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Density Slicing Techniques for Soil Survey¹

ABSTRACT

A density slicing system is used by experienced soil surveyors to interpret photographic tone patterns associated with soils of the Lake Dakota Plain area of north-central South Dakota. The density slicing system color encodes the variation in optical density of film transparencies and measures the percent area of each color encoded density level. Field checking verified that the soil boundaries were more accurately located on the color encoded density maps than on the existing soil maps of the area.

¹ Contribution from Remote Sensing Institute and Plant Science Department, South Dakota State Univ., Brookings. Presented before Div. S-5, Soil Sci. Soc. of Amer. meetings, Aug. 17, 1971, New York City, N.Y. Approved for publication by the Director of the South Dakota Agr. Exp. Sta. as Journal Series no. 1058. Work performed under NASA contract NGL 42-003-007.

² Assistant Professor, Plant Science Dep.; Director, Remote Sensing Institute; and Professor, Plant Science Dep., respectively, South Dakota State Univ., Brookings, S.D., 57006.

Received for publication December 16, 1971. Accepted for publication March 23, 1972.