Disaggregation of legacy soil data using area to point kriging for mapping soil organic carbon at the regional scale

Geoderma
Ruth KerryBen P Marchant

Abstract

Legacy data in the form of soil maps, which often have typical property measurements associated with each polygon, can be an important source of information for digital soil mapping (DSM). Methods of disaggregating such information and using it for quantitative estimation of soil properties by methods such as regression kriging (RK) are needed. Several disaggregation processes have been investigated; preferred methods include those which include consideration of scorpan factors and those which are mass preserving (pycnophylactic) making transitions between different scales of investigation more theoretically sound. Area to point kriging (AtoP kriging) is pycnophylactic and here we investigate its merits for disaggregating legacy data from soil polygon maps. Area to point regression kriging (AtoP RK) which incorporates ancillary data into the disaggre-gation process was also applied. The AtoP kriging and AtoP RK approaches do not involve collection of new soil measurements and are compared with disaggregation by simple rasterization. Of the disaggregation methods investigated, AtoP RK gave the most accurate predictions of soil organic carbon (SOC) concentrations (smaller mean absolute errors (MAEs) of cross-validation) for disag...Continue Reading

Citations

Feb 3, 2016·Environmental Monitoring and Assessment·Ruimin LiuZhenyao Shen
Nov 25, 2016·Environmental Health : a Global Access Science Source·Trang VoPhamFrancine Laden
Sep 13, 2013·TheScientificWorldJournal·Weidong LiMichael R Willig

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