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Auteur José Luis Casanova |
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A very quick neural network algorithm for cloud detection / K.R. Al-Rawi in Geocarto international, vol 18 n° 1 (March - May 2003)
[article]
Titre : A very quick neural network algorithm for cloud detection Type de document : Article/Communication Auteurs : K.R. Al-Rawi, Auteur ; José Luis Casanova, Auteur ; A. Vasileisky, Auteur Année de publication : 2003 Article en page(s) : pp 45 - 50 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] classification par réseau neuronal
[Termes IGN] image NOAA-AVHRR
[Termes IGN] nuage
[Termes IGN] radianceRésumé : (Auteur) A very quick neural network algorithm for cloud detection, based on a neural network, is developed. Cloud detection is speeded up through the use of the Class Assigning Space (CAS). The CAS is a classified Radiance Space (RS), which has been built using the trained neural network. The GAS is used to assign a class for each pixel in the image instead of using the ANN to treat every single pixel. The detection time is approximately one second. Channel 1 and channel 5 of N0AA-AVHRR images have been used. The Supervised ARTII artificial neural network has been employed. The system performance has been tested with different training sets and different input data. Numéro de notice : A2003-101 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040308542262 En ligne : https://doi.org/10.1080/10106040308542262 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22397
in Geocarto international > vol 18 n° 1 (March - May 2003) . - pp 45 - 50[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 059-03011 RAB Revue Centre de documentation En réserve L003 Disponible Relationship between drought indicators based on remote sensing and forest fires incidence in Spain / Águeda Vázquez (2001)
Titre : Relationship between drought indicators based on remote sensing and forest fires incidence in Spain Type de document : Article/Communication Auteurs : Águeda Vázquez, Auteur ; F. Gonzalez-Alonso, Auteur ; J.M. Cuevas Gozalo, Auteur ; A. Calle, Auteur ; José Luis Casanova, Auteur Editeur : Lisse et Amsterdam : Balkema (August Aimé) Année de publication : 2001 Conférence : EARSeL 2001, 21st international symposium, Observing our environment from space : news solutions for a new millennium 14/05/2001 16/05/2001 Paris France Importance : pp 111 - 115 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Baléares, îles
[Termes IGN] Espagne
[Termes IGN] image NOAA-AVHRR
[Termes IGN] incendie de forêt
[Termes IGN] indice de végétation
[Termes IGN] lutte contre l'incendie
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] risque naturelRésumé : (Auteur) In this communication, we combine different products obtained from the NOAAAVHRR sensor in order to evaluate the relationships between the anomalies in the NDVI in peninsular Spain and the Balearic islands during the four summer months of the year 2000 and the active "hot spots" detected in the same time period and available in the World Fire Web. The analysis is carried out using the relative proportions of pixels affected and not affected by fire in the several anomaly classes defined for the whole study area and additionally for the different Autonomous Communities. Our starting hypothesis is that forest fires are registered in higher proportions in the negative anomaly classes, that is, with NDVI values lower than the mean for a reference period. The results obtained present a great agreement with this hypothesis, in such a way that the relative proportion of pixels affected by fire is greater in the negative anomaly classes. Numéro de notice : C2001-026 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Communication DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64934 Remote sensing in the 21st century : economic and environmental applications / José Luis Casanova (2000)
