).ĭEMs allow from a simple three-dimensional visualization of the floor to more complex analyses, like volume calculations and generation of slope maps ( Felgueiras 1998 Felgueiras, C. These models consist of a computational mathematical representation of the distribution of a space phenomenon occurring within a region of the land surface ( Felgueiras 1998 Felgueiras, C. ).įor analysis, preparation and introduction procedures of these studies, the use of Digital Elevation Models (DEMs) is essential. Madrid: Escuela Técnica Superior de Ingenieros Industriales. At present, this study is necessary in portuary works, both in the construction and dredging of new ports leasing of gas pipelines and transoceanic telephone cables exploration of oil and other mineral resources environmental preservation research activities follow-up of erosion or silting-up processes, and, especially, in navigation ( Iho 2005 IHO. Since the early 19 th century, navigators have tried to better understand the seafloor. This affirmation alone would justify any study related to the submerged floor. Levantamentos batimétricos Interpoladores Krigagem inverso do quadrado da distância krigagem universalīrazil has an extensive coast and the largest hydrographic net of the world, with rivers that stand out in depth, width and extension. Através dos resultados pode-se constatar a superioridade do interpolador Krigagem Universal quanto à eficiência em criar MDP com base nos dados de levantamentos batimétricos.
Este estudo teve como objetivo analisar, comparativamente, a eficiência da Krigagem Universal (KU) e do Inverso Ponderado da Distância (IPD) na representação computacional de superfícies batimétricas, variando de forma decrescente a quantidade de pontos amostrais. Até o momento existem mais de 40 métodos de interpolação disponíveis na literatura, cada um com suas particularidades e características. No entanto, o produto resultante de uma batimetria é uma malha de pontos amostrais que, por si só, não é capaz de gerar diretamente o Modelo Digital de Profundidade (MDP), sendo necessário o uso de interpoladores. As profundidades dos corpos aquáticos, indispensáveis para a representação destes, são obtidas através dos levantamentos batimétricos. Through the results, we can be stated the superiority of the interpolator Universal Kriging in efficiency in creating DMD with basis in the bathymetric surveys data.īathymetric surveys Interpolators Kriging Inverse squared distance weighted universal krigingĪ representação do relevo submerso é de essencial importância em diversas áreas do conhecimento como em projetos para construção ou reavaliação de dimensões portuárias, instalação de moles, dutos, marinas, pontes, túneis, prospecção mineral, cursos de água, dragagem, controle de sedimentos de rios e lagos e outros. This study has the objective to analise, comparing, the efficiency of Universal Kriging (UK) and of the Inverse Distance Weighted (IDW) in the computational representation of bathymetric surfaces, varying in a decreasing way the quantity of sample points. Currently, there are more than 40 available scientific methods of interpolation, each one with its particularities and characteristics.
However, the result of a bathymetric sampling is a grid of points that, for itself, it is not capable of generating directly the Digital Model of Depth (DMD), being necessary the use of interpolators. The depths of the aquatic bodies, indispensable for the representation of those, are obtained through the bathymetric surveys. The representation of the submerged relief is very importance in diverse areas of knowledge such as Projects to build or reassess port dimensions, installation of moles, ducts, marinas, bridges, tunnels, mineral prospecting, waterways, dredging, silting control of river and lakes, and others.