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Polarization of light reflected by grass: modeling using visible-sunlit areas / Bin Yang in Photogrammetric Engineering & Remote Sensing, PERS, vol 86 n° 12 (December 2020)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 86 n° 12 (December 2020) . - pp 745 - 752 Titre : Polarization of light reflected by grass: modeling using visible-sunlit areas Type de document : Article/Communication Auteurs : Bin Yang, Auteur ; Lei Yan, Auteur ; Siyuan Liu, Auteur Année de publication : 2020 Article en page(s) : pp 745 - 752 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes descripteurs IGN] aérosol [Termes descripteurs IGN] canopée [Termes descripteurs IGN] distribution du coefficient de réflexion bidirectionnelle BRDF [Termes descripteurs IGN] ensoleillement [Termes descripteurs IGN] image POLDER [Termes descripteurs IGN] image Terra-MODIS [Termes descripteurs IGN] Leaf Area Index [Termes descripteurs IGN] polarisation [Termes descripteurs IGN] réflectance de surface [Termes descripteurs IGN] réflectance végétale Résumé : (Auteur) The Bidirectional polarization distribution function (BPDF) of land surfaces is important for studies of land surfaces and aerosol. With the availability of a huge number of polarization measurements, several semi-empirical BPDF models have been proposed. However, these models do not pay much attention to canopy structure, which is fundamental for generation of polarization. In this article, we propose a new BPDF model using canopy structure information, which is parameterized by visible-sunlit areas. It is evaluated over grassland using POLDER BPDF and MODIS leaf area index data sets. Experiments suggest that compared to Nadal–Bréon and Litvinov models, the new BPDF model reduces root-mean-square error by 7% and 10%, respectively. The new BPDF model also provides better performance when it is fitted using observations clustered by sun zenith angle. The new BPDF model thus provides an effective tool for the study of land surface polarization. Numéro de notice : A2020-763 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.14358/PERS.86.12.745 date de publication en ligne : 01/12/2020 En ligne : https://doi.org/10.14358/PERS.86.12.745 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96552 [article]

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Effect of tree location on mitigating parking lot insolation / Ivana Bajsanski in Computers, Environment and Urban Systems, vol 56 (March 2016)  

Public [article]  inComputers, Environment and Urban Systems > vol 56 (March 2016) . - pp 59 - 67 Titre : Effect of tree location on mitigating parking lot insolation Type de document : Article/Communication Auteurs : Ivana Bajsanski, Auteur ; Vesna Stojakovic, Auteur ; Marko Jovanovic, Auteur Année de publication : 2016 Article en page(s) : pp 59 - 67 Note générale : bibloiographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] changement climatique [Termes descripteurs IGN] effet d'ombre [Termes descripteurs IGN] ensoleillement [Termes descripteurs IGN] optimisation (mathématiques) [Termes descripteurs IGN] parking [Termes descripteurs IGN] urbanisme [Vedettes matières IGN] Végétation et changement climatique Résumé : (auteur) Urban land used for parking lots can contribute to the effect of overheating, whereas vegetation, especially high growth vegetation (trees), can mitigate this effect. Accordingly, in this paper we propose an algorithm, the inputs to which consist of predetermined parameters of a parking lot's geometry, trees and surrounding buildings, where the shadows help to mitigate the heat. The algorithm optimizes tree locations, aiming to provide maximum overshadowing of the parking lots, while leaving the useable parking area and the parking lot shape intact. The paper focuses on parameterization of elements that are important for this analysis process as well as combinatory calculations. These combinatory calculations are based on solar simulations, which are carried out, and take into account climate and geographical data. The algorithm is applied to several cases, depicting real world examples, as well as those based on design and greening instruction manuals. The results indicate that the tree locations estimated by the algorithm increase parking lot overshadowing, indicating that the algorithm efficiently decreases the negative influence of urban overheating. Numéro de notice : A2016-393 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.compenvurbsys.2015.11.006 date de publication en ligne : 01/12/2015 En ligne : http://dx.doi.org/10.1016/j.compenvurbsys.2015.11.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81210 [article]

A GIS-based site identification for the seasonal storage of solar heating: Promises and pitfalls / Timothy J. Dolney in Transactions in GIS, vol 17 n° 2 (April 2013)  

Public [article]  inTransactions in GIS > vol 17 n° 2 (April 2013) . - pp 247 - 266 Titre : A GIS-based site identification for the seasonal storage of solar heating: Promises and pitfalls Type de document : Article/Communication Auteurs : Timothy J. Dolney, Auteur ; Richard Flarend, Auteur Année de publication : 2013 Article en page(s) : pp 247 - 266 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes descripteurs IGN] chaleur [Termes descripteurs IGN] ensoleillement [Termes descripteurs IGN] Pennsylvanie (Etats-Unis) [Termes descripteurs IGN] site [Termes descripteurs IGN] stockage [Termes descripteurs IGN] système d'information géographique Résumé : (Auteur) This research presents the use of GIS to identify potential locations of the Seasonal Storage of Solar Heating (S3H) within the state of Pennsylvania. The S3H utilizes a large pit to store thermal energy collected during the warm months for later use in the cold months. To maximize its overall efficiency, S3H must be built where several locational parameters occur in unison: abandoned mine lands (AMLs), institutions, soil type, and land use. These parameters were mapped using GIS with potential locations identified through the application of neighborhood statistics. Potential locations were verified through the use of aerial photographs, hillshades, and site visitations. The verification process revealed spatial inaccuracies associated with the AML dataset. As a result, the horizontal positional accuracy of AMLs was tested according to the Geospatial Positioning Accuracy Standards – National Standard for Spatial Data Accuracy (NSSDA). Results indicate larger than expected positional offset for a dataset that is crucial to funding the reclamation of AMLs. Numéro de notice : A2013-173 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01357.x date de publication en ligne : 22/11/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01357.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32311 [article]

