Accessibility is a fundamental aspect in transportation, routing, and spare-time activity plannin... more Accessibility is a fundamental aspect in transportation, routing, and spare-time activity planning concerning traveling in modern cities. In this context, interactive web-based accessibility-map visualization techniques and systems are important tools for provisioning, exploration, analysis, and assessment of multi-modal and location-based travel time data and routing information. To enable their effective application, such interactive visualization techniques demands for flexible mappings with respect to user-adjustable parameters such as maximum travel times, the types of transportation used, or used color schemes. However, traditional approaches for web-based visualization of accessibility-maps do not allow this degree of parametrization without significant latencies introduced by required data processing and transmission between the routing server and the visualization client. This paper presents a novel web-based visualization technique that allows for efficient client-side mapping and rendering of accessibility data onto transportation networks using WebGL and the OpenGL transmission format. A performance evaluation and comparison shows the superior performance of the approach over alternative implementations.
Der Rat der Europäischen Union bereitet eine neue Richtlinie zur Festlegung grundlegender Sicherh... more Der Rat der Europäischen Union bereitet eine neue Richtlinie zur Festlegung grundlegender Sicherheitsnormen „für den Schutz vor den Gefahren einer Exposition gegenüber ionisierender Strahlung“ vor. Diese Richtlinie definiert – sobald sie durch das Europäische Parlament verabschiedet wurde – unter anderem neue Referenzwerte für die Radonkonzentrationen in Gebäuden, welche in nationales Recht umgesetzt werden müssen. Die Konsequenz für die Behörden der Mitgliedsstaaten der Europäischen Union ist die Einführung von Programmen, um bestehende Expositionssituationen – zu denen die Exposition von Radon in Gebäuden zählt – zu ermitteln und zu bewerten.
In Zusammenarbeit mit dem Bundesamt für Strahlenschutz wurde nach Lösungen gesucht, die die Radonkonzentration in der Innenraumluft zuverlässig in orientierenden Kurzzeitmessungen bestimmen können. Radon-Fachstellen aus Österreich, Liechtenstein, der Schweiz, Süddeutschland und Südtirol (Arbeitsgruppe DACHI) haben 2011 ein Messprotokoll für ein Schnellverfahren entwickelt, welches orientierende Messungen in einem Zeitraum von sieben Tagen zulassen soll. Dieses Protokoll galt es auf Robustheit zu überprüfen. Dafür wurde ein Computer-Simulationstool entworfen und implementiert. Die entwickelte Software simuliert gemäß des erwähnten Protokolls virtuelle Messkampagnen, die auf realen Radon-Messwerten basieren. Dadurch wird eine Bewertung des Schnellverfahrens ermöglicht.
"The council of the European Union is preparing a new directive which is laying down basic safety... more "The council of the European Union is preparing a new directive which is laying down basic safety standards for protection against the dangers arising from exposure to ionising radiation. This directive – once passed by the European Parliament – is suggesting various reference levels for indoor radon concentrations which have to be anchored in national laws. The consequence for the authorities in the member states of the European Union is to establish programmes to identify and valuate existing exposure situations.
The German Federal Office for Radiation Protection is currently preparing such programmes. Among other things, its researching for reliable, short-term, orientating measurements for indoor radon concentrations. Various radon agencies from Austria, Switzerland, southern Germany and South Tyrol developed a measurement protocol which allows orientating measurements of indoor radon within seven days.
This protocol is now being tested and evaluated for scientific robustness. Therefore, with this document a computer-simulation tool will be designed and implemented. This software will allow to simulate virtual measurement campaigns based on real radon concentration data and finally to evaluate the mentioned protocol."
Ethereum Stack Exchange "Crowdsourced Documentation Initiative" pitch at the EthDev Ethereum Meet... more Ethereum Stack Exchange "Crowdsourced Documentation Initiative" pitch at the EthDev Ethereum Meetup in Berlin in March 2016.
