A Classification for a Geostatistical Index of Spatial Dependence
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Brasileira de Ciência do Solo (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100313 |
Resumo: | ABSTRACT: In geostatistical studies, spatial dependence can generally be described by means of the semivariogram or, in complementary form, with a single index followed by its categorization to classify the degree of such dependence. The objective of this study was to construct a categorization for the spatial dependence index (SDI) proposed by Seidel and Oliveira (2014) in order to classify spatial variability in terms of weak, moderate, and strong dependence. Theoretical values were constructed from different degrees of spatial dependence, which served as a basis for calculation of the SDI. In view of the form of distribution and SDI descriptive measures, we developed a categorization for posterior classification of spatial dependence, specific to each semivariogram model. The SDI categorization was based on its median and 3rd quartile, allowing us to classify spatial dependence as weak, moderate, or strong. We established that for the spherical semivariogram: SDISpherical (%) ≤ 7 % (weak spatial dependence), 7 % < SDISpherical (%) ≤ 15 % (moderate spatial dependence), and SDISpherical (%) > 15 % (strong spatial dependence); for the exponential semivariogram: SDIExponential (%) ≤ 6 % (weak spatial dependence), 6 % < SDIExponential (%) ≤ 13 % (moderate spatial dependence), SDIExponential (%) > 13 % (strong spatial dependence); and for the Gaussian semivariogram: SDIGaussian (%) ≤ 9 % (weak spatial dependence), 9 % < SDIGaussian (%) ≤ 20 % (moderate spatial dependence), and SDIGaussian (%) > 20 % (strong spatial dependence). The proposed categorization allows the user to transform the numerical values calculated for SDI into categories of variability of spatial dependence, with adequate power for explanation and comparison. |
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A Classification for a Geostatistical Index of Spatial Dependencegeostatisticsspatial dependencespatial variabilitysemivariogramsummary measuresABSTRACT: In geostatistical studies, spatial dependence can generally be described by means of the semivariogram or, in complementary form, with a single index followed by its categorization to classify the degree of such dependence. The objective of this study was to construct a categorization for the spatial dependence index (SDI) proposed by Seidel and Oliveira (2014) in order to classify spatial variability in terms of weak, moderate, and strong dependence. Theoretical values were constructed from different degrees of spatial dependence, which served as a basis for calculation of the SDI. In view of the form of distribution and SDI descriptive measures, we developed a categorization for posterior classification of spatial dependence, specific to each semivariogram model. The SDI categorization was based on its median and 3rd quartile, allowing us to classify spatial dependence as weak, moderate, or strong. We established that for the spherical semivariogram: SDISpherical (%) ≤ 7 % (weak spatial dependence), 7 % < SDISpherical (%) ≤ 15 % (moderate spatial dependence), and SDISpherical (%) > 15 % (strong spatial dependence); for the exponential semivariogram: SDIExponential (%) ≤ 6 % (weak spatial dependence), 6 % < SDIExponential (%) ≤ 13 % (moderate spatial dependence), SDIExponential (%) > 13 % (strong spatial dependence); and for the Gaussian semivariogram: SDIGaussian (%) ≤ 9 % (weak spatial dependence), 9 % < SDIGaussian (%) ≤ 20 % (moderate spatial dependence), and SDIGaussian (%) > 20 % (strong spatial dependence). The proposed categorization allows the user to transform the numerical values calculated for SDI into categories of variability of spatial dependence, with adequate power for explanation and comparison.Sociedade Brasileira de Ciência do Solo2016-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100313Revista Brasileira de Ciência do Solo v.40 2016reponame:Revista Brasileira de Ciência do Solo (Online)instname:Sociedade Brasileira de Ciência do Solo (SBCS)instacron:SBCS10.1590/18069657rbcs20160007info:eu-repo/semantics/openAccessSeidel,Enio JúniorOliveira,Marcelo Silva deeng2016-12-13T00:00:00Zoai:scielo:S0100-06832016000100313Revistahttp://www.scielo.br/scielo.php?script=sci_serial&pid=0100-0683&lng=es&nrm=isohttps://old.scielo.br/oai/scielo-oai.php||sbcs@ufv.br1806-96570100-0683opendoar:2016-12-13T00:00Revista Brasileira de Ciência do Solo (Online) - Sociedade Brasileira de Ciência do Solo (SBCS)false |
