Request Closed: October 25, 2023 9:00 am — November 24, 2023 11:59 pm

The Open Geospatial Consortium (OGC) seeks public comment on the Model for Underground Data Definition and Integration (MUDDI) Conceptual Model candidate Standard. The MUDDI Conceptual Model serves as a framework to make datasets that utilize different information for underground objects interoperable, exchangeable, and more easily manageable. Comments are due by November 24, 2023.

The MUDDI Conceptual Model represents real-world objects found underground. It was designed as a common basis to create implementations that make different types of subsurface data – such as those relating to utilities, transport infrastructure, soils, ground water, or environmental parameters – interoperable in support of a variety of use cases and in different jurisdictions and user communities. 

MUDDI aims to be comprehensive and provides sufficient level of detail to address many different application use cases, such as:

  • Routine street excavations;
  • Emergency response;
  • Utility maintenance programs;
  • Large scale construction projects;
  • Disaster planning;
  • Disaster response; 
  • Climate Change mitigation; or
  • Smart Cities programs.

The MUDDI Conceptual Model provides the implementation community with the flexibility to tailor the implementations to specific requirements in a local, regional, or national context. The standardization targets are specific MUDDI implementations in one or more encodings such as GML (Geographic Markup Language), SFS (Simple Features SQL), or JSON encodings. 

The MUDDI Conceptual Model consists of a core of mandatory classes describing built infrastructure networks (such as utility networks) together with a number of optional feature classes, properties, and relationships related to the natural and built underground environment. The creation of implementations targeted to defined use cases and user communities also allows the extension of the concepts provided in the MUDDI Conceptual Model.

OGC Members interested in staying up to date on the progress of this standard, or contributing to its development, are encouraged to join the MUDDI Standards Working Group (SWG) via the OGC Portal. Non-OGC members who would like to know more about participating in this SWG are encouraged to contact the OGC Standards Program.

The candidate OGC MUDDI Conceptual Model Standard (23-024) (.HTML) is available for review and comment on the OGC Portal. Comments are due by November 24, 2023, and should be submitted via the method below.

To Comment: 

Comments can be submitted to a dedicated email reflector for a period ending on the “Close request date” listed above. Comments received will be consolidated and reviewed by OGC members for incorporation into the document. Please submit your comments via this email address, using this Comments Template for the message body.

Subscribe to Comments:

You may wish to subscribe to the distribution list to receive comments as they are submitted. Subscribing to the list will also allow you to view comments already received, which can be found in the List Archives.


Climate Change, Climate Resilience, Disaster Management, Emergency Management, Infrastructure, MUDDI, Smart Cities, underground