Abstract
Abstract Adoption by the aerial photography industry of automated electronic dodging and printing techniques, associated with a shift to low-contrast negatives to suit photogrammetric applications, has seriously impaired the tonal contrast essential to medium-scale black and white infrared forest photography. In comparisons of various types of 1:15, 840 coverage of a representative forested area, experienced interpreters agreed that tonal quality of photography conventionally provided in Minnesota could be improved by using a Zeiss C filter, holding film exposure slightly below normal, processing to a contrasty negative, and printing on medium contrast paper.
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