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Assessment of regression kriging for spatial interpolation: comparisons of seven GIS interpolation methods / Qingmin Meng in Cartography and Geographic Information Science, vol 40 n° 1 (January 2013)  

Public [article]  inCartography and Geographic Information Science > vol 40 n° 1 (January 2013) . - pp 28 - 39 Titre : Assessment of regression kriging for spatial interpolation: comparisons of seven GIS interpolation methods Type de document : Article/Communication Auteurs : Qingmin Meng, Auteur ; Zhijun Liu, Auteur ; Bruce E. Borders, Auteur Année de publication : 2013 Article en page(s) : pp 28 - 39 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes descripteurs IGN] analyse comparative [Termes descripteurs IGN] interpolation spatiale [Termes descripteurs IGN] krigeage [Termes descripteurs IGN] lissage de données [Termes descripteurs IGN] régression [Termes descripteurs IGN] système d'information géographique Résumé : (Auteur) As an important GIS function, spatial interpolation is one of the most often used geographic techniques for spatial query, spatial data visualization, and spatial decision-making processes in GIS and environmental science. However, less attention has been paid on the comparisons of available spatial interpolation methods, although a number of GIS models including inverse distance weighting, spline, radial basis functions, and the typical geostatistical models (i.e. ordinary kriging, universal kriging, and cokriging) are already incorporated in GIS software packages. In this research, the conceptual and methodological aspects of regression kriging and GIS built-in interpolation models and their interpolation performance are compared and evaluated. Regression kriging is the combination of multivariate regression and kriging. It takes into consideration the spatial autocorrelation of the variable of interest, the correlation between the variable of interest and auxiliary variables (e.g., remotely sensed images are often relatively easy to obtain as auxiliary variables), and the unbiased spatial estimation with minimized variance. To assess the efficiency of regression kriging and the difference between stochastic and deterministic interpolation methods, three case studies with strong, medium, and weak correlation between the response and auxiliary variables are compared to assess interpolation performances. Results indicate that regression kriging has the potential to significantly improve spatial prediction accuracy even when using a weakly correlated auxiliary variable. Numéro de notice : A2013-741 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/15230406.2013.762138 En ligne : https://doi.org/10.1080/15230406.2013.762138 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32877 [article]

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Site preparation and competing vegetation control affect loblolly pine long-term productivity in the southern Piedmont/Upper Coastal Plain of the United States / Dehai Zhao in Annals of Forest Science, Vol 66 n° 7 (October - November 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 7 (October - November 2009) . - n° 705 Titre : Site preparation and competing vegetation control affect loblolly pine long-term productivity in the southern Piedmont/Upper Coastal Plain of the United States Titre original : La préparation du terrain et le contrôle de la végétation adventice affectent la productivité à long terme de Pinus taeda dans les stations des Piémonts du sud et des plaines côtières des États-Unis d'Amérique Type de document : Article/Communication Auteurs : Dehai Zhao, Auteur ; Michael Kane, Auteur ; Bruce E. Borders, Auteur ; Mike Harrison, Auteur ; John W. Rheney, Auteur Année de publication : 2009 Article en page(s) : n° 705 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] brûlis [Termes descripteurs IGN] croissance végétale [Termes descripteurs IGN] Etats-Unis [Termes descripteurs IGN] gestion forestière [Termes descripteurs IGN] pesticide [Termes descripteurs IGN] Pinus taeda [Termes descripteurs IGN] production végétale [Vedettes matières IGN] Sylviculture Résumé : (Editeur) A site preparation study was established in 1986 to evaluate the effect of different site preparation treatments on growth and yield of loblolly pine (Pinus taeda L.) plantations on the Piedmont and Upper Coastal Plain regions of the southern United States. Site preparation treatments included: (1) burn only, (2) chop-burn, (3) shear-pile-disk, (4) chop-herbicide-burn, (5) herbicide-burn, and (6) herbicide-burn-herbicide. The data from the available 19 installations at age 21 were analyzed with separate analysis of variance and a multilevel nonlinear mixed-effects modeling approach. The herbicide-burn-herbicide treatment significantly increased average Dbh, height, basal area and volume per hectare compared to all other treatments. The burn only treatment consistently ranked worst and was followed by the chop-burn treatment. The shear-pile-disk and chop-herbicide-burn treatments had similar overall growth pattern, and will approach the same level of pine volume as the herbicide-burn treatment. Loblolly pine mean annual increment in volume (m3 ha−1 y−1 ) at age 21 by treatment were: herbicide-burn-herbicide (17.9), shear-pile-disk (16.1), herbicide-burn (15.9), chop-herbicide-burn (15.4), chop-burn (14.3), and burn (11.2). An additional chop or herbicide treatment to the burn treatment significantly increased loblolly pine yield. Complete control of both herbaceous and woody completion enhanced long-term pine productivity. Numéro de notice : A2009-626 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009055 date de publication en ligne : 02/10/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/07/f08385/f08385.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72829 [article]

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