@InProceedings{FelgueirasOrtSanCamSan:2019:AsAlAc,
               author = "Felgueiras, Carlos Alberto and Ortiz, Jussara de Oliveira and 
                         Santos, Cl{\'a}udia Cristina dos and Camargo, Eduardo Celso Gerbi 
                         and Sant'Anna, Sidnei Jo{\~a}o Siqueira",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Assessment to the altimetric accuracy of digital elevation models 
                         obtained from drone image information",
            booktitle = "Anais...",
                 year = "2019",
               editor = "Gherardi, Douglas Francisco Marcolino and Sanches, Ieda DelArco 
                         and Arag{\~a}o, Luiz Eduardo Oliveira e Cruz de",
                pages = "1974--1977",
         organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 19. (SBSR)",
            publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
              address = "S{\~a}o Jos{\'e} dos Campos",
             keywords = "altimetric accuracy, digital elevation models, direct and cross 
                         validations, drone images, SRTM grids.",
             abstract = "This research article aims to evaluate the altimetric accuracy of 
                         Digital Elevation Models (DEMs) generated from remote sensing 
                         images acquired by digital cameras transported in unmanned aerial 
                         vehicles generically known as Drones. The DEMs generation was 
                         carried out with the software Pix4D using as input the images of 
                         the drone flights and control points of high planimetric and 
                         altimetric accuracy acquired in field works by Global Positioning 
                         System (GPS) equipment. The DEMs have spatial resolution of 1 
                         meter and their altimetric qualities were evaluated by cross 
                         validations using the set high accuracy control points. The 
                         methodology of this work was applied to actual information within 
                         three geographic regions in the municipality of Jacare{\'{\i}}, 
                         S{\~a}o Paulo, Brazil. The work presents qualitative and 
                         quantitative analysis of the results considering altimetric error 
                         metrics, statistics and quadratic mean errors, for the DEMs 
                         obtained by drones and for Shuttle Radar Topography Mission (SRTM) 
                         elevation grids available at no cost on the internet. Comparative 
                         analyzes of the results considering soil cover information, 
                         observed through remote sensing images of the RapidEye satellite, 
                         were performed too. The results show that the drone DEMs have 
                         altimetric accuracy of less than 1 meter, but with different 
                         values in the three regions observed. As expected, the altimetric 
                         accuracy was lower for the SRTM data, since its spatial resolution 
                         is 30 meters.",
  conference-location = "Santos",
      conference-year = "14-17 abril 2019",
                 isbn = "978-85-17-00097-3",
             language = "pt",
         organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                  ibi = "8JMKD3MGP6W34M/3UB33CL",
                  url = "http://urlib.net/ibi/8JMKD3MGP6W34M/3UB33CL",
           targetfile = "98035.pdf",
                 type = "VANTs, videografia e alta resolu{\c{c}}{\~a}o",
        urlaccessdate = "27 abr. 2024"
}