Work with data
Tools aimed at helping practitioners and communities turn data from low-cost sensors and wearables into FAIR and CARE information ā easy to access, combine and trust, and ready to support evidence-based policy.
Data tools
31 toolsTools developed within CitiObs to turn data collected by citizens into reliable, usable information. They help you organise and share data using open standards, check and correct its quality, and explore it on maps and charts, from single sensor readings to air quality maps of Europe.
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STA Support
Technical components supporting interoperable exchange of sensor data through the OGC SensorThings API and STAplus. These repositories include API extensions, a Python client and WebSub-related components for accessing and exchanging environmental observations. 
WebSubSTA-WebSub
The STA-WebSub OGC Standard enables to use a compliant SensorThings service to deliver event triggered data notifications to subscribers using HTTP asynchronous messaging.
Asynchronous messagingSTA-WebSub Discovery implementation
This implementation supports a developer to determine whether a SensorThings service supports the STA-WebSub standard. The implementation shows a simple data log for testing data delivery after subscription.
Asynchronous messagingSTA-WebSub Hub implementation
The STA-WebSub Hub implementation allows the subscription from and delivery of topics to subscribers. This asynchronous messaging ensures data delivery 'when it happens' and makes the classic polling unnecessary.
Asynchronous messagingSTA-WebSub plugin for FROST-Server
The STA-WebSub plugin for the FROST-Server is the implementation in CitiObs that enables the discovery of self-defined topics with a SensorThings service, e.g. a STAplus service from CitiObs.
Asynchronous messagingSTA-WebSub Subscriber implementation
The STA-WebSub Subscriber implementation supports the data receiver to manage their subscriptions and the actions to be taken when data is delivered.
Asynchronous messagingSTA-WebSub Viewer
Illustration of live updates on a chart received from the CitiObs STA-WebSub Hub connected to the CitiObs STAplus SensorThings API service with STA-WebSub
STAplus standardSTAplus
A backwards-compatible SensorThings extension for observations owned by many contributors, with licences, relations, and groups.
Data toolSTAplus Connector
The STAPplus Connector is a technical service that uses the OGC SensorThings API and its STAplus extension to organise citizen-generated environmental data, credit contributors, respect privacy and licensing, and make the data interoperable, reusable, and ready to support decision-making.
STAplus standardSTAplus Corrigendum
OGC 22-022r2 replaces STAplus 1.0 and records the 1.0.1 corrections for parties, licences, and personal-data statements.
Citizen Science with STAplusSTAplus DGGS Viewer
The STAplus DGGS Viewer visualizes the air quality data captured with the PMScan and SCK sensor on a map. Anonymous and personal access are available.
Citizen Science with STAplusSTAplus GDPR plugin implementation
The STAplus GDPR plugin implements the STAplus-GDPR Standard. The plugin can be deployed with the Fraunhofer FROST-Server framework which is the open source reference implementation for the OGC SensorThings API.