7 articles in this issue
Luciano Aparecido Barbosa,Henrique Cândido de Oliveira,Wagner Carrupt Machado,Diogenes Cortijo Costa
A necessidade de avaliação do GNSS sempre esteve sempre ligada à necessidade de posicionamento de avaliação. Usado na utilização ainda, como posicionaisam mais em aplicações terrestres com a popularidade do GNSS. No entanto, o ambiente terrestre tem muita... see more
Daniel Callahan,Mike Mustafa Berber
3D Elevation Program (3DEP) aims to generate and disseminate high-resolution topographic elevation data from the source data products including lidar point clouds, original DEMs from which the 3DEP standard DEM datasets were produced, and additional data ... see more
Italo Oliveira Ferreira,Laura Coelho de Andrade,Victoria Gibrim Teixeira,Felipe Catão Mesquita Santos
Technological advances in bathymetric equipment, positioning capacity, data processing, as well as the development of new ways of obtaining depth and other ways of exploring the submerged bottom, have been noticed in recent years. It is known that acousti... see more
Laura Coelho de Andrade,Italo Oliveira Ferreira,Arthur Amaral e Silva,Victoria Teixeira Gibrim,Felipe Catão Mesquita Santos
The use of acoustic systems for mapping submerged areas is the most accurate way. However, echosounders are expensive and, in addition, the equipment requires a great deal of experience on the part of the specialist. From another perspective, orbital and ... see more
Christian Gonzalo Pilapanta Amagua,Jorge Felipe Euriques,Sergio da Conceição Alves,Claudia Pereira Krueger
In recent years, the ability of GNSS systems to estimate high accuracy 3D positions has greatly contributed to the development of new monitoring techniques aimed at understanding the mechanisms by which the different Earth processes are generated. This pa... see more
Danilo Fernandes de Medeiros,Giuliano Sant’Anna Marotta,Carlos Alberto Moreno Chaves,George Sand Leão Araújo de França
The extensive use of GNSS positioning, combined with the importance of precise geoid heights for transformation between geodetic and orthometric heights, brings up the discussion of the influence of data uncertainties and the use of variable density value... see more
Andrew Carey Ruffhead
Multiple regression equations (MREs) provide an empirical direct method of transforming coordinates between geodetic datums. Since they offer a means of modelling distortions, they are capable of a more accurate fit to datum-shift datasets than more basic... see more