JOURNAL OF NATURAL RESOURCES ›› 2012, Vol. 27 ›› Issue (1): 163-175.doi: 10.11849/zrzyxb.2012.01.017

• Special Forum • Previous Articles    

Research Progress in Soil Property Interpolators and Their Accuracy

SHI Wen-jiao1, YUE Tian-xiang1, SHI Xiao-li2,3, SONG Wei1   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. College of Resources and Environmental Sciences, Hebei Normal University, Shijiazhuang 050016, China;
    3. Key Laboratory of Environmental Evolvement and Ecological Construction of Hebei Province, Shijiazhuang 050016, China
  • Received:2011-05-10 Revised:2011-07-20 Online:2012-01-20 Published:2012-01-20

Abstract: Soil property interpolators and their accuracy are regarded as an important topic for the fields of pedometrics and "digital soil". Soil property interpolation is the quantitative monitoring method for spatio-temporal change of soil, and their accuracy is one of the important future research considerations in pedometrics. High accuracy of soil property interpolation can support technique for micro-decision of soil available use and environmental protection. This paper introduces six methods for soil property interpolation, including Kriging, IDW, Spline, Bayesian maximum entropy (BME), geographically weighted regression (GWR) and high accuracy surface modeling (HASM), and presents the validation methods and indices for soil property interpolation. Then we identify six methods for improving the performance of soil property interpolation, including selection of interpolator, setting of interpolator parameter, sampling numbers and density, degree and extent, sequence of analysis in library and combination of secondary information. Finally, we present the future research orientation of soil property interpolation from three aspects, including selection of interpolator, indices and secondary information.

Key words: pedometrics, geostatistics, spatial interpolation techniques for soil properties, high accuracy surface modeling (HASM), interpolator accuracy

CLC Number: 

  • S159