This thesis presents a novel visualization technique and web-based method for network-based reach... more This thesis presents a novel visualization technique and web-based method for network-based reachability analysis. The challenge is to enable a broad range of easily accessible tools for displaying both generalized polygonal maps and complete, highly detailed transportation network infrastructures for web clients and mobile devices. The main problems associated with this task are: (1) the transmission of massive geodata sets, (2) the mapping and rendering of unfiltered and non-generalized networks in real-time, and (3) dynamic user interaction, stylization, and parameterization.
To undertake this challenge, a web-mapping framework is extended via a Web Graphics Library (WebGL) enabled renderer that receives data in the Graphics Library Transmission Format (glTF). The geodata are processed using a specialized backend server and packed in binary buffer objects that are passed directly to the rendering stage of a frontend client. The display of massive transportation networks is enabled by utilizing the Graphics Processing Units (GPUs) of the client’s device. The binary glTF greatly reduces the transmission bandwidth required, and it is directly readable by the GPU without requiring costly client-side mapping computation. Dynamic stylization is enabled in fragment shaders per user defined parameters.
This study includes a full technical specification of the backend services, required geographic projections, transmission format specifics, and client renderer details. A proof-of-concept application shows the feasibility of the proposed approach and allows for evaluation and comparison with existing techniques. A collaboration with a local startup provided insight into viable use cases for the technique. The present prototype is the first web-based tool of its kind to render complete, unfiltered transportation networks. The technique, however, is universally adaptable to any geographic network and is not limited to networks; i.e., it is potentially operable for points or polygonal features with slight modifications.
Accessibility is a fundamental aspect in transportation, routing, and spare-time activity plannin... more Accessibility is a fundamental aspect in transportation, routing, and spare-time activity planning concerning traveling in modern cities. In this context, interactive web-based accessibility-map visualization techniques and systems are important tools for provisioning, exploration, analysis, and assessment of multi-modal and location-based travel time data and routing information. To enable their effective application, such interactive visualization techniques demands for flexible mappings with respect to user-adjustable parameters such as maximum travel times, the types of transportation used, or used color schemes. However, traditional approaches for web-based visualization of accessibility-maps do not allow this degree of parametrization without significant latencies introduced by required data processing and transmission between the routing server and the visualization client. This paper presents a novel web-based visualization technique that allows for efficient client-side mapping and rendering of accessibility data onto transportation networks using WebGL and the OpenGL transmission format. A performance evaluation and comparison shows the superior performance of the approach over alternative implementations.
Der Rat der Europäischen Union bereitet eine neue Richtlinie zur Festlegung grundlegender Sicherh... more Der Rat der Europäischen Union bereitet eine neue Richtlinie zur Festlegung grundlegender Sicherheitsnormen „für den Schutz vor den Gefahren einer Exposition gegenüber ionisierender Strahlung“ vor. Diese Richtlinie definiert – sobald sie durch das Europäische Parlament verabschiedet wurde – unter anderem neue Referenzwerte für die Radonkonzentrationen in Gebäuden, welche in nationales Recht umgesetzt werden müssen. Die Konsequenz für die Behörden der Mitgliedsstaaten der Europäischen Union ist die Einführung von Programmen, um bestehende Expositionssituationen – zu denen die Exposition von Radon in Gebäuden zählt – zu ermitteln und zu bewerten.
In Zusammenarbeit mit dem Bundesamt für Strahlenschutz wurde nach Lösungen gesucht, die die Radonkonzentration in der Innenraumluft zuverlässig in orientierenden Kurzzeitmessungen bestimmen können. Radon-Fachstellen aus Österreich, Liechtenstein, der Schweiz, Süddeutschland und Südtirol (Arbeitsgruppe DACHI) haben 2011 ein Messprotokoll für ein Schnellverfahren entwickelt, welches orientierende Messungen in einem Zeitraum von sieben Tagen zulassen soll. Dieses Protokoll galt es auf Robustheit zu überprüfen. Dafür wurde ein Computer-Simulationstool entworfen und implementiert. Die entwickelte Software simuliert gemäß des erwähnten Protokolls virtuelle Messkampagnen, die auf realen Radon-Messwerten basieren. Dadurch wird eine Bewertung des Schnellverfahrens ermöglicht.
