WERK-1: Change Detection and Attribution Product

WERK-1 will provide a comprehensive, timely, updatable, and accurate accounting of ecological disturbances and recovery across California, categorized by disturbance type. It will deliver annual maps showing where wildfires, forest management activities, and other disturbances have occurred.

Assessments:

1. Annual quantification of area (both footprint area and activity area) of disturbances by disturbance type, ownership, and ecoregions. Summaries of disturbance and management impacts disaggregated by disturbance type, region, socioeconomic groups, and other factors. 
2. Combine State’s existing management databases (e.g., FACTS, CalMapper, Interagency Treatment Tracking System) with remote sensing data products to enhance tracking state-wide treatment activities. 

Product Specifications:

CHARACTERISTIC	DESCRIPTION	NOTE
Spatial Extent	Statewide	Wall-to-wall
Temporal Extent	Landsat: 2000 – Present Sentinel-2: 2016 – Present	Model spinning may impact on the start year
Temporal Resolution	Annual	May vary depending on state needs
Spatial Resolution	Landsat: 30 meter Sentinel-2: 10 meter
Data Format	Raster
Key Data Layers/Attributes	Time of disturbance Disturbance agent Magnitude of change	The magnitude of change in each spectral band can be used to derive changes in spectral metrics, e.g., ΔNDVI, ΔEVI, ΔNBR
Planned Release	Fall 2026

WERK-2: Land Cover Classification & Mapping Product

WERK-2 will develop updatable, high-resolution land cover classification maps of the six most common land cover types, to improve our understanding of landscape changes throughout California.

Assessments:

1. Analyze temporal changes in land cover and assess its spatiotemporal consistency on local to statewide scales. 
2. Assess performance of high spatial-resolution land cover compared to existing medium-resolution land cover products (e.g., NLCD, LANDFIRE).

Product Specifications:

CHARACTERISTIC	DESCRIPTION	NOTE
Spatial Extent	Statewide	Wall-to-wall
Temporal Extent	2018-Present	NAIP is the primary input data
Temporal Resolution	Biennially	May be available more frequently as data allows
Spatial Resolution	0.6 meters
Data Format	Raster
Key Data Layers/Attributes	Land cover type	Tree height shall be available when LiDAR and NAIP3D are available.
Planned Release	Fall 2026

WERK-3: Individual Tree Monitoring Product

WERK-3 will develop updatable, comprehensive tree canopy maps, with the ability to differentiate between live and dead trees. This will improve our understanding of how disturbances such as drought and fire impact California’s forest ecosystems.

Assessments:

1. Quantify tree density by live/dead status, disaggregated by regions, ownerships, jurisdictions, and/or eco/forest types.
2. Assess uncertainties of individual tree detection and live/dead tree classification for better decision support. 

Product Specifications:

CHARACTERISTIC	DESCRIPTION	NOTE
Spatial Extent	Statewide	Wall-to-wall
Temporal Extent	2018-Present	NAIP is the primary input data
Temporal Resolution	Biennially
Spatial Resolution	0.6 meters
Data Format	Vector & Raster
Key Data Layers/Attributes	Individual tree crown boundary Individual tree crown area (m2) Individual tree height (m) Individual tree live/dead status Tree density (trees/hector) Fraction of tree mortality	Tree height shall be available when LiDAR and NAIP3D are available.
Planned Release	Fall 2026

WERK-4: Built Structure Mapping Product

WERK-4 will develop comprehensive, updatable structure maps, tracing the area, height, and volume of structures across the state (habitable dwellings, accessory structures, and industrial/commercial buildings). This will enable buildings to be accounted for in state-level decision making, including the estimation of fire emissions and various land use applications.

Assessments:

1. Analyze built structure distribution and its changes, disaggregated by region and/or jurisdiction and disturbance type.
2. Explore the potential for enhanced building structure mapping (e.g., structure height and volume) given additional 3D data resources (e.g., LiDAR & NAIP3D).

Product Specifications:

CHARACTERISTIC	DESCRIPTION	NOTE
Spatial Extent	Statewide	Wall-to-wall
Temporal Extent	2018-Present	NAIP is the primary input data
Temporal Resolution	Biennially
Spatial Resolution	0.6 meters
Data Format	Vector & Raster
Key Data Layers/Attributes	Structure footprint Structure footprint area (m2) Structure mean height (m) Structure volume (m3)	Structure height and volume will be available when LiDAR and NAIP3D data are available.
Planned Release	Fall 2026

WERK-5: WERK-Wide Analysis & Assessment Products

These analysis and assessment products will incorporate the four products listed above, together with additional outside data sources, to generate new insights and data products.

Assessments:

1. Enhanced statewide aboveground biomass and its change assessment (WERK 1, 2, 3, and external data)
2. Enhanced fire severity assessment (WERK 1, 2, 4)
3. Enhanced tree die-off detection/quantification and investigation of its underlying drivers (WERK 1, 3)
4. Enhanced assessment of forest management impacts on aboveground biomass
5. Assessment of interactions between disturbance (type and magnitude), forest management, stand density, and heterogeneity (WERK 1, 3) 
6. Enhanced vegetation proximity analysis for built structure and utility distribution lines (WERK 2, 3, 4, and external data). 
7. Assessment of land management impact and effectiveness in targeted ecological domains at relevant scales and thematic areas (WERK 1-4, and external data). 

Product Specifications:

CHARACTERISTIC	DESCRIPTION	NOTE
Spatial Extent	Statewide	Wall-to-wall
Temporal Extent, Temporal/Spatial Resolution, Data Format	Detailed data specification for  each assessment product will be determined down the road.
Planned Release	Winter 2027-Summer 2028

Additional analyses may be sought to support additional monitoring questions related to forest health, wildlife habitat, drought vulnerability, timber volume and value, and the like.