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- Title
Análise da Estabilidade da Rede Geodésica Altimétrica Local Densificada no Campus Recife da UFPE.
- Authors
de Vasconcelos Silva, Ermerson; de Seixas, Andréa
- Abstract
This work has the objective to analyze the stability of the implanted altimetric geodesic structures in the Recife Campus of the Federal University of Pernambuco (UFPE) in a period of one year (2015 to 2016). In this sense, fourteen references levels (RRNN) were materialized and distributed among the Centers of the University City. The local altimetric geodetic network is composed of seven pins of semispherical surfaces encrusted in the bases and seven pins embedded in the pillars of the cadastral reference network. Besides these, the altimetric network have five auxiliary references levels, materialized between the wires means, two references levels embedded in the structure of two pillars of the Center of Technology and Geosciences (CTG) building and three references levels from the High Precision Altimetric Network (RAAP) of the IBGE and one reference level of the verification and rectification base of optics levels. For the survey of the altimetric geodesic structures, a very high precision digital level was used (ISO 17123-2, 2001), bar code scan and the method of geometric levelling, having as base the current norms in Brazil. Measurements occurred in six occasions (one in November 2015, one in February 2016, two in May 2016 and two in December 2016). For the control and analysis of the qualities, the least squares method (MMQ)-parametric model was considered. An analysis of variances (ANOVA) was performed using the Tukey and Sheffé tests. The stability analysis considered the network raised and adjusted in November 2015 as an altimetric and metrological reference standard. With respect to the structures that make up the cadastral reference network in relation to the pins of semispherical surfaces and pins embedded in the pillars, it was verified that there was, obtaining a lower variation of discrepancies in modulus in RNEPS04 of 0.59 mm and P-EPS04 of 0.38 mm and a greater variation of discrepancy in modulus in RNEPS01 of 5.35 mm and P-EPS05 of 5.50 mm. The discrepancies were verified from the respective adjusted altitudes and the analysis of variances.
- Subjects
RECIFE (Brazil); LEAST squares; ANALYSIS of variance; BAR codes; INTERNATIONAL Organization for Standardization; QUALITY control; ALTITUDES
- Publication
Anuario do Instituto de Geociencias, 2019, Vol 42, Issue 2, p350
- ISSN
0101-9759
- Publication type
Article
- DOI
10.11137/2019_2_350_365