RSS 1.0Artigos - Cartografia - FCT
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Uncertainty analysis of a spatiotemporal model for submerged vegetation colonization
Batista, Ligia Flávia Antunes
; Imai, Nilton Nobuhiro ; Da Silva Rotta, Luiz Henrique ; Watanabe, Fernanda Sayuri Yoshino ; Velini, Edivaldo Domingues (Accuracy 2012 - Proceedings of the 10th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, 2012) [Trabalho apresentado em evento]
This work presents an uncertainty analysis applied to the results of an ecological model. This model describes the development of submerged macrophytes colonization in a brazilian reservoir, between Sao Paulo and Parana ... -
A measure of ionospheric irregularities: zonal velocity and its implications for L-band scintillation at low-latitudes
; ; ; ; ; ; Monico, Joao Francisco Galera; ; ; (Earth and Planetary Physics, 2021) [Artigo]
We estimate the zonal drift velocity of small-scale ionospheric irregularities at low latitude by leveraging the spaced-receivers technique applied to two GNSS receivers for scintillation monitoring installed along the ... -
Geometrical correction of CBERS-4/PAN images with generalized models using as reference national system of land management data
; Junior, José Marcato; Tommaselli, Antonio Maria Garcia (Anuario do Instituto de Geociencias, 2018) [Artigo]
The orbital images have been widely used in several applications in the Earth observation context, which require different levels of detail and positional accuracy. The China-Brazil Earth Resources Satellite Program (CBERS) ... -
Análise de séries temporais de coordenadas estimadas com GPS: Uma proposta metodológica para detecção, remoção e recuperação de efeitos sazonais
Rosa, Guilherme Poleszuk dos Santos; Monico, João Francisco Galera ; Chaves, João Carlos (Boletim de Ciencias Geodesicas, 2010) [Artigo]
GPS active networks are more and more used in geodetic surveying and scientific experiments, as water vapor monitoring in the atmosphere and lithosphere plate movement. Among the methods of GPS positioning, Precise Point ... -
Ajustamento de redes GPS em conformidade com as exigências da lei 10.267/2001
da Silva, Heloísa Alves; Monico, João Francisco Galera (Boletim de Ciencias Geodesicas, 2009) [Artigo]
In Brazil, there have been several GPS applications and with the introduction of the Law 10.267/2001 that among other dispositions, deals with georeferencing of the rural parcels. However, most commercial softwares of ... -
A influência das injunções de orientação relativa na calibração de um sistema dual de câmaras digitais
Bazan, Wimerson Sanches; Tommaselli, Antonio Maria Garcia ; Galo, Mauricio ; Ruy, Roberto da Silva (Boletim de Ciencias Geodesicas, 2009) [Artigo]
Image acquisition systems based on multi-head arrangement of digital frame cameras, such as the commercial systems DMC, UltraCam, besides others, are attractive alternatives enabling larger imaging area when compared to a ... -
Análise do modelo troposférico empregado na geração de uma estação de referência virtual utilizando o posicionamento por ponto preciso
Alves, Daniele Barroca Marra; Monico, João Francisco Galera ; Dalbelo, Luiz Fernando Antonio (Boletim de Ciencias Geodesicas, 2009) [Artigo]
In the past few years the interest is accomplishing a high accuracy positioning increasing. One of the methods that has been applied by the scientific community is the network based on positioning. By using multiple reference ... -
Modelagem de distorções entre sad 69 e sirgas 2000 pelo método de shepard e grades regulares
Magna Júnior, João Paulo; Camargo, Paulo de Oliveira ; Galo, Maurício (Boletim de Ciencias Geodesicas, 2009) [Artigo]
Brazil follows the tendency of some countries to update and/or review their fundamental geodetic network. The adoption of geocentric referentials like SIRGAS 2000, the new official reference system of the Geodetic Brazilian ... -
Extração automatica de segmentos lineares de rodovias em imagens de resoluções variadas
; dal Poz, Aluir Porfírio (Boletim de Ciencias Geodesicas, 2009) [Artigo]
In this paper a methodology for automatic extraction of road segments from images with different resolutions (low, middle and high resolution) is presented. It is based on a generalized concept of lines in digital images, ... -
Desempenho do modelo global da ionosfera do IGS: Avaliação no posicionamento por ponto na região sul do Brasil em período de alta atividade solar
; ; Camargo, Paulo de Oliveira (Boletim de Ciencias Geodesicas, 2009) [Artigo]