Titre : Remote sensing in the 21st century : economic and environmental applications : Proceedings of the 19th Earsel Symposium on remote sensing in the 21st century, Valladolid, Spain, 31 May - 2 June 1999 Type de document : Actes de congrès Auteurs : José Luis Casanova, Éditeur scientifique Editeur : Lisse et Amsterdam : Balkema (August Aimé) Année de publication : 2000 Conférence : EARSeL 1999, 19th symposium, Remote sensing in the 21st century : economic and environmental applications 31/05/1999 02/06/1999 Valladolid Espagne Importance : 610 p. Format : 18 x 26 cm ISBN/ISSN/EAN : 978-90-5809-096-6 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] agriculture
[Termes IGN] éclairement énergétique
[Termes IGN] géologie
[Termes IGN] image radar
[Termes IGN] image radar moirée
[Termes IGN] image satellite
[Termes IGN] incendie de forêt
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] irrigation
[Termes IGN] météorologie
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] océanographie spatiale
[Termes IGN] radar à antenne synthétique
[Termes IGN] restauration d'image
[Termes IGN] risque naturel
[Termes IGN] ruissellement
[Termes IGN] sylviculture
[Termes IGN] télédétection en hyperfréquence
[Termes IGN] turbulence
[Termes IGN] utilisation du sol
[Termes IGN] zone humideNote de contenu : KEYNOTE LECTURES
- The future ESA Earth-Observation Strategy and ESA's 'Living Planet' programme by D.J. Southwood
- The Council of Europe's EUR-OPA Major Hazards Agreement by J.P. Massué & C. Negru
1. AGRICULTURE AND FORESTRY
- Space-vegetation software: A remote sensing tool for environmental applications at regional level by C Carmona-Moreno, J -A Moreno-Ruiz, E Bartholome & T. Negre
- Unsupervised classification's optimization by C. Pinilla, F.J. Ariza & M. Sanchez de la Orden
- A methodological approach for agricultural statistics by remote sensing by D. Yousfi
- The role of TM thermal band in describing the state/stress of vegetation by S.K.A. Panah & R. Goossens
- Drought monitoring of Spanish forests using Landsat TM satellite images by A. Vazquez, J M Cuevas, F. Gonzalez-Alonso, A Calle & J L Casanova
- Monitoring of forest change by using multi-temporal satellite data by N. Musaoglu & C Ormeci
- Integration of NOAA-AVHRR and meteorological data in a GIS - Application for vegetation monitoring in Castilla y Leon, Spain by P. Illera, J.A. Delgado, A.F. Unzueta & A.A.F. Manso
- Crop spatial characterization in the 18th aquifer, Spain by J. Garcia-Consuegra, F. Abad & G. Cisneros
- The use of satellite remote sensing imagery for detection of secondary forests on post-agricultural soils : A case study of Tuchola Forest, Northern Poland by M Kunz, A Nienartowicz & M Deptula
- The application of aerial photographs for analysis of landscape diversity in Reserve Grzedy, Biebrza National Park, Poland by M. Falencka-Jablonska, M Kunz &A Nienartowicz
- Drought monitoring based on thermal and microwave satellite data by K Dabrowska-Zielinska, A Ciolkosz, M Gruszczynska, W. Kowalik & E Kogan
- Irrigated crop identification and surface estimation with Landsat TM imagery in La Mancha oriental region, Spain by C. M Beltran, A C. Belmonte, JR. R. Gallardo & J. S. Garcia
- The integration of satellite images and GIS for Omerli Water Basin land use changes by C. Goksel & H. Turkoglu
- Geographical analysis using GIS of agrarian land use in the Province of Valladolid in 1997 with own classification on multiband satellite images by F.J. Tapiador & J. L Casanova
- Application of remote sensing to the study of oak decline in Aragon, Spain by S. Ait-Bachir, E G. Pelegrin & B. Lacaze
- Modelisation of the NDVI temporal evolution in forestry of Castilla y Leon Spain using climatic data by A.A.F. Manso, P. Illera, J.A. Delgado & A E Unzueta
2. METEOROLOGY
