References of "Prevot, Hugues"
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See detailTraitement des données par le logiciel SAS: introduction au module de base
Carletti, Isabelle; Prevot, Hugues ULg

in Notes de Statistique et d'Informatique (2006), 2006(3),

Cette note constitue une introduction au module de base SAS. Après un bref aperçu de l'environnement de travail SAS et des principes du langage SAS, les étapes DATA et PROC d'un programme SAS sont ... [more ▼]

Cette note constitue une introduction au module de base SAS. Après un bref aperçu de l'environnement de travail SAS et des principes du langage SAS, les étapes DATA et PROC d'un programme SAS sont exposées en plus en détails. [less ▲]

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See detailUtilisation d'un S.I.G. pour la gestion des ressources forestières : exemple d'application à un inventaire forestier régional
Lejeune, Philippe ULg; Lecomte, Hugues; Prevot, Hugues ULg

in Bulletin des Recherches Agronomiques de Gembloux (1993), 28(2-3), 275-286

The development of a Geographic Information System (G.I.S.) leads to new prospects in the field of broad-scale forest inventory, the main objective being to estimate areas and growing stock for the ... [more ▼]

The development of a Geographic Information System (G.I.S.) leads to new prospects in the field of broad-scale forest inventory, the main objective being to estimate areas and growing stock for the different stand types in a given region. The dot grid method typically used to estimate the areas in the case of systematic sampling, can be advantageously replaced by the creation within a G.I.S., of a stand map, that can be overlaid with data issued from the inventory. A methodology is proposed, to produce such a map using color infrared aerial photos at a scale of 1:25,000. Geographical data are processed using ILWIS software. The method has been tested on a 200 km² forest area. The error rate for interpretation of stand types is less than 6 % if one considers the confusions between species. The crossing of this stand map with the sample plots layer provides an estimation of the growing stock per stand type. [less ▲]

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