One view of your living environment, on open standards
A digital twin is a virtual model of the physical living environment. It combines data to track the situation and support policy. Open standards ensure your twin works with other systems and twins.
A virtual representation of the living environment
You see all relevant data sources in one place, for policy, implementation and monitoring, across themes such as liveability, sustainability, housing and mobility.
The twin is built on open standards to improve interoperability: your data and components work together with other systems and twins.
Three steps
One environment
The data is brought together in one reliable environment, with integrations and quality control.
Test scenarios
You simulate scenarios and test choices without physical risk.
Does it fit what you already have?
The architecture is modular and fits existing infrastructure. You connect your own systems via the platform, or you use Clappform solutions.
On this page you can read which open standards the platform supports. How you share data and who gets access to it is covered on the Access and management page.
Open standards and reuse as a starting point
The platform follows the Common Ground principles: data stays at the source and is shared through open APIs.
Clappform takes part in developments in the Network of Local Digital Twins (NLDT), for interoperability of the platform with other digital twins.
Standards the platform supports
OGC API - Processes, Part 1: Core
The platform’s data API uses this standard to write records.
OGC SensorThings API
For sensor data. Clappform built a translation layer to SensorThings in the Geonovum Testbed Sensordata 2026.
Read the case
OpenAPI Specification
The platform’s APIs are described according to the OpenAPI Specification.
OGC web services (WMS, WFS and WMTS)
For maps.
Open protocols
gRPC
An open-source protocol that powers the platform's data API.
Customer case Municipality of Alkmaar
Frequently asked questions
1
What is a digital twin?
A virtual model of the physical living environment. It combines data to track the situation and support policy.
2
Does it connect to our existing systems?
Yes. The architecture is modular. You connect your own systems through the platform, or you use Clappform solutions.
3
Which open standards does the platform support?
OGC API - Processes, the OGC SensorThings API, the OpenAPI Specification and OGC web services for maps.
4
What does Common Ground mean for the platform?
Clappform works with open standards and APIs, so your data and components stay reusable.
5
What is the NLDT?
The NLDT is the Netwerk van Lokale Digitale Tweelingen (Network of Local Digital Twins), in which municipalities work together on digital twins of their living environment. Clappform helps build the liveability module.
6
How up to date is the view?
That depends on the sources. The platform retrieves data at the source and checks it at every load. How often a source refreshes differs per source.