Pre-CanLaD v2: Canada Landsat Disturbance (CanLaD) 30-m resolution disturbance detection prior to 1984

Release Date: 
    January 9th, 2026

Overview:
    Pre-CanLaD Version 2 updates Canada's 1965-1984 forest disturbance history dataset initially published by Correia et al. (2024) with enhanced detection methods and improved temporal accuracy.

For complete information, see:
    https://doi.org/10.23687/8d49698f-40f9-40da-b097-a3f4c90adf5a

Data Products
    Four raster layers available:
        - preCanLaD_disturbanceType_v2_20251126.tif 
            - Pixel values are disturbance type:
                - 2 = Fire
                - 3 = Harvest
                - 4 = Insect
        - preCanLaD_disturbanceYear_v2_20251126.tif 
            - Pixel values are disturbance year:
                - 1950-1984 = years
                - 999 = unknown (user should convert this value to 1955)
        - preCanLaD_correctionMask_v2_20251126.tif 
            - Pixel values are data provenance codes:
                - 0 = Pre-CanLaD-only disturbance 
                - 1 = Confirmed fire (manual or confirmed by pre-CanLaD v1 in the original publication) 
                - 11 = Canadian National Fire Database (CNFDB) corrected fire 
                - 12 = NBAC-corrected fire
                - 2 = Confirmed harvest 
        - preCanLaD_updateMask_v2_20251126.tif 
            - Pixel values are version change indicator:
                - 1 = v1 retained
                - 2 = v2 new/updated

Dataset citation

Luc Guindon, David L.P. Correia, Francis Manka and Byron Smiley. 2026. SCANFI v2: Spatialized CAnadian National Forest Inventory data product v2. Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Quebec, Canada. https://doi.org/10.23687/07653869-f303-46c2-a04e-9ab479b73cbf

Data projection
  - proj4
    +proj=lcc +lat_0=0 +lon_0=-95 +lat_1=49 +lat_2=77 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs
  - OGC WKT2:2018
    PROJCRS["NAD_1983_Canada_Lambert",BASEGEOGCRS["NAD83",DATUM["North American Datum 1983",ELLIPSOID["GRS 1980",6378137,298.257222101004,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4269]],CONVERSION["Lambert Conic Conformal (2SP)",METHOD["Lambert Conic Conformal (2SP)",ID["EPSG",9802]],PARAMETER["Latitude of false origin",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8821]],PARAMETER["Longitude of false origin",-95,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8822]],PARAMETER["Latitude of 1st standard parallel",49,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8823]],PARAMETER["Latitude of 2nd standard parallel",77,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8824]],PARAMETER["Easting at false origin",0,LENGTHUNIT["metre",1],ID["EPSG",8826]],PARAMETER["Northing at false origin",0,LENGTHUNIT["metre",1],ID["EPSG",8827]]],CS[Cartesian,2],AXIS["easting",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["northing",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

Reference
    Correia, D.L.P., Guindon, L., and M.A. Parisien. 2024. Extending Canadian Forest Disturbance History Maps Prior to 1985. Ecosphere 15 (8): e4956. https://doi.org/10.1002/ecs2.4956