Resumo:
This paper deals with the crowns count of Paraná pine as observed on vertical aerial 2:80.000 B&W conventional and 1:2.033 color 35 mm photographys. The study area, known as “Capão da Imbuia” has 3,8 hectares and is located in the urban area of Curitiba city. The photo interpretations were carried out by three interpreters with different technical knowledgment in the subject. The results were compared, qualitative and quantitativelly, with two maps elaborated with data collected by field work asd showing the spatial and the crown position of 194 Paraná pine found in the area, from which 145 could be delineated on the photographs. Each crown delineated on the photos was analysed with the ground truth maps. The interpreters did not delineated all the same Parana pine crowns, the differences are related with the shape, size and number of crowns and with the degree of generelization in the dense crown areas. The average results was 62,3% and 12,4% using the 1:203 and 1:8.000 scales, respectivelly. As observed from the color photographs, 45.4% of the study area covered by Paraná pine crowns either on single or dense areas. Interpreters with few background in photo-interpretation can be used to delineate Paraná pine using color aerial photographs with scales around 1:2.000.
