author = "Magalh{\~a}es, Mirella and Magalh{\~a}es, Salles and Alvim, 
                         Marcus Vinicius",
          affiliation = "{Universidade Federal de Vi{\c{c}}osa} and {Universidade Federal 
                         de Vi{\c{c}}osa} and {Universidade Federal de Vi{\c{c}}osa}",
                title = "Efficient viewshed computation on external memory DEM terrains",
            booktitle = "Proceedings...",
                 year = "2007",
               editor = "Gon{\c{c}}alves, Luiz and Wu, Shin Ting",
         organization = "Brazilian Symposium on Computer Graphics and Image Processing, 20. 
            publisher = "Sociedade Brasileira de Computa{\c{c}}{\~a}o",
              address = "Porto Alegre",
             keywords = "external memory, viewshed, DEM.",
             abstract = "Many GIS applications require efficient algorithms to manipulate 
                         huge volume of data about terrains stored in external memory. One 
                         of these applications is the viewshed computation which consists 
                         in obtaining the points that can be viewed by a given point. In 
                         this paper, we present an efficient algorithm to compute the 
                         viewshed on huge terrains stored in external memory.",
  conference-location = "Belo Horizonte",
      conference-year = "Oct. 7-10, 2007",
             language = "en",
           targetfile = "poster-Sibgrapi.pdf",
        urlaccessdate = "2020, Oct. 22"