- Consequences of spatial resolution transformations for land-use classification by U. Fehrenbach & D. Scherer
- Validation of cloud detection algorithms by E Sospedra, V. Caselles, C. di Bella, C Coll, E Valor & E Rubio
- Measurements of C02 fluxes in Central Spain using the eddy correlation technique: Preliminary results by M.L. Sanchez, R. Rodriguez, S. Martinez, M Ozores & M.J. Lopez
- Selecting a clear-sky model to accurately map solar radiation from satellite images by G. Rigollier & L. Wald
- Radiative Bowen ratio to estimate daily fluxes from satellite images by M. Ibanez, V. Caselles & R Pérez
- Investigation of surface characteristics by the synergy of ground observations and NOAA/ AVHRR satellite measurements by J. Kerenyi, A. Merza, G. Gutman &L Csiszar
- Meteorological radar data processing software by D.D. Rancic, M.S. Smiljanic, S. Djordjevic-Kajan, P M Eferica, P D. Vukovic & A T Kostic
- Evaluation and behavior of the aerosol c Angstrom coefficient from spectral solar irradiance measurements in the Gulf of Cadiz (Huelva, Spain) to assess ocean color atmospheric correction by V E. Cachorro, R. Vergaz, A & A M De Frutos
- Calculation and analysis of erythematic irradiance using experimental data and TOMS ozone data by A Calle, A M Perez & J L Casanova
3. HYDROLOGY
- Wetland monitoring by the integration of remotely sensed data in a GIS tool by S. Castano, M.E. Mejuto, A. Vela & A. Quintanilla
- The use of Earth Observation for monitoring snowmelt runoff from non-alpine basins by R.G. Caves, O.C. Turpin, G.D. Clark, R.L Ferguson, S. Quegan & B. Johansson
- Three years of mapping irrigation water in the Flumen irrigation district, Spain by T. Martin-Ordonez, Ma.A Casterad & J Herrero
- Satellite monitoring in Amudarya river basin hydrology by V.E. Chub
- Application of mathematical functions for the monitoring of the small water bodies by V.E. Chub, N E. Gorelkin & S.V. Myagkov
4. METHODOLOGY
- Generation and integration of thematic documents from satellite images and ground sensors for environmental analysis and management by S. Ormeno & L Molina
- Accurate geodetic positioning of satellite laser ranging stations using a short arc geometric solution by M Catalan-M P Villares & M Catalan-PU
- Remote sensed image rectification in an automatic way by A. Martinez, F.J. Abad & J D. Garcia-Consuegra
- Architecture of a new generation of remote sensing ground segments by K. Seidel & M Datcu
- 'Supervised ART-II' neural network for Landsat TM image classification by K R. Al-Rawi, G Gonzalo & E. Martinez
- Mode of spectral angular distribution function extraction by A Nekrassov
- Correction of the sea wave height measuring results in airborne dual-frequency scatterometer measurement by A. Nekrassov
- Shaping a field of acoustic parametric array in periodic structure with diffuse borders by M.Y. Georgi & N.P. Zagrai
- Quality and quantity of ground control points in the orthorectifying process by M C. S. Trigo & J VG. Cervera
- Tool for integration and bi-directional conversion of remote sensing data by A. Arquero, C Gonzalo, E. Martinez & O. Gordo
- Self-organized criticality in the environment and remotely sensed data by L.N.Vasiliev
- ECEP-ECHO: Extraction and classification of edge pixels in an ECHO approach by J. Garcia-Consuegra, A Martinez & G. Cisneros
- An adaptive soft thresholding method for Speckle noise reduction in Synthetic Aperture Radar images by A Vidal-Pantaleoni, D. Marti & M. Ferrando
- 2-D phase unwrapping in Synthetic Aperture Radar interferometry by A. Vidal-Pantaleoni, R. Oviol & M. Ferrando
- Radiometric characterisation of the olive tree crops by C. Pinilla, F.J. Ariza & M. Sanchez
- Adjustment of the satellite image to the three-dimensional relief model by L.N. Borovikova, S.V. Myagkov & I. Durdina
- Textural classification using textural signatures by A Kourgh & A Belhadj-Aissa
- The MPNA algorithm for atmospheric correction of satellite imagery by M Ouarzeddine & A Belhadj-Aissa
