The categories in which information was gathered and classified for each suggested indicator were: 1) status of importance or applicability, 2) the focus, issue or content of indicator, 3) measurement unit, 4) description of value/s of the measurement units, 5) description or information of the frequency of measurements and the history of past measurements, 6) the possible producer or provider of the information, and 7) others aspects/problems/future perspectives, and if used in another sector. In table 1, suggested indicators for nature-based recreation are presented. For these two indicators, there was quantitative and up-to-date data available at the national level.