Results 111 to 120 of about 5,916,710 (320)

Análise temporal e cálculo de áreas construídas usando método BAEM a partir de imagens de sensoriamento remoto

Coleção Estudos Cariocas
O presente estudo trata da análise temporal e cálculo de áreas construídas usando o método BAEM. Como fonte de dados, foram utilizadas imagens do sistema de satélite Landsat 8 do Parque Estadual da Serra da Tiririca, em Niterói, Rio de Janeiro, Brasil ...
Sonia Maria Lima Silva, Elisângela Silva de Paula, Luiz Carlos Teixeira Coelho Filho   +2 more
doaj   +1 more source

Soil salinity assessment by using near-infrared channel and Vegetation Soil Salinity Index derived from Landsat 8 OLI data: a case study in the Tra Vinh Province, Mekong Delta, Vietnam

Progress in Earth and Planetary Science, 2020
Salinity intrusion is a pressing issue in the coastal areas worldwide. It affects the natural environment and causes massive economic loss due to its impacts on the agricultural productivity and food safety.
K. Nguyen, Y. Liou, H. Tran, Phi-Phung Hoang, T. Nguyen   +4 more
semanticscholar   +1 more source

Radiometric cross-calibration of Göktürk-2 with Landsat 8

2017 25th Signal Processing and Communications Applications Conference (SIU), 2017
Radiometric calibration studies need to be done during the life-time of a satellite. In this paper, reflectance-based cross calibration was conducted at Tuz Golu LandNet site in 2016 using Gokturk-2 and Landsat 8 imageries. Using near-simultaneous images of the satellites under the same atmospheric conditions reduces the effect caused by reflection ...
Demirhan, Ismail Hakki, Deveci, Husne Seda, Sakarya, Ufuk   +2 more
openaire   +3 more sources

Wall‐to‐wall Amazon forest height mapping with Planet NICFI, Aerial LiDAR, and a U‐Net regression model

Remote Sensing in Ecology and Conservation, EarlyView.
Tree canopy height is a key indicator of forest biomass and structure, yet accurate mapping across the Amazon remains challenging. Here, we generated a canopy height map of the Amazon forest at ~4.8 m resolution using Planet NICFI imagery and a deep learning U‐Net model trained with airborne LiDAR data.
Fabien H. Wagner, Ricardo Dalagnol, Griffin Carter, Mayumi C. M. Hirye, Shivraj Gill, Le Bienfaiteur Sagang Takougoum, Samuel Favrichon, Michael Keller, Jean P. H. B. Ometto, Lorena Alves, Cynthia Creze, Stephanie P. George‐Chacon, Shuang Li, Zhihua Liu, Adugna Mullissa, Yan Yang, Erone G. Santos, Sarah R. Worden, Martin Brandt, Philippe Ciais, Stephen C. Hagen, Sassan Saatchi   +21 more
wiley   +1 more source

A Comparison of AVIRIS and Landsat for Land Use Classification at the Urban Fringe

, 2004
In this study we tested whether AVIRIS data allowed for improved land use classification over synthetic Landsat ETM+ data for a location on the urban-rural fringe of Colorado.
Goetz, Alexander F.H., Platt, Rutherford V.   +1 more
core   +1 more source

Improving forest age estimation to understand subtropical forest regrowth dynamics using deep learning image segmentation of time‐series historical aerial photographs

Remote Sensing in Ecology and Conservation, EarlyView.
Accurately estimating forest age is key to understanding how forests recover and evaluating restoration success. We developed a two‐step deep learning approach using historical greyscale aerial photographs to map forest age at fine spatial scales. By combining a pre‐trained model with localized fine‐tuning, our U‐Net + ResNet50 architecture achieved ...
Ying Ki Law, Yi‐Fei Gu, Shuwen Liu, Guangqin Song, Aland H. Y. Chan, Cham Man Tse, Zhonghua Liu, Martha J. Ledger, Billy C. H. Hau, Sawaid Abbas, Jin Wu   +10 more
wiley   +1 more source

LANDSAT-5 orbit adjust maneuver report [PDF]

The orbit adjust maneuvers performed to raise the LANDSAT 5 spacecraft to mission altitude, synchronize it with the required groundtrack, and properly phase the spacecraft with LANDSAT-4 to provide an 8 day full Earth coverage cycle are described ...
Hassett, P. J., Johnson, R. L.
core   +1 more source

Using phenology to improve invasive plant detection in fine‐scale hyperspectral drone‐based images

Remote Sensing in Ecology and Conservation, EarlyView.
Using drone‐based hyperspectral images of mixed temperate successional forests collected over a growing season, detection algorithms were produced for three invasive species of interest, which are not only invasive in Virginia but also much of the U.S.: Ailanthus altissima (tree of heaven), Elaeagnus umbellata (autumn olive), and Rhamnus davurica ...
Kelsey S. Huelsman, Howard E. Epstein, Xi Yang, Roderick Walker   +3 more
wiley   +1 more source

Digital color analysis of color-ratio composite LANDSAT scenes [PDF]

A method is presented that can be used to calculate approximate Munsell coordinates of the colors produced by making a color composite from three registered images.
Raines, G. L.
core   +1 more source

Compare NDVI Extracted from Landsat 8 Imagery with that from Landsat 7 Imagery [PDF]

American Journal of Remote Sensing, 2014
Landsat 8, the ongoing mission of the Landsat satellites that have provided over 40 years of images, continues to benefit long-term research. However, it is important to know if the spectral features of Landsat 8 are of the same standard as previous Landsat imagery because Landsat 8 images have narrower bands, especially because of the normalized ...
openaire   +1 more source