Author Archives: Daniel Hladky

Linked Open Data Switzerland at SWBI2015

Daniel Hladky from Ontos presented GeoKnow at the SWBI2015 conference two talks.

The first talk was the keynote on October 7, 2015 with the title “Linked Data Service (LINDAS): Status quo of the Linked Data life-cycle and lessons learned“. Within this keynote an introduction was given to the LOD2 based linked data life-cycle and the LINDAS platform. The LINDAS system is based on the GeoKnow Generator tool that was developed by Ontos during the GeoKnow project. At the end of the talk an outlook was given on future developments such as an improved natural language processing system based on neural networks and the new visualisation dashboards for RDF data.

The second talk on October 8, 2015 was part of the Linked Data Switzerland workshop. The focus on this talk was to set the stage of Linked Open Data in Switzerland using the LINDAS platform. Further the various participants discussed issues that have to be solved. For example how to build an linked data economy that publishes as many as possible datasets and how to motivate companies and individuals to start to develop new applications base don the datasets.

Spatial Data on the Web

On January 6, 2015 the W3C has officially launched the Open Geospatial Consortium (OGC) and the W3C working group for spatial data. Ontos has voted and supported the charter on behalf of the GeoKnow project. This is the result of the joint workshop held in March 2014 together with the SmartOpenData project. The GeoKnow team is looking forward to support this activity and future standards for spatial data on the web. As an example, the GeoKnow team (represented by Valentina Janev and Jens Lehmann) co-organises a spatial data session with W3C (represented by Phil Archer) at the ICIST conference in March:

More information about the OGC can be found on
W3C News here
W3C press release
The workshop about linking geospatial data
The W3C working group for spatial data:

Ontos starts project at SECO using GeoKnow Generator

Ontos was selected as an implementation partner at SECO to implement a linked data stack platform. Based on the GeoKnow Generator Ontos will develop a data management and search platform that will allow the management of linked open government data. The GeoKnow generator will used as the backend system that orchestrates the various tools. In a first version triplification of data and the interlinking will be implemented.

GeoLD Workshop

The GeoKnow team has organised the first international workshop on Geospatial Linked Data. The workshop was part of the SEMANTICS 2014conference that toke place in Leipzig, Germany. On behalf of GeoKnow Ontos acted as the sponsor for the GeoLD workshop and coordinated the call for papers, the final agenda and invited some of the guest speakers. Jens Lehman (AKSW) has made the welcome and Phil Archer from W3C reported on the progress towards a joint W3C/OGC working group. Further Matthias Wauer (Unister) and Claus Stadler (AKSW) presented the GeoKnow tools. More about the GeoLD workshop can be found on

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GeoKnow Plenary Meeting Belgrade

The GeoKnow team meets in Belgrade for the plenary meeting. During the 2 days the team discusses the achievements since the 1 year review meeting. Besides the ongoing improvement of the various tools the team discusses the topic of benchmarking and quality assessment. A key focus of benchmarking is on Virtuoso store, Facete and Mappify, LIMES, FAGI, GeoLift and TripleGeo. Results of the benchmarks will be published on

On the second day and the break-out sessions each individual work-package was thoroughly discussed and next steps were defined. Some of the findings are:
- Dashboard requirements and batch processing
- Parallelisation of LIMES process
- Notification and subscription service
- Mobile version for smart phones and tablets
- More free datasets that can be used for the use cases

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W3C Swiss Day and GeoKnow

Ontos is the W3C Switzerland representative and presents at the W3C Swiss Day the result of the GeoKnow project. Approximately 30 people attend the event that takes place in Fribourg, Switzerland. Daniel Hladky shows the GeoKnow generator and tools during the talk of “Linked Open Data”. Based on the online demo server a simple scenario is shown in order to attract people and customers to use the result of the GeoKnow project. For more details about the event visit the event home page at

GeoKnow plenary meeting (29.01.2014) in Luxembourg after the 1 Year Review

The GeoKnow project just went through the Year 1 Review and straight after that meeting the consortium met for the plenary meeting on the 29 January 2014 in order to plan the activities within the work packages for the 2nd year. Below you will find the major high level information about the tasks that we will tackle in the upcoming months.

