This document provides the updated documentation of the NFDI4Earth Software Architecture. The documentation summarizes the major use cases, gives an overview on the requirement analysis approaches for the NFDI4Earth services, points out envisioned quality goals, and introduces potential stakeholders of the architecture. Specifically, the documentation provides externally and internally driven constraints that need to be considered when developing or contributing to NFDI4Earth services. We herewith facilitate, the users to better understand the solution strategy for the NFDI4Earth architecture.We use the arc42 template for the documentation of software and system architecture. The detailed description of the NFDI4Earth architecture is done by using a blackbox-whitebox approach that describes the major aim, the main functionalities and interfaces of the services as seen by the outward facing properties first (blackbox), e.g., user perspective, and then provides details on the (inner) solutions, e.g., service components, implementations (whitebox).The envisioned target group of the documentation includes software developers and architects as well as service providers.

This work has been funded by the German Research Foundation (DFG) through the project NFDI4Earth (DFG project no. 460036893, https://www.nfdi4earth.de/) within the German National Research Data Infrastructure (NFDI, https://www.nfdi.de/).