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A new 3-D solar radiation model for 3-D city models / Jaroslav Hofierka in Transactions in GIS, vol 16 n° 5 (October 2012)  

Public [article]  inTransactions in GIS > vol 16 n° 5 (October 2012) . - pp 681 - 690 Titre : A new 3-D solar radiation model for 3-D city models Type de document : Article/Communication Auteurs : Jaroslav Hofierka, Auteur ; M. Zlocha, Auteur Année de publication : 2012 Article en page(s) : pp 681 - 690 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes descripteurs IGN] arc [Termes descripteurs IGN] ensoleillement [Termes descripteurs IGN] GRASS [Termes descripteurs IGN] milieu urbain [Termes descripteurs IGN] modèle 3D de l'espace urbain [Termes descripteurs IGN] modèle de transfert radiatif [Termes descripteurs IGN] ombre [Termes descripteurs IGN] rayonnement solaire [Termes descripteurs IGN] voxel Résumé : (Auteur) Estimates of solar radiation distribution in urban areas are often limited by the complexity of urban environments. These limitations arise from spatial structures such as buildings and trees that affect spatial and temporal distributions of solar fluxes over urban surfaces. The traditional solar radiation models implemented in GIS can address this problem only partially. They can be adequately used only for 2-D surfaces such as terrain and rooftops. However, vertical surfaces, such as facades, require a 3-D approach. This study presents a new 3-D solar radiation model for urban areas represented by 3-D city models. The v.sun module implemented in GRASS GIS is based on the existing solar radiation methodology used in the topographic r.sun model with a new capability to process 3-D vector data representing complex urban environments. The calculation procedure is based on the combined vector-voxel approach segmenting the 3-D vector objects to smaller polygon elements according to a voxel data structure of the volume region. The shadowing effects of surrounding objects are considered using a unique shadowing algorithm. The proposed model has been applied to the sample urban area with results showing strong spatial and temporal variations of solar radiation flows over complex urban surfaces. Numéro de notice : A2012-518 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01337.x date de publication en ligne : 22/08/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01337.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31964 [article]

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Using thermal remote sensing in environmental studies / M. Kubiak in Transactions in GIS, vol 16 n° 5 (October 2012)  

Public [article]  inTransactions in GIS > vol 16 n° 5 (October 2012) . - pp 715 - 732 Titre : Using thermal remote sensing in environmental studies Type de document : Article/Communication Auteurs : M. Kubiak, Auteur ; P. Dzieszko, Auteur Année de publication : 2012 Article en page(s) : pp 715 - 732 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes descripteurs IGN] bilan thermique [Termes descripteurs IGN] climat [Termes descripteurs IGN] distribution spatiale [Termes descripteurs IGN] ensoleillement [Termes descripteurs IGN] occupation du sol [Termes descripteurs IGN] Pologne [Termes descripteurs IGN] relief [Termes descripteurs IGN] température au sol [Termes descripteurs IGN] variabilité Résumé : (Auteur) Thermovision is a relatively new method of remote sensing with applications in areas such as military operations, residential monitoring, technological process control and emergency management. Surprisingly, it has not seen much application in environmental studies. The article presents a method of using thermovision for topoclimatic studies. The method is based on the spatial distribution of land surface temperature (LST). The LST distribution indicates the amount of solar energy reaching the Earth surface and depends primarily on terrain shape and land cover types. By analyzing the LST distribution, one can determine spatial topoclimatic variability. The LST derived topoclimatic classification was compared with the theoretical topoclimatic classification based on heat balance. New classes of topoclimates were created and some of the existing types were diversified into more detailed subtypes. The analysis of selected lowland areas in north-western Poland revealed that both land cover and terrain shape characteristics had a significant impact on the LST distribution, contrary to the expectation of land cover characteristics being more important than terrain shape. The article demonstrates the possibilities of using thermovision in environmental research and presents a new method of topoclimate delimitation based on thermal remote sensing data and geographical information systems (GIS) techniques comparing. The LST classification method with conventional methods based on DEM and land cover analysis. Numéro de notice : A2012-521 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01336.x date de publication en ligne : 15/08/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01336.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31967 [article]

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Solar atlas of Berlin / D. Ludwig in GIM international, vol 24 n° 3 (March 2010)

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La maîtrise de l'ensoleillement en architecture / Guy Percevault (1991)

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Ground and aircraft infrared observations over a partially-vegetated area / W.P. Kustas in International Journal of Remote Sensing IJRS, vol 11 n° 3 (March 1990)

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Télédétection et montagne / J.P. Dedieu in Revue de géographie alpine, vol 67 n° 1 (01/01/1989)

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Cartographie par télédétection de la végétation et de l'occupation des sols en région de montagne (l'exemple du centre du Népal) / D. Blamont (01/03/1987)

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Les documents existants produits par l'IGN / M.J. Baduel in XYZ, n° 27 (juin - août 1986)

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Utilisation des modèles numériques de terrain pour le "droit au soleil" : étude conjointe IGN-CSTB de solarisation cartographique / Pierre Cormier in Bulletin d'information de l'Institut géographique national, n° 51 (mars 1985)

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Intégration de données énergétiques dans les documents d'urbanisme / L. Bourdeau (1984)

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Cartographie automatique du coefficient d'ensoleillement F2 / Ghazi Qussous (1983)

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La cartographie automatique de l'ensoleillement / Khalil Salameh (1982)

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