Numerical classification of soils and its application in survey:
Saved in:
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Wageningen
1977
|
| Series: | Agricultural research reports
855 Soil survey papers 12 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Item Description: | Zugl.: Wageningen, Landbouwhogeschool, Diss., 1977 |
| Physical Description: | 117 S. graph.Darst. 5 Beil. |
| ISBN: | 9022006085 |
Staff View
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Record in the Search Index
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|---|---|
| adam_text | Contents
1 Introduction
2 General problems of soil classification
2.1 Purposes of soi] classification 3
2.2 Data collection 5
2.2.1 Choice of variables 6
2.2.2 Choice of profiles 7
2.3 Data pre-processing 8
2.3.1 Data transformation 8
2.3.1.1 Transformation of nominal and ordinal variables 10
2.3.1.2 Transformation of metrical variables; weighting 11
2.3.2 Data reduction 13
2.3.2.1 Reduction of the number of variables 13
2.3.2.2 Reduction of the number of objects 14
2.4 Major types of classification 14
2.4.1 Intrinsic versus extrinsic 15
2.4.2 Distribution fitting versus homogeneity optimizing 15
2.4.3 Fuzzy, overlapping or disjoint classes 16
2.4.4 Hierarchic versus non-hierarchic 16
2.4.5 Monothetic versus polythetic 17
2.5 Identification 18
2.6 Assessment of classifications 19
2.6.1 Direct subjective assessment 19
2.6.2 Stability of the result 19
2.6.3 Assessment by mathematical criteria 20
2.6.3.1 Criteria for hierarchical classifications 20
2.6.3.2 Criteria for non-hierarchical classifications 22
2.6.4 Discussion 22
3 Choosing a numerical method for soil classification 25
3.1 Introduction 25
3.2 Heuristic approach 26
3.2.1 Similarity coefficients 26
3.2.1.1 Correlation coefficient 26
3.2.1.2 Association coefficients 27
3.2.1.3 General similarity coefficient of Gower 28
3.2.1.4 Canberra metric 29
3.2.1.5 Coefficient of Bray and Curtis 29
3.2.1.6 Minkowski metrics 30
3.2.1.7 Mean Character Difference 30
3.2.1.8 Euclidean distance 32
3.2.1.9 Mahalanobis generalized distance 34
3.2.2 Methods of analysis 35
3.2.2.1 Hierarchical methods 35
3.2.2.2 Non-hierarchical methods 38
3.3 Imposing mathematical requirements 39
3.4 Approach by objective functions 40
3.4.1 Objective functions 40
3.4.1.1 Functions related with homogeneity 41
3.4.1.2 Functions for separating populations 42
3.4.1.3 Other objectives and objective functions 43
3.4.2 Side conditions 43
3.4.2.1 Number of classes 43
3.4.2.2 Geographic fragmentation of the classes 44
3.4.3 Optimization 45
3.4.3.1 Exact solution 46
3.4.3.2 Approximate solution 47
4 Experiments with a classification procedure 51
4.1 Outline and rationale of the procedure 51
4.2 Detailed description and application 55
4.2.1 Purpose of the classification 55
4.2.2 Data collection 56
4.2.2.1 Test area 56
4.2.2.2 Profiles 56
4.2.2.3 Variables 56
4.2.3 Data pre-processing 59
4.2.3.1 Reduction of the number of profiles 59
4.2.3.2 Reduction of the number of variables 59
4.2.3.3 Weighting of the variables 62
4.2.4 Classification at the first stage of the procedure 63
4.2.4.1 Special classifications 63
4.2.4.2 Synthesis; interim classification 70
4.2.5 Classification at the second stage of the procedure 70
4.2.5.1 Method 70
4.2.5.2 Final classification 72
4.2.6 Geographical distribution of the classes 73
4.3 Some technical aspects of the procedure 74
4.3.1 Sample size 74
4.3.2 Initial partition 76
4.3.3 Order dependence of the solution 79
4.3.4 Choice of the number of classes and weights 80
4.3.4.1 Problem 80
4.3.4.2 Method 81
4.3.4.3 Results and conclusions 81
5 Conclusion 101
Summary 104
Samenvatting 108
References 112
Appendices 1 —5
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| dewey-full | 631.44 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 631 - Techniques, equipment & materials |
| dewey-raw | 631.44 |
| dewey-search | 631.44 |
| dewey-sort | 3631.44 |
| dewey-tens | 630 - Agriculture and related technologies |
| discipline | Agrar-/Forst-/Ernährungs-/Haushaltswissenschaft / Gartenbau Geographie |
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| indexdate | 2024-07-09T15:38:37Z |
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| isbn | 9022006085 |
| language | English |
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| physical | 117 S. graph.Darst. 5 Beil. |
| publishDate | 1977 |
| publishDateSearch | 1977 |
| publishDateSort | 1977 |
| record_format | marc |
| series | Agricultural research reports Soil survey papers |
| series2 | Agricultural research reports Soil survey papers |
| spelling | Gruijter, J. J. de Verfasser aut Klassifikation von Böden und ihre Anwendung in der Bodenkartierung ger Numerical classification of soils and its application in survey Wageningen 1977 117 S. graph.Darst. 5 Beil. txt rdacontent n rdamedia nc rdacarrier Agricultural research reports 855 Soil survey papers 12 Zugl.: Wageningen, Landbouwhogeschool, Diss., 1977 Soil surveys Soils Classification Boden (DE-588)4007348-8 gnd rswk-swf Klassifikation (DE-588)4030958-7 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Boden (DE-588)4007348-8 s Klassifikation (DE-588)4030958-7 s DE-604 Agricultural research reports 855 (DE-604)BV035361765 855 Soil survey papers 12 (DE-604)BV001898572 12 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=001303061&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Gruijter, J. J. de Numerical classification of soils and its application in survey Agricultural research reports Soil survey papers Soil surveys Soils Classification Boden (DE-588)4007348-8 gnd Klassifikation (DE-588)4030958-7 gnd |
| subject_GND | (DE-588)4007348-8 (DE-588)4030958-7 (DE-588)4113937-9 |
| title | Numerical classification of soils and its application in survey |
| title_auth | Numerical classification of soils and its application in survey |
| title_exact_search | Numerical classification of soils and its application in survey |
| title_full | Numerical classification of soils and its application in survey |
| title_fullStr | Numerical classification of soils and its application in survey |
| title_full_unstemmed | Numerical classification of soils and its application in survey |
| title_short | Numerical classification of soils and its application in survey |
| title_sort | numerical classification of soils and its application in survey |
| topic | Soil surveys Soils Classification Boden (DE-588)4007348-8 gnd Klassifikation (DE-588)4030958-7 gnd |
| topic_facet | Soil surveys Soils Classification Boden Klassifikation Hochschulschrift |
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