"The council of the European Union is preparing a new directive which is laying down basic safety... more "The council of the European Union is preparing a new directive which is laying down basic safety standards for protection against the dangers arising from exposure to ionising radiation. This directive – once passed by the European Parliament – is suggesting various reference levels for indoor radon concentrations which have to be anchored in national laws. The consequence for the authorities in the member states of the European Union is to establish programmes to identify and valuate existing exposure situations.
The German Federal Office for Radiation Protection is currently preparing such programmes. Among other things, its researching for reliable, short-term, orientating measurements for indoor radon concentrations. Various radon agencies from Austria, Switzerland, southern Germany and South Tyrol developed a measurement protocol which allows orientating measurements of indoor radon within seven days.
This protocol is now being tested and evaluated for scientific robustness. Therefore, with this document a computer-simulation tool will be designed and implemented. This software will allow to simulate virtual measurement campaigns based on real radon concentration data and finally to evaluate the mentioned protocol."
Ethereum Stack Exchange "Crowdsourced Documentation Initiative" pitch at the EthDev Ethereum Meet... more Ethereum Stack Exchange "Crowdsourced Documentation Initiative" pitch at the EthDev Ethereum Meetup in Berlin in March 2016.
This thesis presents a novel visualization technique and web-based method for network-based reach... more This thesis presents a novel visualization technique and web-based method for network-based reachability analysis. The challenge is to enable a broad range of easily accessible tools for displaying both generalized polygonal maps and complete, highly detailed transportation network infrastructures for web clients and mobile devices. The main problems associated with this task are: (1) the transmission of massive geodata sets, (2) the mapping and rendering of unfiltered and non-generalized networks in real-time, and (3) dynamic user interaction, stylization, and parameterization.
To undertake this challenge, a web-mapping framework is extended via a Web Graphics Library (WebGL) enabled renderer that receives data in the Graphics Library Transmission Format (glTF). The geodata are processed using a specialized backend server and packed in binary buffer objects that are passed directly to the rendering stage of a frontend client. The display of massive transportation networks is enabled by utilizing the Graphics Processing Units (GPUs) of the client’s device. The binary glTF greatly reduces the transmission bandwidth required, and it is directly readable by the GPU without requiring costly client-side mapping computation. Dynamic stylization is enabled in fragment shaders per user defined parameters.
This study includes a full technical specification of the backend services, required geographic projections, transmission format specifics, and client renderer details. A proof-of-concept application shows the feasibility of the proposed approach and allows for evaluation and comparison with existing techniques. A collaboration with a local startup provided insight into viable use cases for the technique. The present prototype is the first web-based tool of its kind to render complete, unfiltered transportation networks. The technique, however, is universally adaptable to any geographic network and is not limited to networks; i.e., it is potentially operable for points or polygonal features with slight modifications.
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Papers by A. Schoedon
In Zusammenarbeit mit dem Bundesamt für Strahlenschutz wurde nach Lösungen gesucht, die die Radonkonzentration in der Innenraumluft zuverlässig in orientierenden Kurzzeitmessungen bestimmen können. Radon-Fachstellen aus Österreich, Liechtenstein, der Schweiz, Süddeutschland und Südtirol (Arbeitsgruppe DACHI) haben 2011 ein Messprotokoll für ein Schnellverfahren entwickelt, welches orientierende Messungen in einem Zeitraum von sieben Tagen zulassen soll. Dieses Protokoll galt es auf Robustheit zu überprüfen. Dafür wurde ein Computer-Simulationstool entworfen und implementiert. Die entwickelte Software simuliert gemäß des erwähnten Protokolls virtuelle Messkampagnen, die auf realen Radon-Messwerten basieren. Dadurch wird eine Bewertung des Schnellverfahrens ermöglicht.
The German Federal Office for Radiation Protection is currently preparing such programmes. Among other things, its researching for reliable, short-term, orientating measurements for indoor radon concentrations. Various radon agencies from Austria, Switzerland, southern Germany and South Tyrol developed a measurement protocol which allows orientating measurements of indoor radon within seven days.
