The Atlantic Regional Initiative Topic 3: Cities and Ports (ARIA3) ESA-funded project aims to develop several customised Earth Observation-based information services to support decision making processes by local stakeholders in the Atlantic Region. Those services shall cover three sub-topics: Climate Resilience, Atlantic Cities and Ports and Protecting the Ocean. User current data practices and service requirements shall be identified by contacts with a wide variety of entities as port authorities, municipalities, environmental agencies, and other economic coastal activities.