Results 31 to 40 of about 11,897 (218)

Using hyperspectral remote sensing data for retrieving canopy water content [PDF]

open access: yes, 2009
Canopy water content (CWC) is important for understanding functioning of terrestrial ecosystems. Spectral derivatives at the slopes of the 970 nm and 1200 nm water absorption features offer good potential as estimators for CWC.
Clevers, J.G.P.W., Kooistra, L.
core   +2 more sources

Monitoring Surface Soil Moisture Content over the Vegetated Area by Integrating Optical and SAR Satellite Observations in the Permafrost Region of Tibetan Plateau

open access: yesRemote Sensing, 2020
Surface soil moisture (SSM), the average water content of surface soil (up to 5 cm depth), plays a key role in the energy exchange within the ecosystem.
Chenyang Xu   +3 more
doaj   +1 more source

Análisis de la vegetación a partir de índices espectrales y su relevancia en la identificación de espejos de agua en el humedal Torca Guaymaral, Bogotá, Colombia

open access: yesAvances, 2023
En Colombia son varios los humedales han experimentado cambios significativos en el espejo de agua, ya sea por procesos naturales o antrópicos; la mayoría de estos presentan eutrofización, hecho que se comprueba por la proliferación descontrolada de ...
Cindy Lorena Sabogal Vélez   +2 more
doaj   +1 more source

Fine-scale mapping of vector habitats using very high resolution satellite imagery : a liver fluke case-study [PDF]

open access: yes, 2014
The visualization of vector occurrence in space and time is an important aspect of studying vector-borne diseases. Detailed maps of possible vector habitats provide valuable information for the prediction of infection risk zones but are currently lacking
Charlier, Johannes   +8 more
core   +2 more sources

Study of Fluctuations in Surface Area of Lake Haramaya using NDWI and MNDWI Methods

open access: yesJournal of Geospatial Information Science and Engineering, 2022
Lakes are of great value to human beings and important for various reasons like regulating the flow of river water, to maintain the eco-system and storage of water during the dry seasons. Lake Haramaya, which is situated at 14 km Northwest of Harer town (
Riyaz Khan N H
doaj   +1 more source

Low-Quality Housing Is Associated With Increased Risk of Malaria Infection: A National Population-Based Study From the Low Transmission Setting of Swaziland. [PDF]

open access: yes, 2017
BackgroundLow-quality housing may confer risk of malaria infection, but evidence in low transmission settings is limited.MethodsTo examine the relationship between individual level housing quality and locally acquired infection in children and adults, a ...
Allen, Regan   +14 more
core   +2 more sources

Geothermal Distribution Analysis of Geureudong Volcano Based On Satellite Data and Fault Fracture Density (FFD)

open access: yesElkawnie: Journal of Islamic Science and Technology, 2022
: Geureudong Volcano area, Bener Meriah, has the potential to be developed as a renewable energy source. Analysis of the distribution of geothermal manifestations can be done with remote sensing techniques and direct measurement. Furthermore, information
Muhammad Isa   +3 more
doaj   +1 more source

Detection of multi-tomato leaf diseases (late blight, target and bacterial spots) in different stages by using a spectral-based sensor. [PDF]

open access: yes, 2018
Several diseases have threatened tomato production in Florida, resulting in large losses, especially in fresh markets. In this study, a high-resolution portable spectral sensor was used to investigate the feasibility of detecting multi-diseased tomato ...
de Castro, Ana Isabel   +4 more
core   +2 more sources

Mapping Europe into local climate zones [PDF]

open access: yes, 2019
Cities are major drivers of environmental change at all scales and are especially at risk from the ensuing effects, which include poor air quality, flooding and heat waves.
Bechtel, Benjamin   +3 more
core   +2 more sources

Avaliação da precisão temática de composições de NDBI, NDVI, NDWI

open access: yesRevista Brasileira de Geomática, 2016
Este artigo trata de experimentos usando composições de índices físicos NDVI (Normalized Difference Vegetation Index), NDWI (Normalized Difference Water Index), NDBI (Normalized Difference Built-Up Index), para avaliar a precisão temática do classificador Máxima Verossimilhança (MAXVER) usando exatidão global, índice kappa e teste Z.
Júlio Cezar Cotrim Moreira Filho   +1 more
openaire   +3 more sources

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