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Mapping Accuracy of a Contemporary Soil Survey in an Urbanizing Area
Author(s) -
Amos D. F.,
Whiteside E. P.
Publication year - 1975
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1975.03615995003900050038x
Subject(s) - transect , homogeneity (statistics) , geography , cartography , soil map , physical geography , soil survey , hydrology (agriculture) , environmental science , soil science , geology , statistics , mathematics , soil water , oceanography , geotechnical engineering
Mapping unit homogeneity was determined by the point‐intercept transect method for 12 mapping units representing nearly 60% of the land area in a contemporary soil survey of an urbanizing county in south‐central Michigan. By assigning a contrast value to each inclusion a “weighted contrast value” was established for each unit permitting a comparison of homogeneity among the units. Comparison of Miami drainage‐sequence map units revealed a deficiency in the concept of the moderately well drained member. At the series level “observation‐mapping unit agreement” improved an average of 22% when the mapping units were renamed to more accurately reflect their actual composition. Continuing refinement of taxa together with increased interpretive demand on the cartographic delineation would seem to necessitate quantification of mapping units in subsequent soil surveys.