Comparação entre perfis altimétricos de cartas do IGC e IBGE com instrumentos de precisão na Fazenda Experimental Lageado - Botucatu - SP
Data
2018-02-28
Autores
Oliveira, Samuel Almeida Santos de
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Universidade Estadual Paulista (Unesp)
Resumo
A atividade agrícola tem importância significativa na economia, justificando diversas pesquisas que busquem a aquisição de informações e desenvolvimento de tecnologias para que os processos envolvidos sejam mais eficientes. A topografia, geodésia e geoprocessamento têm sido utilizados de forma crescente e de diversas formas, tanto para monitoramento, quanto para planejamento na gestão agronômica e dos recursos naturais. O presente trabalho foi realizado na Fazenda Experimental Lageado, em Botucatu-SP e teve por objetivo aferir cartas do IGC e IBGE em comparação com equipamentos de alta precisão, nas quais foram confeccionadas linhas de perfis altimétricos e interpolação dos valores de altimetria. A geoestatística foi utilizada para uma interpolação com predição de erros, na qual os semi-variogramas e a validação cruzada permitiram analisar a correlação espacial e variância dos dados estimados. Como resultados foram obtidos mapas de altimetria, declividade e respectivos residuais altimétricos absolutos para a mensuração da confiabilidade de cartas na classificação de relevo, como também, o uso de cartas para traçado de limites de confrontações naturais, como linhas de cumeada e grota. Pôde-se concluir que não é confiável utilizar as cartas para determinação de limites de confrontação natural como linhas de cumeadas e grotas para certificação de cadastro de registro de imóveis.
The agriculture has a significant importance in economy, demanding several researches that allow information acquisition and technology development aiming an enhancing of the processes involved. Land surveying, geodetic sciences and geoprocessing have been more applied, and in different ways for land monitoring, soil and nature resources management. The present essay was developed on the Experimental Farm Fazenda Experimental Lageado Botucatu – SP, Brazil and aimed an altimetry analysis of IGC and IBGE contour maps with accurate instruments as parameters, in which altimetry profile lines and interpolation of the altitude values were made. The kriging process was used, likewise the semi variogram model, and further the cross validation was made to achieve a known function for the altimetry value’s estimation, spatial correlation and value of variance. Digital elevation models, slope maps and the respective absolute altimetry residuals were made to measure the reliability of the IGC and IBGE contour maps as well as its usefulness for obtaining land topography and natural boundary from gardenbed or flume. It was concluded that the IGC and IBGE contour maps are not reliable for obtaining natural boundary from gardenbed or flume for certification of land registry in Brazil, although IGC contour maps were fine enough for morphometric analysis of small basins. IBGE contour maps as last option could be used for bigger basins analysis.
The agriculture has a significant importance in economy, demanding several researches that allow information acquisition and technology development aiming an enhancing of the processes involved. Land surveying, geodetic sciences and geoprocessing have been more applied, and in different ways for land monitoring, soil and nature resources management. The present essay was developed on the Experimental Farm Fazenda Experimental Lageado Botucatu – SP, Brazil and aimed an altimetry analysis of IGC and IBGE contour maps with accurate instruments as parameters, in which altimetry profile lines and interpolation of the altitude values were made. The kriging process was used, likewise the semi variogram model, and further the cross validation was made to achieve a known function for the altimetry value’s estimation, spatial correlation and value of variance. Digital elevation models, slope maps and the respective absolute altimetry residuals were made to measure the reliability of the IGC and IBGE contour maps as well as its usefulness for obtaining land topography and natural boundary from gardenbed or flume. It was concluded that the IGC and IBGE contour maps are not reliable for obtaining natural boundary from gardenbed or flume for certification of land registry in Brazil, although IGC contour maps were fine enough for morphometric analysis of small basins. IBGE contour maps as last option could be used for bigger basins analysis.
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georreferenciamento, topografia, morfometria, cadastro, imóveis, rurais, georeferencing, land, survey, surveying, morphometry, registration, cadastre