Foto interpretation of vegetation through densitometry

Abstract

The photointerpretatives parameters are very subjective, because each photointerpreter has his own criterion. The objective of the present, work is to evidence the utilization of the densitometry in the interpretation of vegetation. In the study, were used aerial color photographs (transparences 23 x 23 cm) in the scale 1.6.000. The utilized color film was the Kodak Ektachrome MS Aerograpluc Film 2448. Because of the scale sise, was very easy to identify the natural and cultural vegetation. Each type of vegetation was classified by Munsell renovation The optical density was through a WESTON transmission microdensitometer, model 877. For each type of identified vegetation were made densitometric measurements, for later comparation. The obtained data were utilized in the evaluation of the importance of densitometric readings. For the utilized photographs, the main conclusions are: a) the densitometric measurements showed best results comparatively with the convencional photointerpretations; b) the utilization of color infrared film suggest the possibility of a increase in the importance of the densitometric readings.