dc.title.none.fl_str_mv |
A Classification for a Geostatistical Index of Spatial Dependence |
title |
A Classification for a Geostatistical Index of Spatial Dependence |
spellingShingle |
A Classification for a Geostatistical Index of Spatial Dependence Seidel,Enio Júnior geostatistics spatial dependence spatial variability semivariogram summary measures |
title_short |
A Classification for a Geostatistical Index of Spatial Dependence |
title_full |
A Classification for a Geostatistical Index of Spatial Dependence |
title_fullStr |
A Classification for a Geostatistical Index of Spatial Dependence |
title_full_unstemmed |
A Classification for a Geostatistical Index of Spatial Dependence |
title_sort |
A Classification for a Geostatistical Index of Spatial Dependence |
author |
Seidel,Enio Júnior |
author_facet |
Seidel,Enio Júnior Oliveira,Marcelo Silva de |
author_role |
author |
author2 |
Oliveira,Marcelo Silva de |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Seidel,Enio Júnior Oliveira,Marcelo Silva de |
dc.subject.por.fl_str_mv |
geostatistics spatial dependence spatial variability semivariogram summary measures |
topic |
geostatistics spatial dependence spatial variability semivariogram summary measures |
description |
ABSTRACT: In geostatistical studies, spatial dependence can generally be described by means of the semivariogram or, in complementary form, with a single index followed by its categorization to classify the degree of such dependence. The objective of this study was to construct a categorization for the spatial dependence index (SDI) proposed by Seidel and Oliveira (2014) in order to classify spatial variability in terms of weak, moderate, and strong dependence. Theoretical values were constructed from different degrees of spatial dependence, which served as a basis for calculation of the SDI. In view of the form of distribution and SDI descriptive measures, we developed a categorization for posterior classification of spatial dependence, specific to each semivariogram model. The SDI categorization was based on its median and 3rd quartile, allowing us to classify spatial dependence as weak, moderate, or strong. We established that for the spherical semivariogram: SDISpherical (%) ≤ 7 % (weak spatial dependence), 7 % < SDISpherical (%) ≤ 15 % (moderate spatial dependence), and SDISpherical (%) > 15 % (strong spatial dependence); for the exponential semivariogram: SDIExponential (%) ≤ 6 % (weak spatial dependence), 6 % < SDIExponential (%) ≤ 13 % (moderate spatial dependence), SDIExponential (%) > 13 % (strong spatial dependence); and for the Gaussian semivariogram: SDIGaussian (%) ≤ 9 % (weak spatial dependence), 9 % < SDIGaussian (%) ≤ 20 % (moderate spatial dependence), and SDIGaussian (%) > 20 % (strong spatial dependence). The proposed categorization allows the user to transform the numerical values calculated for SDI into categories of variability of spatial dependence, with adequate power for explanation and comparison. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100313 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100313 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/18069657rbcs20160007 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Ciência do Solo |
publisher.none.fl_str_mv |
Sociedade Brasileira de Ciência do Solo |
dc.source.none.fl_str_mv |
Revista Brasileira de Ciência do Solo v.40 2016 reponame:Revista Brasileira de Ciência do Solo (Online) instname:Sociedade Brasileira de Ciência do Solo (SBCS) instacron:SBCS |
instname_str |
Sociedade Brasileira de Ciência do Solo (SBCS) |
instacron_str |
SBCS |
institution |
SBCS |
reponame_str |
Revista Brasileira de Ciência do Solo (Online) |
collection |
Revista Brasileira de Ciência do Solo (Online) |
repository.name.fl_str_mv |
Revista Brasileira de Ciência do Solo (Online) - Sociedade Brasileira de Ciência do Solo (SBCS) |
repository.mail.fl_str_mv |
||sbcs@ufv.br |
_version_ |
1752126520851169280 |