On 13th March 2015, the Interoperability Day, a national/regional event with the aim of discussing OGC standards, took place in Barcelona. It was organized by the Foro Ibérico y Latinoamericano del OGC and the Asociación Catalana de Tecnologías de la Información Geospacial (ACTIG). It brought together projects involved in the implementation of standards. This event was part of the Technical Committee Meeting (TC) of the Open Geospatial Consortium (OGC) that took place from 9th to 13th of March. One of the organizers of this technical meeting was CREAF, coordinator of the H2020 project WaterInnEU. This project is a CSA funded under the same call as WIDEST. As a result of a previous networking session in Brussels, WIDEST was invited to the Interoperability Day in Barcelona to introduce the main tasks and objectives of the project.