Vegetation - Lower Feather River Update - 2018 [ds2891]

The Feather River was mapped using 2018 National Agricalutural 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: https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=184992.For more information about Californias classification, see https://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 photo interpreter to better determine which species are present and in what amounts to determine its best classification. A photo interpreter could also disagree with the previous mappers decisions and may change the classification in the remapping effort. A more subtle map change, which does not affect the acreages significantly, is when the photo interpreter improves old linework to make it better fit the classification type visually. Also, when the NAIP imagery is ortho-rectified, in some years it does not perfectly align with the year it is being compared to and linework needs to be shifted/redrawn. Lastly, a photo interpreter may have remapped an Alliance at the Group level due to lack of confidence at the Alliance level, and vice versa the interpreter may have mapped an Alliance that was previously mapped at Group level due to better confidence at that level. All of these factors should be taken into consideration when using and comparing these data to previous efforts.

Data and Resources

Field	Value
accessLevel	public
catalog_@context	https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy	https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier	fed11eb5-a874-4973-bf4e-9dfe42c5d9a8
issued	2022-01-28T23:48:45.000Z
modified	2022-01-28T23:48:58.289Z
publisher	California Department of Fish and Wildlife
resource-type	Dataset
source_datajson_identifier	true
source_hash	23038a6721ee62a2d993ad0f443b90acaa7db58c
source_schema_version	1.1
theme	{"Natural Resources",Water}
Groups	AmeriGEOSS National Provider North America
Tags	a-manual-of-california-vegetation amerigeo amerigeoss authcdfw biota butte california-department-of-fish-and-wildlife california-natural-resources-agency california-wildlife-habitat-relationships caopendata cdfw change-detection ckan ds289120211217wm environment farming geo geoss habitat imagerybasemapsearthcover inlandwaters mapping national national-vegetation-classification-standard north-america sutter united-states vegetation yuba
isopen	False
license_id	notspecified
license_title	License not specified
maintainer	BIOS_Admin
maintainer_email	bios@wildlife.ca.gov
metadata_created	2025-11-19T20:23:12.175156
metadata_modified	2025-11-19T20:23:12.175162
notes	The Feather River was mapped using 2018 National Agricalutural 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: https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=184992.For more information about Californias classification, see https://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 photo interpreter to better determine which species are present and in what amounts to determine its best classification. A photo interpreter could also disagree with the previous mappers decisions and may change the classification in the remapping effort. A more subtle map change, which does not affect the acreages significantly, is when the photo interpreter improves old linework to make it better fit the classification type visually. Also, when the NAIP imagery is ortho-rectified, in some years it does not perfectly align with the year it is being compared to and linework needs to be shifted/redrawn. Lastly, a photo interpreter may have remapped an Alliance at the Group level due to lack of confidence at the Alliance level, and vice versa the interpreter may have mapped an Alliance that was previously mapped at Group level due to better confidence at that level. All of these factors should be taken into consideration when using and comparing these data to previous efforts.
num_resources	6
num_tags	29
title	Vegetation - Lower Feather River Update - 2018 [ds2891]