What are the units of the Atlas GeoTiff output?

Once your processing job is complete, you can view the RGB imagery and an NDVI map live in your browser, or you 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).

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

    RedEdge

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

    Sequoia

    • 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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