Name: Vegetation _ Modoc Plateau _ Shinn Likely and Snowstorm Mountain Areas _ 2020 _ ds2877
Display Field: MCVName
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Under contract to the California Department of Fish and Wildlife (CDFW), The Geographical Information Center (GIC) was tasked with creating a fine-scale vegetation and land use map of portions of the Modoc Plateau in northeastern California. The mapping effort was done in a two phases. The first phase started in 2016 and covered the ecoregion subsections named Cottonwood-Skedaddle Mountains, Likely Mountain, and the eastern portion of Eagle Lake-Observation Peak (Miles and Goudey 1997) which covered nearly 1.1 million acres. The second phase began in 2018 and covered the ecoregion subsections named Devil’s Garden and Adin Mountains, which covered an additional 866,228 acres. This map was produced during phase one of the project and covers approximately 1,091,702 acres in eastern Lassen and southern Modoc counties. The vegetation map followed guidelines set forth by the National Vegetation Classification System (NVCS) and A Manual of California Vegetation (MCV). It is an Alliance level map overall, with photo-interpreters attempting to map to the more specific Association level when they were confident to go to that level of detail. The GIC used 2016 NAIP imagery for mapping. Accuracy assessments were performed in 2018 and 2020. The minimum mapping unit (MMU) varies by vegetation type. For standard vegetation polygons the MMU is 1 acre. For wetland and riparian areas, the MMU is 0.25 acres. Polygons on the border of the mapping boundary did not have a MMU. For Agriculture and Urban areas, the MMU is 1 acre For Water, the MMU is 1 acre (with the exception of small earthen dams which went down to .25 acres).More information can be found in the project report, which is bundled with the vegetation map published for BIOS here: https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/2800_2899/ds2877.zip
Copyright Text: This map was created by The Geographical Information Center (GIC). It was prepared for publication in BIOS by the California Department of Fish and Wildlife’s (CDFW) Vegetation Classification and Mapping Program (VegCAMP).
MapClass: Pinus ponderosa - Calocedrus decurrens / Ceanothus prostratus Association
ID: Juniperus occidentalis Alliance
Name: Juniperus occidentalis Alliance
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Name: Juniperus occidentalis Alliance
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MapClass: Juniperus occidentalis Alliance
ID: Juniperus occidentalis - (Pinus jeffreyi - Pinus ponderosa) / Cercocarpus ledifolius Association
Name: Juniperus occidentalis - (Pinus jeffreyi - Pinus ponderosa) / Cercocarpus ledifolius Association
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Name: Juniperus occidentalis - (Pinus jeffreyi - Pinus ponderosa) / Cercocarpus ledifolius Association
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MapClass: Juniperus occidentalis - (Pinus jeffreyi - Pinus ponderosa) / Cercocarpus ledifolius Association
ID: Juniperus occidentalis / (Poa secunda - Festuca idahoensis - Pseudoroegneria spicata) Association
Name: Juniperus occidentalis / (Poa secunda - Festuca idahoensis - Pseudoroegneria spicata) Association
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Name: Juniperus occidentalis / (Poa secunda - Festuca idahoensis - Pseudoroegneria spicata) Association
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MapClass: Juniperus occidentalis / (Poa secunda - Festuca idahoensis - Pseudoroegneria spicata) Association
ID: Juniperus occidentalis / Artemisia arbuscula / Poa secunda Association
Name: Juniperus occidentalis / Artemisia arbuscula / Poa secunda Association
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Name: Juniperus occidentalis / Artemisia arbuscula / Poa secunda Association
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MapClass: Juniperus occidentalis / Artemisia arbuscula / Poa secunda Association
ID: Juniperus occidentalis / Artemisia tridentata - Purshia tridentata Association
Name: Juniperus occidentalis / Artemisia tridentata - Purshia tridentata Association
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Name: Juniperus occidentalis / Artemisia tridentata - Purshia tridentata Association
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MapClass: Juniperus occidentalis / Artemisia tridentata - Purshia tridentata Association
Name: Water
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MapClass: Water
ID: Western North American Temperate Freshwater Aquatic Vegetation Group
Name: Western North American Temperate Freshwater Aquatic Vegetation Group
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Name: Western North American Temperate Freshwater Aquatic Vegetation Group
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MapClass: Western North American Temperate Freshwater Aquatic Vegetation Group
ID: Columbia Plateau cliff, scree and rock mapping unit
Name: Columbia Plateau cliff, scree and rock mapping unit
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Name: Columbia Plateau cliff, scree and rock mapping unit
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MapClass: Columbia Plateau cliff, scree and rock mapping unit
ID: Western North American Sparsely Vegetated Rivershore mapping unit
Name: Western North American Sparsely Vegetated Rivershore mapping unit
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Name: Western North American Sparsely Vegetated Rivershore mapping unit
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MapClass: Western North American Sparsely Vegetated Rivershore mapping unit
ID: Agriculture (w/in the current 5-year cycle)
Name: Agriculture (w/in the current 5-year cycle)
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Name: Agriculture (w/in the current 5-year cycle)
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MapClass: Agriculture (w/in the current 5-year cycle)