This piece discusses a number of issues with using ordinal rating systems for determining tree risk. Numerous ordinal ratings systems have been in use for the past two decades, but recent findings have determined that they are poor indicators of actual risk and a number of measurement errors exist in their use.
The article details these issues.
Articles
The following articles by Natural Path staff cover a range of current urban forestry topics. They are available for download by selecting the respective PDF links. If reprinted or referenced, please use the citation listed in the footer of each article. All topics can be the subject of a conference presentation.
An Assessment of
Ordinal Tree Risk Rating Systems
Mark Duntemann and Nicole Stuart
The article details these issues.