How can i measure topographic mask in a hemispherical photograph?

29 January 2015 1 9K Report

I have some hemispherical photograph from forest canopy. the study site has slope and is tilted. I used Gap Light Analyzer 2 for analyses the photographs but in the Calculation Report, the %mask area is too low (~ 0), while i can see topographic mask in the photos. so why? and what is wrong with me?

Ardalan Daryaei

Dear Sean Haughian

Thank you so much for your valuable comments.

I think your second comment is accordance with some of my photos.

About the mask scale: in the calculation report and user manual the scale is (%), moreover for example when sky area is 99.9%, the mask is 0.1 hence I think the scale is (%)

Best regards, Ardalan

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