@Article{CarneiroOliSanDobVaz:2020:ExSeSA,
author = "Carneiro, Arian Ferreira and Oliveira, Willian Vieira de and
Sant'Anna, Sidnei Jo{\~a}o Siqueira and Doblas Prieto, Juan and
Vaz, Daiane Vieira",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "Exploiting sentinel-1 SAR time series to detect grasslands in the
northern Brazilian amazon",
journal = "International Archives of the Photogrammetry, Remote Sensing and
Spatial Information Sciences",
year = "2020",
volume = "43",
number = "B3",
pages = "259--265",
month = "Aug.",
note = "2020 24th ISPRS Congress - Technical Commission III; Nice,
Virtual; France; 31 August 2020 through 2 September 2020",
keywords = "Remote sensing, Time series data, SAR, Image classification,
Grassland detection, Sentinel-1.",
abstract = "Recent advances in cloud-computing technologies and remote sensing
data availability foster the development of studies based on the
analysis of optical and SAR imagery time series. In this paper, we
assess the potential of Sentinel-1 imagery time series for
grassland detection in the northern Brazilian Amazon. We used the
Google Earth Engine cloud-computing platform as an alternative to
obtain and analyse Sentinel-1 imagery, acquired from 2017 to 2018
over the region of Moju{\'{\i}} dos Campos/PA, Brazil. We
extracted several temporal metrics from the imagery time series
and used the Random Forest algorithm to perform the
classification. In addition, we analysed the time series
considering different channels, including the VV and VH
polarizations, both separately and in combination, and the CR, RGI
and NL indices. We could efficiently discriminate areas of
grasslands from forest and agricultural crops using either VH time
features or features extracted from the combination of both VV and
VH polarizations. The classification map that resulted from the
combination of VV and VH data presented the highest accuracy, with
an overall accuracy of 95.33% and a 0.93 kappa index. Despite
simple, the approach adopted in this paper showed potential to
differ grasslands from areas of agriculture and forest in the
northern Brazilian Amazon.",
doi = "10.5194/isprs-archives-XLIII-B3-2020-259-2020",
url = "http://dx.doi.org/10.5194/isprs-archives-XLIII-B3-2020-259-2020",
issn = "0256-1840",
language = "en",
targetfile = "carneiro_exploiting.pdf",
urlaccessdate = "25 abr. 2024"
}