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Density - Snags - 40" or Greater
The number of standing dead trees (snags) on the landscape is important to forest managers; high densities of standing dead trees are known to contribute to extreme fire events... -
Southern CA - Large Tree Density > 30" Dbh
Large trees are important to forest managers as they have a greater likelihood of survival from fire, provide sources of seed stock, wildlife habitat, and contribute to other... -
Basal Area
Basal area (BA) is a common forest structure measurement that provides a useful index of forest and habitat condition. Basal area is the cross-sectional area of the bole of a... -
Northern Spotted Owl Habitat; Topo-Climatic Fire Refugia
Maps that represent the relative probability of fire refugia generated from an empirical model trained on the aggregate history (1985-2019) of wildfire severity, topographical... -
Marbled Murrelet Critical Habitat
This data layer depicts lands designated as critical habitat under section 4 of the Endangered Species Act for the Marbled Murrelet in California. Critical habitat is the... -
SDI: Stand Density Index - Zeide 1983
Stand density index (SDI) helps vegetation managers to identify levels of site utilization and competition to determine management scenarios to meet objectives and is often used... -
Gold-Spotted Borer Presence and Rate of Spread
Tree mortality and other forest damage is detected by annual aerial surveys over forested lands by state and federal agency staff. The primary purpose of the aerial survey is to... -
Northern California Winter Steelhead Distribution
Winter Steelhead Distribution June 2012 Version This dataset depicts observation-based stream-level geographic distribution of anadromous winter-run steelhead trout,... -
Pacific Fisher Suitable Habitat
The Pacific fisher population in the southern Sierra is federally listed **** as a threatened population and resides primarily on National Forest System lands. Habitat... -
Wildlife Species Richness
Native species richness is estimated based on high suitability reproductive habitat for a given species. Reproductive habitat is used to represent suitability because it is... -
Asian Population Concentration - Sierra Nevada
Relative concentration of the Sierra Nevada region's Asian American population. The variable ASIANALN records all individuals who select Asian as their SOLE racial identity in... -
Biomass Residues
This raster layer represents forest residues for the state of California in 2018. It was developed by the Schatz Energy Research Center as part of the C-BREC (California Biomass... -
Northern CA - Large Tree Density - 30" - 40" Dbh
Large trees are important to forest managers for multiple reasons: they have a greater likelihood of survival from fire; they are an important source of seed stock; they provide... -
Low Income Population Concentration - Sierra Nevada
Relative concentration of the estimated number of people in the Sierra Nevada region that live in a household defined as "low income." There are multiple ways to define low... -
American Indian or Alaska Native Race Alone and Multi-Race Population...
Relative concentration of the Northern California region's American Indian population. The variable AIANALN records all individuals who select American Indian or Alaska Native... -
Ignition Cause -1992-2020 - Human Cause
These rasters depict the predicted human- and lightning-caused ignition probability for the state of California. Ignition is regulated by complex interactions among climate,... -
Northern Spotted Owl Suitable Habitat
These data are derived using analysis described in Glenn et al. (2017). The authors have **** developed a landscape-scale model to predict the distribution and density of the... -
Hispanic and Latino Population Concentration - Northern CA
Relative concentration of the Northern California region's Hispanic/Latino population. The variable HISPANIC records all individuals who select Hispanic or Latino in response to... -
Fire Return Interval Departure (Frid) - Current Fire Return Interval - Since 1908
The fire return interval departure (FRID) analysis quantifies the difference between current and pre-settlement fire frequencies, allowing managers to target areas at high risk... -
Sierra Nevada - Large Tree Density - 24" - 30" Dbh
Large trees are important to forest managers for multiple reasons: they have a greater likelihood of survival from fire; they are an important source of seed stock; they provide...