Search results for "mapping"
showing 10 items of 1508 documents
Development of new plant resources (genetic resources and ril populations) in [i]Vicia faba[/i] L. for genetic studies
2014
BAP GEAPSIBAPGEAPSI; absent
I-Weed robot : un outil pour l'étude de population de plantes adventices
2016
The I-Weed robot is a small autonomous platform that aims to characterize the vegetation in an inter-row maize crop for a spot spraying: spraying is done only where a weed is detected. This article presents how the robot works and aims to experimentally evaluate the ability to map weeds from a WeedSeeker system (Trimble) embedded on the I-Weed robot. The results are compared to those from an imaging system, used as ground truth. After analyzing a confusion matrix, it reveals that the system is able to correctly geotag plants at 75 % and is ready for a spot spraying.
Cartographie de la diversité des sols viticoles de versant par imagerie à haute résolution : contribution à la connaissance des terroirs
2014
The Burgundian vineyard hillslopes (Côte-d’Or, France) exhibit a high diversity of soils resulting from the combination of several natural and anthropogenic factors acting at various spatio-temporal scales. The soil types have major role in viticulture, since they partly determine wine-growing quality. However, soil undergoes important degradation caused by hydric erosion and vineyard management practices. To control this soil heritage for a sustained viticulture in Côte-d’Or, a better knowledge of soil is necessary. The objectives of this work is to characterise vineyard soils and to identify the factors governing their diversity using an interdisciplinary approach crossing geology, geomor…
Mapping soil and substratum at a very high spatial resolution in the hillslope of Couchey (France)
2012
International audience; In this work, we present a method based on very high spatial resolution (VHSR) aerial images acquired in the visible domain and that map soil surface diversity at the hillslope scale with a spatial resolution of a few centimeters. This method combines aerial VHSR image classification with local soil sampling. Principal component analysis (PCA) and non-supervised classification was performed on image characteristics to define soil surface characteristic classes (SSC). Then soil surface mapping was combined with soil surface descriptions and soil profiles to define soil types by physical and chemical characteristics. As soil results from parent material alteration, ide…
Information Spatiale et Archéologie
2011
L'information archéologique est spatiale par nature. Quels que soient l'échelle (fouille, habitat, ville, région), le contexte (urbain, rural), le thème (peuplement, territoires, matières premières, réseaux d'échanges, culture matérielle...) ou la démarche (terrain, documentation), la localisation est une donnée fondamentale et la production de documents (carto) graphiques est une constante. Pour autant, si le positionnement dans l'espace est un préliminaire indispensable, il ne constitue pas à lui seul une réflexion sur la dimension spatiale des questions archéologiques. L'application des méthodes de l'analyse spatiale est intervenue en archéologie dès les années 1970. Elle est maintenant …
ArchaeOres : un projet de serveur numérique pour l'étude des données archéologiques et environnementales à références spatiales
1999
http://f-origin.hypotheses.org/wp-content/blogs.dir/1082/files/2013/05/AGER9.pdf; National audience
Complémentarité des données de télédétection pour l'analyse des transformations de l'occupation du sol dans des zones humides urbaines. Application a…
2008
International audience; Dans le cadre d'un programme ECOS-Nord, notre étude analyse les transformations récentes de l'occupation du sol sur deux zones humides urbaines : les hortillonnages d'Amiens et les chinampas de Mexico. Malgré des contextes différents, ces deux espaces sont les supports d'usages et de dynamiques très similaires : des techniques identiques d'agriculture sur l'eau et un déclin de l'activité agricole au XXe siècle au profit de celle des loisirs. L'objectif est double : identifier et quantifier les changements sur chacun des sites, puis les confronter de façon à mettre en évidence les points communs et les spécificités locales, tant dans la nature des changements, que dan…
"La musique du paysage": une écriture paysagère guyanienne
2014
National audience; This chapter introduces Wilson Harris's work to lay readers, with specific emphasis on landscape writing and the combination of real and symbolical spaces in Harris's novels. It also elaborates on issues tackled by Fred D'Aguiar's essay about Harris, a translation of which is included in the same volume.
Progress and prospects of Catalyse tools Integration.
2008
The Catalyse toolkit, within the framework of the caENTI project, will give place before February, 2009 to a complete integration of its diverse components to become the part tools of the community system of territorial intelligence (TICS). The object of this presentation is to place the progress of its works, and to position the stages to come.
On improving the accuracy of Visible Light Positioning system using deep autoencoder
2020
International audience; DC-biased optical Orthogonal Frequency DivisionMultiplexing (DCO-OFDM)-based visible light positioning (VLP)technology along with the Received Signal Strength(RSS) po-sitioning algorithm is widely used to achieve centimeter levelpositioning accuracy for incoming 5G era, especially indoorenvironment. However, the DCO-OFDM has the peak-to-averagepower ratio (PAPR) issue which imposes the nonlinear distortionand it will directly affect the positioning accuracy in the VLPsystem. The PAPR reduction scheme is urgently needed. There-fore, in this paper, the impact of PAPR reduction scheme onpositioning accuracy is investigated. The positioning accuracywith and without the s…