@InProceedings{SalgadoFormRudo:2011:CoMéGe,
               author = "Salgado, Mois{\'e}s Pereira Galv{\~a}o and Formaggio, 
                         Ant{\^o}nio Roberto and Rudorff, Bernardo Friedrich Theodor",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais - INPE} and {Instituto 
                         Nacional de Pesquisas Espaciais - INPE} and {Instituto Nacional de 
                         Pesquisas Espaciais - INPE}",
                title = "Compara{\c{c}}{\~a}o entre m{\'e}todos para gera{\c{c}}{\~a}o 
                         de modelos digitais de eleva{\c{c}}{\~a}o a partir de dados 
                         cartogr{\'a}ficos",
            booktitle = "Anais...",
                 year = "2011",
               editor = "Epiphanio, Jos{\'e} Carlos Neves and Galv{\~a}o, L{\^e}nio 
                         Soares",
                pages = "8880--8887",
         organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 15. (SBSR).",
            publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
              address = "S{\~a}o Jos{\'e} dos Campos",
             keywords = "interpolation algorithms, geoprocessing, geomorphology, algoritmos 
                         de interpola{\c{c}}{\~a}o geoprocessamento, geomorfologia.",
             abstract = "This paper aims to compare different methods to generate digital 
                         elevation models (DEM) of a catchment area, from digitized 
                         cartographic data. The selected study area was the Rocinha 
                         microbasin, located at south of Taubat{\'e} city, S{\~a}o Paulo 
                         state, Brazil. Eight different methods of interpolation were 
                         compared both by correlation analysis with the original data and 
                         by techniques of visual analysis. Correlation analysis allowed 
                         estimating the proportion of changes in the original elevation 
                         values caused by different interpolation methods, and the highest 
                         ratio found was 0.09% from the Kriging method. Despite the small 
                         proportions of changes in altitude values in cells intercepted by 
                         altimetric data, the cells that were not intercepted (located in 
                         the spaces between contour lines) showed considerable differences 
                         between the interpolation methods. The visual analysis of images 
                         generated using shaded relief, slope variation and bipolar 
                         differentiation technique allowed us to distinguish some artifacts 
                         produced by the different interpolation methods. We observed that 
                         the prevalence of artifacts occurs mainly in the plain areas, due 
                         to lower density of elevation data used in the interpolation 
                         process. We conclude that the selection of the interpolation 
                         method should consider the final application of DEM. Conventional 
                         methods of interpolation can disadvantage hydrological studies or 
                         applications that aim to calculate topographic variables from the 
                         DEM.",
  conference-location = "Curitiba",
      conference-year = "30 abr. - 5 maio 2011",
                 isbn = "{978-85-17-00056-0 (Internet)} and {978-85-17-00057-7 (DVD)}",
             language = "pt",
         organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                  ibi = "3ERPFQRTRW/3A4A8LB",
                  url = "http://urlib.net/ibi/3ERPFQRTRW/3A4A8LB",
           targetfile = "p0390.pdf",
                 type = "Cartografia, Fotogrametria, Lidar e Sensores",
        urlaccessdate = "13 maio 2024"
}