16. Sächsisches GIS-Forum, Dresden: 4. Oktober, 2016

1. SENSLOG API as Tools for Collection of Big
VGI Data.
Karel Charvat, Michal Kepka, Runar Bergheim, Simon
Leitgeb, Dmitrij Kozuch, Tomas Reznik
04.10.2016 GI 2016

2. SensLog
• SensLog is an integrated solution for sensor
networks.
• SensLog consists of data model and server-side
application which is capable to store, analyses and
publish data in various ways.
• SensLog receives measured data from nodes or
gateways, stores data properly in the database, pre-
processes for easier queries if desired and then
publishes data through the system of web-services.
04.10.2016 GI 2016

3. SensLog
• SensLog is suitable for sensor networks with static
sensors (e.g. meteorological stations) as well as for
mobile sensors (e.g. tracking of vehicles, human-as-
sensor).
• Database model was based on standardized data
model for observations from OGC
Observations&Measurements.
04.10.2016 GI 2016

4. SensLog
• Main component for storing, managing and
publishing sensor data
• Meeting point for measured sensor data
• Provides REST API for both sides of chain – data
producers and data consumers
• Works above relation DB with spatial extension –
can provide variety of analytical services
04.10.2016 GI 2016

5. Database model - core
04.10.2016 GI 2016

6. Database model - VGI extension
Core model
04.10.2016 GI 2016

7. SensLog VGI extension
• Stores VGI observations from web and mobile
applications
• Attributes of VGI observations not only simple
datatypes but multimedia files too
• Few mandatory attributes, optional according to
users needs with only small limitation on data
volume
04.10.2016 GI 2016

8. Examples of usage
Ground water monitoring
Meteorogical station
04.10.2016 GI 2016

9. Farm Telemetry
04.10.2016 GI 2016

10. VGI examples
04.10.2016 GI 2016

11. White board example
04.10.2016 GI 2016

12. SensLog
• Source code available on:
https://github.com/mkepka/senslog
• News and detail documentation:
http://sdi4apps.eu/keywords/opensensorsnetwork/
• Running instance on:
http://portal.sdi4apps.eu/SensLog-VGI/
The instance is under high development now…
…new features are available every day!
04.10.2016 GI 2016

13. HSLayers NG, HSLayers NG Mobile
• Source code of HSLayers available on:
https://github.com/hslayers/hslayers-ng
• Source Code of HSlayers Mobile available on
https://github.com/hslayers/cordova
• Web Pages https://ng.hslayers.org/
• charvat@ccss.cz
04.10.2016 GI 2016