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	Provedor de dados Acta Amazonica (1) ArchiMer (1) Autor ANDRADE,Mariana Silva (1) ASSIS,Mauro (1) CANTINHO,Roberta Zecchini (1) GORGENS,Eric Bastos (1) OMETTO,Jean Pierre Henry Balbaud (1) REIS,Cristiano Rodrigues (1) SATO,Luciane (1) Viellefon, Priscille (1) Mais... Palavra-chave Digital terrain model (2) ALS (1) Abyssal hill structures (1) Airborne LiDAR (1) Bathymetric data (1) Cartographie marine (1) Central North Atlantic mid (1) DTM (1) Data process (1) Données bathymétriques (1) Dorsale (1) Ground filter (1) Ifremer (1) Multibeam echo sounder (1) Multifaisceaux (1) Ocean mapping (1) Ocean ridge (1) Océan Atlantique Nord central (1) Plate tectonic movements (1) Polymetallic sulphides (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Text (1) Ano 2020 (1) 2018 (1) País Brazil (1) France (1) Idioma Francês (1) Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Cartographie – Compilation et analyses numériques de données bathymétriques sur la dorsale Atlantique Nord centrale ArchiMer Viellefon, Priscille. Today, only 15% of the global ocean floor has been mapped at a high resolution of around 100 meters. The French Research Institute for the Exploitation of the Sea (Ifremer) participates in the acquisition of high-resolution seafloor depth data called "bathymetric data", by deploying its oceanographic vessels equipped with multibeam echo sounders. This internship within the ocean mapping service of Ifremer allowed, firstly, the processing of raw bathymetric data, acquired between 1991 and 2018 over the central North Atlantic mid-ocean ridge, and to compile them in digital terrain models. These models are necessary to improve geologic investigations, and they are available to scientists in Ifremer and elsewhere. The models also contribute to international... Tipo: Text Palavras-chave: Cartographie marine; Données bathymétriques; Dorsale; Ifremer; Océan Atlantique Nord central; Sondeur; Multifaisceaux; Structures abyssales; Sulfures polymétalliques; Tectonique des plaques; Traitement de données; Abyssal hill structures; Bathymetric data; Central North Atlantic mid; Ocean ridge; Data process; Digital terrain model; Ifremer; Multibeam echo sounder; Ocean mapping; Plate tectonic movements; Polymetallic sulphides. Ano: 2020 URL: https://archimer.ifremer.fr/doc/00679/79153/81664.pdf Airborne laser scanning for terrain modeling in the Amazon forest Acta Amazonica ANDRADE,Mariana Silva; GORGENS,Eric Bastos; REIS,Cristiano Rodrigues; CANTINHO,Roberta Zecchini; ASSIS,Mauro; SATO,Luciane; OMETTO,Jean Pierre Henry Balbaud. ABSTRACT Very few studies have been devoted to understanding the digital terrain model (DTM) creation for Amazon forests. DTM has a special and important role when airborne laser scanning is used to estimate vegetation biomass. We examined the influence of pulse density, spatial resolution, filter algorithms, vegetation density and slope on the DTM quality. Three Amazonian forested areas were surveyed with airborne laser scanning, and each original point cloud was reduced targeting to 20, 15, 10, 8, 6, 4, 2, 1, 0.75, 0.5 and 0.25 pulses per square meter based on a random resampling process. The DTM from resampled clouds was compared with the reference DTM produced from the original LiDAR data by calculating the deviation pixel by pixel and summarizing it... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ground filter; Airborne LiDAR; Digital terrain model; DTM; ALS. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000400271 Registros recuperados: 2 Primeira ... 1 ... Última

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