Vegetation indices
Temporal dynamics of spectral reflectance and vegetation indices during canola crop cycle in southern Brazil
... The vegetation indices employed in this study exhibited similar variation in temporal dynamics, demonstrating structural changes in the canopy (Figure ...flowering. Indices then declined during the ...
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IN-SEASON ASSESSMENT OF WHEAT CROP HEALTH USING VEGETATION INDICES BASED ON GROUND MEASURED HYPER SPECTRAL DATA
... green vegetation cover and crop moisture, in addition to the detection of plant ...Spectral vegetation indices, determined mathematically at various spectral bands, are considered as semi-analytical ...
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Vegetation indices in the prediction of biomass and grain yield of white oat under irrigation levels
... Vegetation indices are widely used to indicate the nutritional status of crops, as well as to estimate their harvest ...Difference Vegetation Index (NDVI) and Inverse Ratio Vegetation Index ...
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Variation of MODIS Reflectance and Vegetation Indices with Viewing Geometry and Soybean Development
... In order to keep the reproductive stage for a given soybean cultivar as a constant factor whilst varying the viewing geometry, two pairs of images obtained at opposite view angles and consecutive dates were analyzed in ...
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Estimating carbon dioxide fluxes from temperate mountain grasslands using broad-band vegetation indices
... broad-band vegetation indices, probably with the exception of reflected PAR, are made routinely at the major- ity of the existing FLUXNET sites it would require relatively little extra effort to extend ...
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IDENTIFICATION OF DESERTIFICATION- SENSITIVE AREAS IN THE BRAZILIAN NORTHEAST THROUGH VEGETATION INDICES
... frequency, Vegetation Condition Index (VCI) dataset derived from MOD13Q1 products (vegetation indices derived from the Moderate Resolution Imaging Spectroradiometer ...
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COMPARISON OF DIFFERENT VEGETATION INDICES FOR VERY HIGH-RESOLUTION IMAGES, SPECIFIC CASE ULTRACAM-D IMAGERY
... extracting vegetation from semi-urban and agricultural regions were studied and their results were compared in terms of overall accuracy and Kappa ...several vegetation indices were first tested on ...
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Annual evapotranspiration retrieved solely from satellites' vegetation indices for the Eastern Mediterranean
... The contribution of annual and perennial vegetation to VIs at the sub pixel level is most difficult to distinguish in PA systems (Karnieli, 2003). In some cases, one of those components might have dominant ...
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Improving operational land surface model canopy evapotranspiration in Africa using a direct remote sensing approach
... total vegetation cover of GNOAH is the sin- gle most important variable controlling ...determine vegetation indices, and this undoubtedly plays a role in the results, which should be considered along ...
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INFLUENCE OF DATA ACQUISITION GEOMETRY ON SOYBEAN SPECTRAL RESPONSE SIMULATED BY THE PROSAIL MODEL
... the vegetation, soybean fields with the same biochemical and biophysical attributes can present very different spectral reflectance solely due to changes in the geometry of data acquisition (GALVÃO et ...or ...
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GEOSPATIAL ASSESSMENT OF PEST-INDUCED FOREST DAMAGE THROUGH THE USE OF UAV-BASED NIR IMAGING AND GI-TECHNOLOGY
... calculated vegetation indices, color-infrared composite and principal ...Different vegetation indices are able to highlight special feature of vegetation, for instance, level of ...
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MEDIDAS DE REFLECTÂNCIA HIPERESPECTRAL A CAMPO PARA ESTIMAR PRODUTIVIDADE DE GRÃOS E ALTURA DE PLANTAS DE TRIGO
... of vegetation spectral reflectance measurements appear to be less sensitive to soil background reflectance effects (Demetriades-Shah et ...band vegetation indices to estimate final grain yield and ...
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Utilização de índices de vegetação para os sistemas de informação geográfica - USE OF ÃNDEX VEGETATION FOR THE GEOGRAPHIC INFORMATION SYSTEM
... Índex Vegetation (IV) are mathematical models developed to assess and diagnose the canopy leaf area index, biomass, percentage of soil cover, photosynthetic activity and productivity, and have been used ...
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Correlations between spectral and biophysical data obtained in canola canopy cultivated in the subtropical region of Brazil
... the vegetation indices (Jensen, 2009): simple ratio (SR), normalized difference vegetation index (NDVI), enhanced vegetation index (EVI), soil-adjusted vegetation index (SAVI), and ...
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Determination of nitrogen and chlorophyll levels in bean-plant leaves by using spectral vegetation bands and indices
... results found by Brito et al. (2009). They determined that N uptake occurs throughout the crop cycle, but that the period of higher demand, when N uptake is at a maximum, occurred between 58 and 68 days after seeding ...
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INFLUENCE OF THE VIEWING GEOMETRY WITHIN HYPERSPECTRAL IMAGES RETRIEVED FROM UAV SNAPSHOT CAMERAS
... about vegetation canopies (Koukal et ...hyperspectral vegetation indices (VIs), like the NDVI, can compensate the angular effects and if the viewing geometry influences the apparent heterogeneity ...
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Assessing biophysical variable parameters of bean crop with hyperspectral
... band vegetation indices (VI) derived from hyperspectral measurements acquired by a field spectrometer was evaluated to estimate bean (Phaseolus vulgaris ...
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Identifying drought events in sugarcane using drought indices derived from Modis sensor
... events. Vegetation indices and drought, humidity, and surface temperature data derived from satellite images are used to this end (Ghulam et ...difference vegetation index (NDVI), obtained from Modis ...
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Environmental assessment of Mangrove communities in Tarut Bay, Eastern Arabian Peninsula, based on multidisciplinary approach
... The vegetation index (NDVI) was calculated from SPOT-5 images to understand the spatial extent of mangrove communities’ health and concentration in Tarut Bay for the years 2011 and ...produced vegetation ...
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Modeling Soil Organic Carbon at Regional Scale by Combining Multi-Spectral Images with Laboratory Spectra.
... of vegetation cover and soil biogeochemical properties from which a series of vegetation indices based on the RS imagery can be used for modeling soil properties and ...green vegetation is the ...
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