Work Package 1: One of the tasks will be to work on an authentication system that will connect the workbench with the underlying components. The initial version will be graph-based and tightly connected to the Virtuoso Graphs Security function. A first version should be ready by end of May 2014. In an extended version we will add multiple login options such as G+, Web ID etc. Another important issue is to work on scalability and therefore work on the benchmark such as the slippy benchmark, the BSBM BI load and harmonise this with the LDBC. Within the GeoKnow Workbench we will develop a dashboard and simple Workflow system that will allow the specification of processes that are interlinked and will be executed in the background and provide the monitoring of those processes.

Work Package 2: The team will work on improving algorithms related to geospatial dimensions that will support queries in relation to the different use cases. Most of the improvement will be within Task 2.6. InfAI and Athena will elaborate on on enhancements for the TripleGeo module that will include topics such as schema mappings and better support for the transformation process. Those activities are mostly a part of Task 2.7 and will also help to improve the scalability of the GeoKnow system.

Work Package 3: A high workload is related to task 3.2 and the integration of the tools such as FAGI, Facete and LIMES inside the GeoKnow Workbench. The integration work consist two parts. The first mainly concerns a tight technology integration and the second takes care of user interactions. Within task 3.3 major work will be devoted to the improvement of the GeoLift module and adding new datasets into the spatial mapping process. This will help to enrich the RDF datasets and create a larger knowledge base. Precision and and comparison of geospatial features such as metrics for polygons are the core challenges within task 3.4 that have to be solved and implemented. Based on those new implementations the link discovery process within LIMES has to be adapted and evaluated.

Work Package 4: Within WP4 the focus is on the visualisation and interaction with the users. IMP will add components that support mobile devices and a major step is to fully integrate the Facete and Mappify module inside the workbench. An improvement in filtering and selection will help users to navigate faster to the content. Further we have to solve the integration challenge of CubeViz and Facete. The above modules have to satisfy the requirements for knowledge engineer users but also for end users that will use just simplified UI versions to navigate and explore geospatial data content in the browser or on a mobile device.

Work Package 5: The main objective is to present at the next plenary meeting a supply chain scenario that is already using large portions of the GeoKnow workbench and have a real use case feedback.

Work Package 6: The real use case from the travel industry will do a full benchmark including the usage of the workbench on the transformation process including external and internal datasets. Further within this task will be a test where visualisation components will be deployed to the end user portals. Such a benchmark will provide feedback in scalability and handling and therefore provide deep insight about functional requirement, architectural issues and performance.

Work Package 7: Part of the dissemination work is to launch the GeoKnow workbench at two major events in March 2014 and attract a community that will start to use and test the system. Based on this we will be able to collect additional information that will help to tune the system. We will also provide documentation and tutorials on the Web page and continue to closely work with other funded projects.

Work Package 8: InfAI will continue the excellent work on managing the project, collecting and submitting the reports on time and hosting an advisory board telco. The next plenary meeting is set to take place in June 2014 and will most likely be organised by IMP in Belgrade.

Summary and Outlook
There are many small challenges that have to be solved but the major objective is to improve the overall integration of tools, run benchmarks with real use cases and work on scalability.

Ontos to present GeoKnow Generator at Swiss Archives on 29.01.2014

Ontos is invited to present the 1 Year result of the GeoKnow Generator at the Swiss Archives in Bern on January 29, 2014. The event is organised by Swiss Archives and it is expected that many representatives from the Swiss Government will participate at this event. The objective of the event is to launch the “Open Data” initiative in Switzerland. Jon Jay Le Grange will give a brief overview of the current GeoKnow Generator Framework.