Boletim de Ciências Geodésicas

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A QUANTITATIVE EVALUATION OF DGPS PERFORMANCE IN THE POSITION AND PSEUDORANGE DOMAINS

Erly Caldas de Lima

Rodrigo de Sousa Pissardini

Rafael Henrique de Oliveira

Edvaldo Simões da Fonseca

Jorge Pimentel Cintra

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Abstract: This study compares in quantitative terms two methods of differential corrections to GPS positioning from the code-based pseudoranges. The differential method calculated from the coordinates (Latitude, Longitude and Altitude), called Position-Domain DGPS, has

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DOI: https://doi.org/10.1590/s1982-21702019000400023

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LANDMARKS EVALUATION WITH USE OF QR-CODE FOR POSITIONING INDOOR ENVIRONMENT

Amanda Pereira Antunes

Luciene Stamato Delazari

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Abstract: People tend to lose their sense of direction in closed environments and the role of indoor maps is to assist the user in navigating in these spaces, through understanding the environment, identifying reference points or positioning. Among the several forms of

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DOI: https://doi.org/10.1590/s1982-21702019000400024

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ERROR BEHAVIOR OF ATOMIC CLOCKS ABOARD GPS SATELLITES

Gustavo Bento Mansur

Luiz Danilo Damasceno Ferreira

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Abstract: The signal transmission and position quality obtained by GNSS positioning directly depends on the time control. The atomic clocks aboard the satellites are responsible for this control. In this research, the satellites clock errors of GPS are studied, using d

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DOI: https://doi.org/10.1590/s1982-21702019000400027

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A PROPOSAL FOR MODELING AND IMPLEMENTING AN INTEGRATED SYSTEM FOR BRAZILIAN CADASTRES ACCORDING TO ISO 19152:2012 LAND ADMINISTRATION DOMAIN MODEL

Nathalia Rose Silva da Purificação

Andrea Flávia Tenório Carneiro

Rui Pedro Julião

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Abstract: This article proposes the modelling and implementation of an integrated system for Brazilian cadastres, based on the standardized model of land administration described in the ISO 19152:2012 LADM. The model was developed from the identification of the essenti

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DOI: https://doi.org/10.1590/s1982-21702019000400026

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THE USE OF THE AUTOMATED DIGITAL ZENITH CAMERA SYSTEM IN ISTANBUL FOR THE DETERMINATION OF ASTROGEODETIC VERTICAL DEFLECTION

Müge Albayrak

Kerem Halıcıoğlu

Mustafa Tevfik Özlüdemir

Burak Başoğlu

Rasim Deniz

Allison RB Tyler

Mohammed Mohseni Aref

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Abstract: The Digital Zenith Camera Systems (DZCSs) are dedicated astrogeodetic instruments used to obtain highly accurate astrogeodetic vertical deflection (VD) data. The first Turkish DZCS, the Astrogeodetic Camera System (ACSYS), was developed in Istanbul, Turkey in

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DOI: https://doi.org/10.1590/s1982-21702019000400025

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SPATIAL OUTLIERS DETECTION ALGORITHM (SODA) APPLIED TO MULTIBEAM BATHYMETRIC DATA PROCESSING

Italo Oliveira Ferreira

Afonso de Paula dos Santos

Júlio César de Oliveira

Nilcilene das Graças Medeiros

Paulo César Emiliano

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Abstract: The amount of data produced in an echosounder has increased dramatically with scanning systems such as multibeam echo sounders and interferometric sonars, providing a considerable improvement in the submerged terrain representation, especially when it comes t

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DOI: https://doi.org/10.1590/s1982-21702019000400020

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G-SIVAR: A GLOBAL SPATIAL INDICATOR BASED ON VARIOGRAM

Cláudia Cristina Baptista Ramos Naizer

David Souza Rodrigues

Jorge Ubirajara Pedreira

Cira Souza Pitombo

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Abstract: Among the exploratory spatial data analysis tools, there are indicators of spatial association, which measure the degree of spatial dependence of analysed data and can be applied to quantitative data. Another procedure available is geostatistics, which is bas

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DOI: https://doi.org/10.1590/s1982-21702019000400022

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