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Proceedings Paper

Primary discussion on the relationship between spatial distributions of fuzzy slope positions and soil types
Author(s): Cheng-Zhi Qin; A-Xing Zhu; Lin Yang; Bao-Lin Li; Tao Pei
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Paper Abstract

As one of key factors which control the spatial soil variation in soil-landscape model, terrain information includes not only topographic attributes (such as slope gradient, curvature, etc.) but also information of slope positions. But the spatial gradation of slope positions is still not quantitatively considered in current predictive soil mapping and other related application areas. The issue of this paper is to make a primary discussion on the potential role of spatial gradation of slope positions in soil-landscape model. Taking a study area in Northeast China and a detailed taxonomy of slope position, this paper firstly utilized a fuzzy inference approach based on similarity to the typical locations to quantify the spatial gradation between slope positions. Secondly, we took use of the soil-subgroup map in study area to analyze whether there is an evident relationship between soil distribution and spatial gradation of slope positions or not, by means of the statistics on the percentage of slope positions on where each soil subgroup in study area is distributed. The results show that the distributions between slope positions and soil subgroups are clearly correlative in the areas where fuzziness as one certain slope position is little. And the soil distribution shows obvious intergradation and uncertainty in areas where the slope position is identified with much ambiguity. The evident relationship between soil distribution and spatial gradation of slope positions indicates that the quantitative information of spatial gradation of slope positions should be included into both soil-landscape model and its applications (e.g., digital soil mapping, etc.), for a better depiction on the co-variation between slope positions and soil type.

Paper Details

Date Published: 10 November 2008
PDF: 8 pages
Proc. SPIE 7146, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses, 71460Z (10 November 2008); doi: 10.1117/12.813126
Show Author Affiliations
Cheng-Zhi Qin, Institute of Geographical Sciences and Natural Resources Research (China)
A-Xing Zhu, Institute of Geographical Sciences and Natural Resources Research (China)
Univ. of Wisconsin-Madison (United States)
Lin Yang, Institute of Geographical Sciences and Natural Resources Research (China)
Graduate School of the Chinese Academy of Sciences (China)
Bao-Lin Li, Institute of Geographical Sciences and Natural Resources Research (China)
Tao Pei, Institute of Geographical Sciences and Natural Resources Research (China)


Published in SPIE Proceedings Vol. 7146:
Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses
Lin Liu; Xia Li; Kai Liu; Xinchang Zhang, Editor(s)

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