The document summarizes the objectives and approach of the e-ROSA project. The e-ROSA project aims to (1) build a community of researchers and stakeholders in agricultural data science, (2) map the current landscape of relevant research infrastructures, projects, policies, and (3) develop a roadmap to guide the creation of a European open science infrastructure for agriculture. To achieve these objectives, e-ROSA will conduct a bibliometric analysis, develop an online map of existing resources, solicit input through an open call, and validate findings through workshops. The end goal is to provide a comprehensive overview of the current state of agricultural data and help establish a shared vision for open science in the agriculture domain in Europe