Priscilla Azevedo dos Santos

Ms. Priscilla Azevedo dos Santos

Earth Observation and Geoinformatics Department, National Institute for Space Research, São José dos Campos, São Paulo, Brazil
orcid
National Institute for Space Research - INPE

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 July 2025 in Remote Sensing
Verified
Journal Article
Open access
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Priscilla Azevedo dos SantosPriscilla Azevedo dos Santos
Priscilla Azevedo dos Santos
MAMarcos Adami
Marcos Adami
MPMichelle C. A. Picoli
Michelle C. A. Picoli
VPVictor Hugo Rohden Prudente
Victor Hugo Rohden Prudente
JEJulio Cesar Dalla Mora Esquerdo
Julio Cesar Dalla Mora Esquerdo
Michel Dantas ChavesMichel Dantas Chaves
Michel Dantas Chaves
Reliable remote sensing-based Land Use and Land Cover (LULC) information is crucial for assessing Earth’s surface activities. Brazil’s agricultural dynamics, including year-round cropping, multiple cropping, and regional climate variability, make LULC monitoring a highly challenging task. The country has thirteen remote sensing-based LULC products specifically tailored for this purpose. However, the differences and the results of these products have not yet been synthesized to provide coherent guidance in assessing their spatio-temporal agricultural dynamics and identifying promising approaches and issues that affect LULC analysis. This review represents the first comprehensive assessment of the advantages, challenges, and limitations, highlighting the main issues when dealing with contrasting LULC maps. These challenges include incompatibility, a lack of updates, non-systematic classification ontologies, and insufficient data to monitor Brazilian LULC information. The consequences include impacts on intercropping estimation, diminished representation or misrepresentation of croplands; temporal discontinuity; an insufficient number of classes for subannual cropping evaluation; and reduced compatibility, comparability, and spectral separability. The study provides insights into the use of these products as primary input data for remote sensing-based applications. Moreover, it provides prospects for enhancing existing mapping efforts or developing new national-level initiatives to represent the spatio-temporal variation of Brazilian agriculture.

3 October 2023 in Revista Brasileira de Ciência do Solo
Verified
Journal Article
Open access
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Priscilla Azevedo dos SantosPriscilla Azevedo dos Santos
Priscilla Azevedo dos Santos
HPHelena Pinheiro
Helena Pinheiro
WJWaldir Carvalho Junior
Waldir Carvalho Junior
ISIgor Leite da Silva
Igor Leite da Silva
NPNilson Rendeiro Pereira
Nilson Rendeiro Pereira
Marcos CeddiaMarcos Ceddia
Marcos Ceddia
Pedosphere-hydrosphere interface accounts for the association between soil hydrology and landscape, represented by topographic and Remote Sensing data support and integration. This study aimed to analyze different statistical radiometric and spectral data selection methods and dimensionality reduce environment-related data to support the classification of soil physical-hydric properties, such as soil basic infiltration rate (bir) and saturated hydraulic conductivity (Ksat); as well as to act in data mining processes applied to hydropedological properties digital mapping. Accordingly, research integrated information from Visible to Infrared (VIS-IR) spectral indices and Sentinel’s 2A mission Multispectral Instrument (MSI) sensor bands, terrain numerical modeling and aerogeophysics set to model soil-water content in two soil layers (0.00-0.20 m and 0.20-0.40 m). Pre-processed data were subjected to statistical analysis (multivariate and hypothesis tests); subsequently, the methods were applied (variation inflation factor - VIF, Stepwise Akaike information criterion – Stepwise AIC, and recursive feature elimination - RFE) to mine covariates used for Random Forest modeling. Based on the results, there were distinctions and singularities in spectral and radiometric data selection for each adopted method; the importance degree, and contribution of each one to soil physical-hydric properties have varied. According to the applied statistical metrics and decision-making criteria (highest R 2 and lowest RMSE / MAE), the chosen methods were RFE (0.00-0.20 m layers) and Stepwise AIC (0.20-0.40 m layers) - both concerned with the assessed variables (bir and Ksat). This approach captured the importance of environmental variables and highlighted their potential use in hydropedological digital mapping at Guapi-Macacu watershed.