Rede De Referência Municipal Para Estações Livres: Uma Proposta De Baixo Custo E Grande Abrangência

Klein, Ivandro; Guzatto, Matheus Pereira; Hasenack, Markus; Cabral, Cesar Rogério; Lima, Arthur Peixoto Berbert; Fritsche, Stefan; Regina, Luiz Alberto Miranda; Momo, Gabriel Feldmann

doi:10.14393/rbcv69n3-44346

Cited by 3 publications

(6 citation statements)

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“…For the zenith angles, the closer to 90° (horizontal line of sight), the lower will be the influence of the θ. Klein et al (2017) show a real case of geodetic network implementation in an urban area, where geodetic markers were placed in strategic points of high visibility, such as on top of hills and buildings (Figure 7). From possible line of sights of the geodetic network markers on the ground, Figure 7 shows zenith angles measured at 68° and 69° (A014 for P5 and A002 for P2, respectively).…”

Section: Resultsmentioning

confidence: 99%

Section: On Page 9 Where It Readsmentioning

confidence: 99%

“…The choice of the geodetic markers location takes into account the environments with full technical conditions for the GNSS positioning, this is, areas free from obstacles to signal tracking, in order to ensure homogeneity and positional quality. However, the positioning in urban environments requires the densification of geodetic network markers close to the survey locations, allowing economy, reduction in the propagation of errors, and optimizing field-operating procedures (Klein et al 2017). There are cases where the densification of the geodetic network by positioning techniques with total station is necessary, due to the quality of the GNSS positioning in urban canyons (Deambrogio and Julien 2013;Klein et al 2017;Osada et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…However, the positioning in urban environments requires the densification of geodetic network markers close to the survey locations, allowing economy, reduction in the propagation of errors, and optimizing field-operating procedures (Klein et al 2017). There are cases where the densification of the geodetic network by positioning techniques with total station is necessary, due to the quality of the GNSS positioning in urban canyons (Deambrogio and Julien 2013;Klein et al 2017;Osada et al 2017). It is emphasized that even in rural environments there may be inadequate conditions for GNSS positioning (INCRA 2013).…”

Section: Introductionmentioning

confidence: 99%

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The Influence of the Deflection of the Vertical on Geodetic Surveys in Brazil

2021

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The densification of geodetic surveys using classical positioning techniques such as total stations may be necessary due to the quality of Global Navigation Satellite System (GNSS) positioning in urban canyons. However, the correction of distances and angles due to the deflection of the vertical (DV) is usually neglected in commercial softwares and internal software of total stations. Given that context, this research seeks to estimate the influence of DV on the horizontal geodetic positioning with total station in the Brazilian territory. Secondarily, it seeks to demonstrate the practical application of DV in the densification of geodetic networks. It is important to note that land surveys in Brazil must be connected to a geodetic network; therefore, the neglect of DV may degrade the positional quality of geodetic surveys. Results obtained indicate differences in horizontal geodetic positions of up to 45 ppm. Considering the desired positional quality of the geodetic network, such values demonstrate the importance of a proper correction for the DV.

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Section: Resultsmentioning

confidence: 99%

Section: On Page 9 Where It Readsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Influence of the Deflection of the Vertical on Geodetic Surveys in Brazil

2021

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“…No entanto, a densificação da RRCM ao nível do levantamento deve ser efetuada de forma gradual à medida que os profissionais necessitem de vértices mais próximos aos pontos a serem levantados. Ressalta-se ainda que no ambiente urbano nem sempre há condições para o rastreio adequado de sinais GNSS, devendo-se então utilizar métodos de levantamento com estação total (KLEIN et al, 2017).…”

Section: A Importância Da Rede De Referência Cadastralunclassified

O método do alinhamento para a densificação de rede de referência cadastral municipal - RRCM

Cabral,

Oliveira,

Hasenack

et al. 2023

R. bras. Geom.

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O método do alinhamento, devido as suas características, foi recentemente incluído na norma técnica brasileira NBR14166/2022 que estabelece os critérios para a implantação e densificação de uma rede de referência cadastral municipal (RRCM). A implantação de RRCM surge como condição básica de todos os sistemas de informações de natureza geoespacial, considerando as exigências cada vez maiores de planejamento e gestão dos municípios de conhecerem melhor seus territórios. Para a aplicação do método do alinhamento foi realizada, em uma rede já estabelecida, a implantação de dois pontos para fins de densificação da rede, utilizando estação total e os acessórios previsto na NBR14166/2022, sendo a materialização realizada de duas formas previstas na mesma, parafuso e furo. Pouco difundida entre os agrimensores brasileiros esta técnica proporciona, pela sua simplicidade, praticidade e precisão no levantamento e no ajustamento dos pontos, a determinação das coordenadas de forma rápida e segura. Todo o procedimento descrito na NBR14166/2022 foi validado em campo comprovando sua eficácia em termos de aplicabilidade.

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The quality of OpenStreetMap in a large metropolis in northeast Brazil: Preliminary assessment of geospatial data for road axes

et al. 2020

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This paper evaluates the data quality of road axes using the OpenStreetMap (OSM) collaborative mapping platform. OSM was chosen owing to the abundance of data and registered contributors (~ 6 million). We assumed the OSM collaborative data could complement the reference mappings by its quality parameters. We used the cartographic quality indicators of positional accuracy, thematic accuracy, and completeness to validate vector files from OSM. We analyzed the positional accuracy of linear features and we developed the automation of the positional accuracy process. The tool verified the completeness of road axes and thematic accuracy. The positional accuracy of linear features was also used, performed to obtain a range of scales, which reflected the characteristics of mapped areas and varied from 1:22,500 to 1:25,000. The completeness of road axes was 82% of the checked areas. By evaluating the thematic accuracy, we found that the absence of road axes toponymy in editions caused errors in the OSM features (i.e., 58% of road axes without information). As such, we concluded that collaborative data complements the reference cartography by measuring the heterogeneity of information in various regions and filtering the OSM data, despite its being useful for certain analyses.

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Rede De Referência Municipal Para Estações Livres: Uma Proposta De Baixo Custo E Grande Abrangência

Cited by 3 publications

References 3 publications

The Influence of the Deflection of the Vertical on Geodetic Surveys in Brazil

The Influence of the Deflection of the Vertical on Geodetic Surveys in Brazil

O método do alinhamento para a densificação de rede de referência cadastral municipal - RRCM

The quality of OpenStreetMap in a large metropolis in northeast Brazil: Preliminary assessment of geospatial data for road axes

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