What are the units of the Atlas GeoTIFF output?

Users can view various indices and composites in the browser or can download the raw output, which comes in two files:

  1. GeoTIFF: This is a 5-layer, 16-bit ortho-rectified GeoTIFF file. A GIS application is needed to open this type of file. The pixel values are proportional to % reflectance, with a pixel value of 32768 being equal to 100% reflectance (65535 is equal to 200% reflectance). In order to extract the reflectance values you will need to divide by 32768.

    Each layer of the GeoTIFF contains a calibrated reflectance map for a particular wavelength band, as follows:  


    • Layer 1 = Blue
    • Layer 2 = Green
    • Layer 3 = Red
    • Layer 4 = Red Edge
    • Layer 5 = Near-Infrared


    • Layer 1 = Green
    • Layer 2 = Red
    • Layer 3 = Red Edge
    • Layer 4 = Near-Infrared


  2. DSM: This is a single layer, floating-point ortho-rectified GeoTIFF file. Each pixel in the file represents the height of the object (i.e. ground, or canopy) at that location, in meters above sea level.

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