Modoc Plateau Vegetation Map With 91 Plant Classes

91 vegetation classes were mapped across the 84,574-acre Applegate area, and 78 classes across the 66,402-acre Eagle Lake area in California. The map was produced using heads-up digitizing on NAIP imagery between 2017 and 2021, with accuracy ratings between 72.4% and 92.2%. It was created by the State of California following FGDC and NVCS protocols.

Use Cases

• Classify Vegetation Type and Alliance/Association levels across 150,976 total mapped acres for ecological monitoring.
• Analyze Percent Cover and Exotics attributes to assess habitat quality and invasive species spread.
• Map Development Disturbance to evaluate human impact on wetland and riparian areas mapped to a 1/4-acre MMU.
• Train a geospatial model to predict vegetation classes using the 1-meter NAIP imagery base and ancillary data sources.

Strengths

• High map accuracy, with Fuzzy Accuracy Assessment ratings up to 92.2% at the Alliance level.
• Detailed classification of 91 distinct vegetation classes in the Applegate area and 78 in the Eagle Lake area.
• Mapping follows Federal Geographic Data Committee (FGDC) and National Vegetation Classification Standards (NVCS) protocols.
• Includes field reconnaissance and accuracy assessment data, enhancing reliability.

Limitations

• Temporal inconsistency in base imagery, using 2016 NAIP for part of the area and 2018 for another.
• Accuracy varies by classification level, with Association level accuracy as low as 72.4% for the 80-100% Correct threshold in the Eagle Lake area.
• Data collection spanned multiple years (2017-2021), so conditions are not from a single snapshot.

Provenance

Source

State of California, produced in collaboration with CDFW VegCAMP.

Collection Method

Heads-up digitizing applied to one-meter NAIP imagery, supported by field reconnaissance and new surveys.

Time Range

Project work performed between 2017 and 2021, using 2016 and 2018 NAIP imagery as base.

Freshness

Data reflects conditions from the 2016-2018 imagery base, with project work through 2021; metadata was updated in 2026.

Geography

Modoc and Lassen Counties, California, covering the Applegate (84,574 acres) and Eagle Lake (66,402 acres) areas.