Relação entre variáveis dendrométricas de eucaliptus e índices de vegetação obtidos com VANT

• Ano de defesa: 2017
• Autor(a) principal: Zás, Luis Roberto Telechea
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; Tecnologia em Agricultura de Precisão; UFSM; Programa de Pós-Graduação em Agricultura de Precisão; Colégio Politécnico da UFSM
• Palavras-chave em Português: Floresta de precisão; Sensoriamento remoto; Agricultura de precisão; Análise de correlação; Geoestatística; Precision forest; Remote sensing; Precision agriculture; Correlation analysis; Geostatistics; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
• Link de acesso: http://repositorio.ufsm.br/handle/1/21572

The goal of this paperwork is to study the relationship between dendrometric data and vegetation indexes in eucalyptus forest obtained from onboard UAV camera. The specific goals are: - To get dendrometric data and images in the visible and near infrared spectrum from the forest under study. - To calculate the vegetation indexes. - To define the correlation from the obtained data. - To spatialize the variables by geostatistics. The studied area of 11.7 ha is located in Tapes neighborhood on the Santa Helena rural property, from Mr. João Carlos Silveiro in a nine-year-old eucalyptus forest, where was carried out a sampling of trees to get the biometric measurements DBH (Diameter at Breast Height - 1.30m) and Total Height. Resources used in the sampling: One Skydrones Zangão UAV One Leica TS06 Plus Total Station Two Topcom GNSS Receivers The obtained data was computed with softwares ArcGIS 10.5; Autocad 2015; Erdas Imagine 2013; Google Earth Pro; CAR Registration Module; Microsoft Office suite; Topcon Tolls and GS+. The data collection was performed with a Canon 12-megapixel embedded camera. The camera was modified by removing the infrared filter and replacing with a filter in the red spectrum. Beyond the flight with NIR filter in the câmera, another flight was done using an R,G,B camera. The position difference of a target from mosaico of R,G,B and NIR,G,B bands reached few meters and dozens of meters in other parts, depending on the mosaic location. It was defined in this scenario to identify targets on the mosaic and track back its coordinates on field and it was performed a new georeferencing. With the control points tracked back for georeferencing of the mosaic, it was also performed a biometric measurement of georeferenced samples of eucalyptus using one total station. A total of 24 homogeneously distributed samples in the studied área were measured with following parameters: Tree position (coordinates), diameter at breast height (1.30 m) and total height of the tree.