Zenith Divisions

This screen allows users to control how the measurement is separated in zenith divisions, and select the area to be measured. Zenith divisions are represented as rings in the hemispherical picture.

Number of Zenith Divisions

This field indicates how measurement data will be divided. Measurements can automatically be split into up to 10 zenith divisions.

Excluded Area

These fields indicate which part of the camera image should be measured. The area masked in blue will be excluded. In addition to using the slider controls users can select using their finger by sliding a finger clockwise over the area to exclude, or counter clockwise over the area to exclude.

For more information on how azimuth and zenith divisions influence LAI estimation:

Canadian Journal of Forest Research, volume 40, pages 1588-1603, 2010.
Gonsamo, A., Walter, J., Pellikka, P.