A systematic review of multi-dimensional quality assessment tools for urban green spaces. 
We conducted a systematic review of quality assessment tools for urban green spaces to evaluate their replicability, comparability and validity.  We assessed the characteristics of 15 published, multi-dimensional, direct observation tools regarding: publication, development, features and included dimensions.  Even though all tools show acceptable inter-rater variability, there is a notable variability in their characteristics, from required time to conduct the assessment to the number of included items.  Additionally, some specific dimensions are underrepresented, and the study units' definitions are feeble.  We showcased the need for new tools that are more comprehensive and include more consistent reporting measures.