By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they formed. Soil scientists delineate these repeating patterns of landform segments, or natural bodies, on a map. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. The soils and miscellaneous areas (e.g., Rock outcrop) in a survey area are in an orderly pattern that is related to the geology, landforms, topography, climate, and natural vegetation. Soil mapping is the process of delineating natural bodies of soils, classifying and grouping the delineated soils into map units, and capturing soil property information for interpreting and depicting soil spatial distribution on a map. Revised by Kenneth Scheffe and Shawn McVey, USDA-NRCS.
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