- An automatic method to calibrate Meteosat visible images by M Lefevre, O. Bauer, A. Iehle & L. Wald
- Education and research in remote sensing in Algeria by Y. Smara & A Belhadj-Aissa
5. FOREST FIRES
- Forest and fire monitoring with NOAA AVHRR imagery in the Central African Republic by I. EI Ghazzawi
- Building-up a Burned Area Monitoring System based on Earth Observation data by J.U. Paul, M.R. Caetano & T. Santos
- Remote sensing estimation of fuel moisture content by E. Chuvieco, PJ. Vaughan, D. Riano & D. Cocero
- Ground-based infrared characterization of fires in the 3-5 gm spectral window by A.J. de Castro, J.M. Aranda, S. Briz & F. Lopez
- Analysis of the environmental factors in forest wildfires in Aznalcollar and Sierra Bermeja by A.S. Redondo & J.V.G. Cervera
- Temperature maps obtained from satellite images for a forest wildfire temporal evolution analysis by A.S. Redondo & J.V.G. Cervera
- Automatic mapping of large scale forest fires in Spain using Landsat-TM images by E. Quintano, J.A. Delgado, A. Fernandez & P. Illera
- An operational system for the forest fire risk assessment by means of NOAA images by A. Calle, J.L. Casanova, A. Ronto & E.Gonzalez-Alonso
6. YIELD ESTIMATION
- Estimation of cereal yields combining crop growth models and remotely sensed vegetation indices by B.J. Denore, J.L. Meilan, J.M. Williams, M. Cole, K.J. de Koeijer, J.J. Colls & C. Trigueros
- Integration of satellite data and administrative information in crop yield monitoring by R. Kuittinen, L. Matikainen, Y. Keskisarja, E. Partnes & Y.Perdigao
- Operational use of NOAA data for crop condition assessment in Poland by Z. Bochenek
7. HAZARDS
- Monitoring the distribution of shallow landslide-prone areas using remote sensing, WM and GIS : A case study from the tropical Andes of Venezuela by H. Gomez, R.P. Bradshaw & P.M. Mather
- Towards an operational monitoring of drought conditions in Spain using satellite images by F. Gonzalez-Alonso, A. Vazquez, J.M. Cuevas, A. Calle & J.L. Casanova
- Land degradation assessment in a semi-arid environment through the use of spectral indices and spectral unmixing by D. Haboudane, F. Bonn, A. Royer, S. Sommer & W. Mehl
- A study on deposit and erosion phenomena along the southern coast of Sicily using satellite remote sensing by A.L. Geraci, F.F. Landolina & A.O. Trovato
8. OCEANOGRAPHY
- A mean sea level variation in the Mediterranean using Topex-Poseidon, ERS-1 and ERS-2 altimeter observations by M. Catalan-PU, P. Villares, M. Bruno, J.J. Alonso, A. Ruiz-Canavate & M. Catalan-M
- Red tides GIS monitoring the Galician Coast by P.C. Pardo, M.M.S. Cuadrado, J.M. Herrero & J.M.T. Palenzuela
- Location of tuna-fish banks in the Mediterranean Sea using NOAA images by A. Romo, J.L. Casanova & A. Calle
- Developing and testing of an atmospheric correction model for water leaving radiance retrieval in the area of the Gulf of Cadiz based on experimental measurements by V.E. Cachorro, R. Vergaz, A Berjon, A.M. De Frutos & J. Morales
- The use of Topex-Poseidon, ERS- 1 and ERS-2 altimeters to detect meddies by P. Villares, M. Bruno, J.J. Alonso, A. Ruiz-Canavate, M. Catalan-PU, M Catalan-M
- Environmental study in the estuary of river Miflo by L.B. Villar, J.M. Herrero, J.M.T. Palenzuela & L.E. Fernandes
- Applications of SAR images in the western Mediterranean Sea by J.J.M. Benjamin, J.M. Redondo, J. Jorge & A. Platonov
- Pressure ridges extraction using Radarsat fine beam mode by E Hudier
9 GEOLOGY
- A GIS for the Natural Resources Authority, Amman, Jordan by H.J. Baxendale & L.A. Abu Saad
- Developing a technical computing facility at the Geological Commission in Guyana by A.P. Marchant & J.R. Gibson
- A remote sensing based approach for the restoration of an open-cast coal mine site in Spain by J.F. Llorens, J.L. Fernandez-Turiel, C. Banninger & A. Almer
