Vegetation - Lower Feather River Update - 2018 [ds2891]

The Feather River was mapped using 2018 National Agricultural Inventory Program (NAIP) imagery, and using a classification developed by the California Native Plant Society (CNPS) based in the National Vegetation Classification System (NVCS). A report describing mapping methodology for a similar project can be found here: nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=184992 . For more information about California's classification, see vegetation.cnps.org/ .Changes in a remap effort can occur due to several factors, some due to physical change and some due to non-physical change.

Examples of factors that represent physical change are: stand maturation or decadence, fire, erosion, deposition, anthropogenic disturbances such as scraping/clearing, urban development, agricultural development, and restoration. Non-physical changes include: improvement in imagery quality, incorrect original mapping, imagery shifts, improvement of older linework, and change in level mapped (classification). Imagery quality continues to improve with time, which allows the photointerpreter to better determine which species are present and in what amounts to determine its best classification.