One of the main drawbacks of the GPS accuracy for L1 users is the error due to ionosphere. This error depends on the total electron content presents in the ionosphere, as well as of the carrier frequency. Some models have ... -
Detecção e afinamento de bordas em direções previamente conhecidas
Artero, Almir Olivette; Tommaselli, Antonio Maria Garcia (Boletim de Ciencias Geodesicas, 2009) [Artigo]
This work presents a study on the generation of digital masks aiming at edge detection with previously known directions. This solution is important when edge direction is available either from a direction histogram or from ... -
Snakes-based approach for extraction of building roof contours from digital aerial images
(Accuracy 2012 - Proceedings of the 10th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, 2012) [Trabalho apresentado em evento]This paper presents a method for building roof contour extraction from digital images taken over complex urban scenes. The proposed method is based on a snakes-based energy function that represents building roof contours ... -
Rectilinear building roof contour extraction based on snakes and dynamic programming
(International Journal of Applied Earth Observation and Geoinformation, 2013) [Artigo]This paper presents a method for extracting building roof contours from digital images collected over urban landscapes. The proposed method utilizes an energy function based on snakes that represents building roof contours ... -
Uso de dados fotogramétricos no refinamento geométrico de contornos de telhados de edifícios extraídos de dados laser
Dal Poz, Aluir P.; Habib, Ayman F. ; Marcato, Vanessa Jordão ; Correia, Larissa de Souza (Boletim de Ciencias Geodesicas, 2009) [Artigo]
In this paper, a methodology is proposed for the geometric refinement of laser scanning building roof contours using high-resolution aerial images and Markov Random Field (MRF) models. The proposed methodology takes for ... -
Extração automática de contornos de telhados usando dados de varredura a laser e campos randômicos de Markov
; Dal Poz, Aluir Porfírio; (Boletim de Ciencias Geodesicas, 2008) [Artigo]
This paper proposes a methodology for automatic extraction of building roof contours from a Digital Elevation Model (DEM), which is generated through the regularization of an available laser point cloud. The methodology ... -
O estado da arte em referenciais geodésicos: ITRF2000 e as próximas realizações do ITRS
(Boletim de Ciencias Geodesicas, 2005) [Artigo]In this paper is presented a brief historic of the ITRS realizations, giving details of the most recent, ITRF2000, as well as the parameters involved in the transformation among them. Some deficiencies of ITRF2000 are ... -
The GNSS NavAer INCT Project Overview and Main Results
Monico, João Francisco Galera; ; ; ; Shimabukuro, Milton Hirokazu ; Alves, Daniele Barroca Marra ; ; Camargo, Paulo de Oliveira ; ; et al. (Journal of Aerospace Technology and Management, 2022) [Artigo]
Air navigation is increasingly dependent on the use of Global Navigation Satellite Systems (GNSS). It allows the determination of the aircraft’s position in all phases of the flight and brings many advantages. Although ... -
Airborne LASER bathymetric data applicability to Nautical Cartography: Case study for Fernando de Noronha
; Galo, Maurício (Anuario do Instituto de Geociencias, 2021) [Artigo]
A Hydrographic Survey (HS) has as main goal to obtain data for editing and updating nautical documents, these, focused on the safety of navigation. In order to establish a standard of uncertainty parameters for nautical ... -
Impact and synergies of GIM error estimates on the VTEC interpolation and single-frequency PPP at low latitude region
Jerez, Gabriel O.; ; ; da Silva, Crislaine Menezes ; Alves, Daniele B. M. ; Monico, João F. G. (GPS Solutions, 2022) [Artigo]
The vertical total electron content (VTEC) is one of the key quantities to describe variations of the ionosphere and can be provided to users to correct the ionospheric disturbances for GNSS (Global Navigation Satellite ... -
Assessing ZWD models in delay and height domains using data from stations in different climate regions
; ; Alves, Daniele Barroca Marra; ; Gouveia, Tayná Aparecida Ferreira (Applied Geomatics, 2022) [Artigo]
Global Navigation Satellite System (GNSS) has revolutionized activities involving geodetic positioning. To achieve a desired accuracy, it is essential to model the atmosphere in an appropriate way. With respect to the ...