OPIHI is a citizen science project. All of the data collected by OPIHI participants is available on this site. OPIHI does not make any claims about the accuracy or precision of this data. Some of the data from 2004–2007 was collected using quadrat percent cover, rather than quadrat point counts. For these data sets, we translated the data to read in point counts. Please contact us if you would like more information about our methodology, about how we scrub the data prior to scientific analyses, or if you are interested in sharing OPIHI data through public displays.