The 'Characteristics of Citizen Science' is a collaborative effort undertaken by citizen science researchers and practitioners from around the globe, with input gathered from more than 200 contributors to a comprehensive survey - in order to capture the views of researchers, practitioners, public officials and the wider public. This work attempts to represent a wide range of opinions in an inclusive way, to allow for different types of projects and programmes, where context-specific criteria can be set.

The explanation notes provide more discussion about how these characteristics were created and what they mean in practice.

You can find the outcomes and descriptions of this work in the Zenodo repository:

https://zenodo.org/communities/citscicharacteristics

I recently gave a presentation of this work to the WeObserve Impact Community of Practice, for which you can find the slides here: https://www2.slideshare.net/MobileMaggie/the-ecsa-characteristics-of-citizen-science