نتایج جستجو برای: تصاویر landsat

تعداد نتایج: 24956  

Journal: :Remote Sensing 2016
Xiaoyi Wang Huabing Huang Peng Gong Gregory S. Biging Qinchuan Xin Yanlei Chen Jun Yang Caixia Liu

Continuous monitoring of forest cover condition is key to understanding the carbon dynamics of forest ecosystems. This paper addresses how to integrate single-year airborne LiDAR and time-series Landsat imagery to derive forest cover change information. LiDAR data were used to extract forest cover at the sub-pixel level of Landsat for a single year, and the Landtrendr algorithm was applied to L...

Journal: :Remote Sensing 2016
Harald van der Werff Freek D. van der Meer

Sentinel-2A MSI is the Landsat-like spatial resolution (10–60 m) super-spectral instrument of the European Space Agency (ESA), aimed at additional data continuity for global land surface monitoring with Landsat and Satellite Pour l’Observation de la Terre (SPOT) missions. Several simulation studies have been conducted in the last several years to show the potential of Sentinel-2A MSI (MultiSpec...

Journal: :Journal of environmental management 2009
Javier Bustamante Fernando Pacios Ricardo Díaz-Delgado David Aragonés

We have used Landsat-5 TM and Landsat-7 ETM+ images together with simultaneous ground-truth data at sample points in the Doñana marshes to predict water turbidity and depth from band reflectance using Generalized Additive Models. We have point samples for 12 different dates simultaneous with 7 Landsat-5 and 5 Landsat-7 overpasses. The best model for water turbidity in the marsh explained 38% of...

Journal: :CoRR 2016
Jie Wang Luyan Ji Xiaomeng Huang Haohuan Fu Shiming Xu Congcong Li

There is a trend to acquire high accuracy land-cover maps using multi-source classification methods, most of which are based on data fusion, especially pixel-or feature-level fusions. A probabilistic graphical model (PGM) approach is proposed in this research for 30 m resolution land-cover mapping with multi-temporal Landsat and MODerate Resolution Imaging Spectroradiometer (MODIS) data. Indepe...

Journal: :Remote Sensing 2014
Nischal Mishra Md. Obaidul Haque Larry Leigh David Aaron Dennis L. Helder Brian L. Markham

This study evaluates the radiometric consistency between Landsat-8 Operational Land Imager (OLI) and Landsat 7 Enhanced Thematic Mapper Plus (ETM+) using cross calibration techniques. Two approaches are used, one based on cross calibration between the two sensors using simultaneous image pairs, acquired during an underfly event on 29–30 March 2013. The other approach is based on using time seri...

Journal: :Remote Sensing 2015
Liya Sun Karsten Schulz

Land cover classification has been widely investigated in remote sensing for agricultural, ecological and hydrological applications. Landsat images with multispectral bands are commonly used to study the numerous classification methods in order to improve the classification accuracy. Thermal remote sensing provides valuable information to investigate the effectiveness of the thermal bands in ex...

2015
Xiaohong Xiao Shimon Wdowinski Yonggang Wu

The aim of this study is to extract water body using the integrated features of Landsat ETM+ and ALOS PALSAR data. Water body extracted from Landsat ETM+ tends to lose smaller water bodies like small rivers and ponds. Besides, water area with plant (lotus) is difficult to recognize. ALOS PALSAR data have a much higher resolution, capable of extracting almost all the water bodies without confusi...

2017
Yan Zhou Jinwei Dong Xiangming Xiao Tong Xiao Zhiqi Yang Guosong Zhao Zhenhua Zou Yuanwei Qin Jun Xu

Open surface water bodies play an important role in agricultural and industrial production, and are susceptible to climate change and human activities. Remote sensing data has been increasingly used to map open surface water bodies at local, regional, and global scales. In addition to image statistics-based supervised and unsupervised classifiers, spectral indexand threshold-based approaches ha...

Journal: :Remote Sensing 2018
Josep Pardo-Pascual Elena Sánchez-García Jaime Almonacid-Caballer Jesús Palomar-Vázquez Enrique Priego de los Santos Alfonso Fernández-Sarría A. Balaguer-Beser

This paper evaluates the accuracy of shoreline positions obtained from the infrared (IR) bands of Landsat 7, Landsat 8, and Sentinel-2 imagery on natural beaches. A workflow for sub-pixel shoreline extraction, already tested on seawalls, is used. The present work analyzes the behavior of that workflow and resultant shorelines on a micro-tidal (<20 cm) sandy beach and makes a comparison with oth...

2012
J. P. Spruce J. C. Smoot J. T. Ellis K. Hilbert R. Swann

This paper discusses the development and implementation of a geospatial data processing method and multi-decadal Landsat time series for computing general coastal U.S. land-use and land-cover (LULC) classifications and change products consisting of seven classes (water, barren, upland herbaceous, nonwoody wetland, woody upland, woody wetland, and urban). Use of this approach extends the observa...

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