- Discrimination of active alluvial sedimentary surfaces in TM images based on laboratory reflectance spectroscopy by E. Garcia-Melendez, A. Riaza & M. Sudrez
- Lithological and geomorphological large-scale mapping using remotely sensed data, GIS and terrain analysis by E. Wolk-Musial & B. Zagajewski
- Geomorphological-geological evaluation of the Gazikoy-Saros section of Northern Anatolian Fault zone using remotely sensed data by S. Kaya & O. Muftuoglu
10. RADAR AND HYPERSPECTRAL TECHNIQUES
- Optical indices as bioindicators of forest condition from hyperspectral CASI data by P.J. Zarco-Tejada, J.R. Miller, G.H. Mohammed, T.L. Noland & P.H. Sampson
- Metric relations in INSAR topographic modeling by G. Brandstadtter & A.L. Sharov
- Advanced polarimetric SAR data classification for cartographic information extraction by M.E. Buchroithner, E. Kraetzschmar & M. Hellmann
- A model for atmospheric correction of DAIS hyperspectral imager sensor based on experimental optical measurements by V.E. Cachorro, R. Vergaz & A.M. De Frutos
- Refined adaptive speckle filtering for SAR images by D. Cherifi & Y. Smara
- Textural classification using textural signatures by A. Kourgli & A. Belhadj-Aissa
- SAR imagery in urban area by L. Basly, E. Cauneau, T. Ranchin & L. Wald
- Scale evolution due to hydrodynamic modulation of SAR imaging by I.-F. Shen, M.J. Liou & Y. Li
- A unified approach to change analysis and despeckle of multitemporal ERS-1 by L. Alparone, S. Baronti, M Falugi & A. GarzelliNuméro de notice : 13020 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34606 Contient
- Temperature maps obtained from satellite images for a forest wildfire temporal evolution analysis / A.S. Redondo (31/05/1999)
- Advanced polarimetric SAR data classification for cartographic information extraction / Manfred F. Buchroithner (31/05/1999)
- SAR imagery in urban area / L. Basly (31/05/1999)
- Automatic mapping of large scale forest fires in Spain using Landsat-TM images / E. Quintano (31/05/1999)
- Refined adaptive speckle filtering for SAR images / Y. Smara (31/05/1999)
- The application of aerial photographs for analysis of landscape diversity in reserve Grzedy, Biebrza national parc, Poland / M. Falencka-Jablonska (31/05/1999)
- An operational system for the forest fire risk assessment by means of NOAA images / A. Calle (31/05/1999)
- Textural classification using textural signatures / A. Kourgli (31/05/1999)
- Drought monitoring based on thermal and microwave satellite data / Katarzyna Dabrowska-Zielinska (31/05/1999)
- Monitoring the distribution of shallow landslide-prone areas using remote sensing, DTM and GIS: a case study from the tropical Andes of Venezuela / H. Gomez (31/05/1999)
- Drought monitoring of Spanish forests using Landsat TM satellite images / Águeda Vázquez (31/05/1999)
- Forest and fire monitoring with NOAA AVHRR imagery in the central African Republic / I. El Ghazzawi (31/05/1999)
- Towards an operational monitoring of drought conditions in Spain using satellite images / F. Gonzalez-Alonso (31/05/1999)
- Building-up a burned area monitoring system based on Earth observation data / J.U. Paul (31/05/1999)
- A study on deposit and erosion phenomena along the southern coast of Sicily using satellite remote sensing / A.L. Geraci (31/05/1999)
- Remote sensing estimation of fuel moisture content / E. Chuvieco (31/05/1999)
- Optical indices as bioindicators of forest condition from hyperspectral CASI data / Pablo J. Zarco-Tejada (31/05/1999)
- Analysis of the environment factors in forest wildfires in Aznalcollar and Sierra Bermeja / A.S. Redondo (31/05/1999)
- Metric relations in INSAR topographic modelling / G. Brandstätter (31/05/1999)
Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 13020-01 CG.99 Livre Centre de documentation Congrès Disponible An operational system for the forest fire risk assessment by means of NOAA images / A. Calle (31/05/1999)