This protocol is now being tested and evaluated for scientific robustness. Therefore, with this document a computer-simulation tool will be designed and implemented. This software will allow to simulate virtual measurement campaigns based on real radon concentration data and finally to evaluate the mentioned protocol."
Talks by A. Schoedon
Books by A. Schoedon
To undertake this challenge, a web-mapping framework is extended via a Web Graphics Library (WebGL) enabled renderer that receives data in the Graphics Library Transmission Format (glTF). The geodata are processed using a specialized backend server and packed in binary buffer objects that are passed directly to the rendering stage of a frontend client. The display of massive transportation networks is enabled by utilizing the Graphics Processing Units (GPUs) of the client’s device. The binary glTF greatly reduces the transmission bandwidth required, and it is directly readable by the GPU without requiring costly client-side mapping computation. Dynamic stylization is enabled in fragment shaders per user defined parameters.
This study includes a full technical specification of the backend services, required geographic projections, transmission format specifics, and client renderer details. A proof-of-concept application shows the feasibility of the proposed approach and allows for evaluation and comparison with existing techniques. A collaboration with a local startup provided insight into viable use cases for the technique. The present prototype is the first web-based tool of its kind to render complete, unfiltered transportation networks. The technique, however, is universally adaptable to any geographic network and is not limited to networks; i.e., it is potentially operable for points or polygonal features with slight modifications.
In Zusammenarbeit mit dem Bundesamt für Strahlenschutz wurde nach Lösungen gesucht, die die Radonkonzentration in der Innenraumluft zuverlässig in orientierenden Kurzzeitmessungen bestimmen können. Radon-Fachstellen aus Österreich, Liechtenstein, der Schweiz, Süddeutschland und Südtirol (Arbeitsgruppe DACHI) haben 2011 ein Messprotokoll für ein Schnellverfahren entwickelt, welches orientierende Messungen in einem Zeitraum von sieben Tagen zulassen soll. Dieses Protokoll galt es auf Robustheit zu überprüfen. Dafür wurde ein Computer-Simulationstool entworfen und implementiert. Die entwickelte Software simuliert gemäß des erwähnten Protokolls virtuelle Messkampagnen, die auf realen Radon-Messwerten basieren. Dadurch wird eine Bewertung des Schnellverfahrens ermöglicht.
The German Federal Office for Radiation Protection is currently preparing such programmes. Among other things, its researching for reliable, short-term, orientating measurements for indoor radon concentrations. Various radon agencies from Austria, Switzerland, southern Germany and South Tyrol developed a measurement protocol which allows orientating measurements of indoor radon within seven days.
This protocol is now being tested and evaluated for scientific robustness. Therefore, with this document a computer-simulation tool will be designed and implemented. This software will allow to simulate virtual measurement campaigns based on real radon concentration data and finally to evaluate the mentioned protocol."
To undertake this challenge, a web-mapping framework is extended via a Web Graphics Library (WebGL) enabled renderer that receives data in the Graphics Library Transmission Format (glTF). The geodata are processed using a specialized backend server and packed in binary buffer objects that are passed directly to the rendering stage of a frontend client. The display of massive transportation networks is enabled by utilizing the Graphics Processing Units (GPUs) of the client’s device. The binary glTF greatly reduces the transmission bandwidth required, and it is directly readable by the GPU without requiring costly client-side mapping computation. Dynamic stylization is enabled in fragment shaders per user defined parameters.
This study includes a full technical specification of the backend services, required geographic projections, transmission format specifics, and client renderer details. A proof-of-concept application shows the feasibility of the proposed approach and allows for evaluation and comparison with existing techniques. A collaboration with a local startup provided insight into viable use cases for the technique. The present prototype is the first web-based tool of its kind to render complete, unfiltered transportation networks. The technique, however, is universally adaptable to any geographic network and is not limited to networks; i.e., it is potentially operable for points or polygonal features with slight modifications.