flickr™, ViRaL can match a given query and return a ranked list of
images according to visual similarity. The geo-tags of the returned
images are used to provide an estimate of the location of the query
photo and display it using Google Maps™. The most common tags of these
images are also shown, giving a hint of e.g. what landmark might be
depicted in the query.

The tool is available online at:
http://www.image.ntua.gr/iva/tools/viral

csxPOI - Collaborative Creation of Semantic Points of Interest as Linked Data on the Mobile Phone

The novel mobile application csxPOI (short for: collaborative, semantic, and context-aware points-of-interest) enables its users to collaboratively create, share, and modify semantic points of interest (POI). Semantic POIs describe geographic places with explicit semantic properties of a collaboratively created ontology. As the ontology includes multiple subclassifications and instantiations and as it links to DBpedia, the richness of annotation goes far beyond mere textual annotations such as text. With the intuitive interface of csxPOI, users can easily create, delete, and modify their POIs and those shared by others. Thereby, the users adapt the structure of the ontology underlying the semantic annotations of the POIs. Data mining techniques are employed to cluster and thus improve the quality of the collaboratively created POIs. The semantic POIs and collaborative POI ontology are published as Linked Open Data.

The tool is available online at:
http://isweb.uni-koblenz.de/Research/systeme/csxPOI