contenu dans Remote sensing in the 21st century : economic and environmental applications / José Luis Casanova (2000)
Titre : An operational system for the forest fire risk assessment by means of NOAA images Type de document : Article/Communication Auteurs : A. Calle, Auteur ; José Luis Casanova, Auteur ; A. Romo, Auteur ; F. Gonzalez-Alonso, Auteur Editeur : Lisse et Amsterdam : Balkema (August Aimé) Année de publication : 31/05/1999 Conférence : EARSeL 1999, 19th symposium, Remote sensing in the 21st century : economic and environmental applications 31/05/1999 02/06/1999 Valladolid Espagne Importance : pp 363 - 368 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Alpes-maritimes (06)
[Termes IGN] Aude (11)
[Termes IGN] Bouches-du-Rhône (13)
[Termes IGN] cartographie des risques
[Termes IGN] Gard (30)
[Termes IGN] image NOAA
[Termes IGN] incendie de forêt
[Termes IGN] Italie
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] Portugal
[Termes IGN] prévention des risques
[Termes IGN] risque naturel
[Termes IGN] température de surface
[Termes IGN] Var (83)
[Termes IGN] zone à risqueRésumé : (Auteur) The model we show in order to obtain a Forest Fire Risk Assessment combines two kinds of analysis involving NDVI and surface temperature. The University of Valladolid Remote Sensing Laboratory (LATUV) is equipped with a NOAA image receiver, and the risk pattern is practically automated ; in this way after receiving the satellite image on a daily basis and applying the above-mentioned algorithms, detailed maps are produced with information relating to local distribution over the whole country, with Forest Fire Risk levels.This information is very useful to the Fire Prevention Services of the Autonomous Communities during the summer season, when the incidence of forest fires is high. This Risk Assessment is also determined for Portugal, Italy and the mediterranean areas of France. Numéro de notice : C1999-045 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Communication Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65811 Drought monitoring of Spanish forests using Landsat TM satellite images / Águeda Vázquez (31/05/1999)
contenu dans Remote sensing in the 21st century : economic and environmental applications / José Luis Casanova (2000)
Titre : Drought monitoring of Spanish forests using Landsat TM satellite images Type de document : Article/Communication Auteurs : Águeda Vázquez, Auteur ; J.M. Cuevas Gozalo, Auteur ; F. Gonzalez-Alonso, Auteur ; A. Calle, Auteur ; José Luis Casanova, Auteur Editeur : Lisse et Amsterdam : Balkema (August Aimé) Année de publication : 31/05/1999 Conférence : EARSeL 1999, 19th symposium, Remote sensing in the 21st century : economic and environmental applications 31/05/1999 02/06/1999 Valladolid Espagne Importance : pp 37 - 39 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse diachronique
[Termes IGN] carte de la végétation
[Termes IGN] Espagne
[Termes IGN] image Landsat-TM
[Termes IGN] image multitemporelle
[Termes IGN] inventaire forestier étranger (données)
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] risque naturel
[Termes IGN] sécheresseRésumé : (Auteur) In this work, we combine spatial data from a Digital Forest Map of Spain, the Second National Forest Inventory and TM images to explore the differences in the spectral response of several vegetation types in three years with strong differences in water availability. The results point to the possibility of discrimination between dry and humid years based on the NDVI, although drought conditions affect in different ways to the several vegetation types. Numéro de notice : C1999-036 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Communication Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65802 Towards an operational monitoring of drought conditions in Spain using satellite images / F. Gonzalez-Alonso (31/05/1999)Permalink