Digital Terrain Model Dtm
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. High-resolution topography for Digital Terrain Model (DTM) in Keller Peninsula, Maritime Antarctica
Abstract High resolution topography (HRT) surveys is an important tool to model landscapes, especially in zones subjected to strong environmental changes, such as Antarctica, where landform is highly influenced by cryoclasty and permafrost melting. The aim of this work was to obtain a high accurate DTM for Keller Peninsula, Maritime Antarctica. The survey st
An. Acad. Bras. Ciênc.. Publicado em: 26/07/2018
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2. QUALITY OF A DIGITAL TERRAIN MODEL FOR SANTA CATARINA STATE
ABSTRACT: Relief characterization using a digital terrain model (DTM) is widely applied in erosion, soil and vegetation modeling. However, factors, such as acquisition technology and the spatial resolution of the digital model, affect modeling results. The aim of this study was to characterize noises in a DTM of the entire state of Santa Catarina recently ma
Eng. Agríc.. Publicado em: 2016-12
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3. Horizontal and vertical positional accuracy assement of cartographic products of the amazon region derived from interferometric sar data in X and P bands from ORBISAR sensor / Avaliação da acurácia posicional planialtimétrica de produtos cartográficos da Região Amazônica extraídos de dados SAR interferométricos nas bandas X e P do sensor ORBISAR
The Geographic Service of the Brazilian Army (DSG) is running a major mapping project in Brazil, called ´´Radiography Amazon", the region known as ´´Empty Mapping the Amazon." This area, approximately 1,8 million km$^2$, has not had, to date, appropriate land information mapping at scales larger than 1:250,000, except insufficient cartographic documents
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/11/2011
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4. Pedoforms mapping at the Águas Emendadas ecological station, Distrito Federal, Brazil.
The great urban and rural development of the Distrito Federal (Federal Administrative District) in Brazil over the last 50 years has led to disordered land use and land occupation. To assess the current environmental scenario, detailed surveys of the available natural resources, especially soils, are required. The objective of this work was to evaluate the s
In.: WORLD CONGRESS OF SOIL SCIENCE. Publicado em: 2011
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5. Pedoforms mapping at the Águas Emendadas ecological station, Distrito Federal, Brazil.
The great urban and rural development of the Distrito Federal (Federal Administrative District) in Brazil over the last 50 years has led to disordered land use and land occupation. To assess the current environmental scenario, detailed surveys of the available natural resources, especially soils, are required. The objective of this work was to evaluate the s
In.: WORLD CONGRESS OF SOIL SCIENCE. Publicado em: 2011
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6. Map quality evaluation and edge extraction of off-terrain objects on airbone laser scanner products. / Avaliação de qualidade cartográfica e extração de bordas de objetos não pertencentes ao terreno em produtos gerados pelo sistema de varredura a laser aerotransportado.
The airborne LASER scanner is competitive technology for surveys that generates digital surface models (DSM) and Digital Terrain Models (DTM). This technology suffered some resistance by the aerosurvey enterprise (and some users), but is conquering its market share due the amount of papers recently published in this field. A limitation associated with this t
Publicado em: 2009
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7. USE OF THE GEOPROCESSING AND THE HIGH-RESOLUTION IMAGE FOR THE ECOTOURISM PLANNING IN MORRO DO ELEFANTE - SANTA MARIA/RS / UTILIZAÇÃO DO GEOPROCESSAMENTO E IMAGEM DE ALTA RESOLUÇÃO PARA O PLANEJAMENTO DO ECOTURISMO NO MORRO DO ELEFANTE - SANTA MARIA/RS
The present paper has applied geoprocessing techniques in association with space high-resolution images in order to develop an experimental work by generating thematic maps which may be useful for the planning process of the ecotourism. The generated cartographic products were: ecotourism map, use of the land and vegetal covering, clinographic, hypsometric,
Publicado em: 2006
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8. Calibração dos modelos digitais de elevação gerados por interferometria SAR nas bandas PEX / x
The objective of this work is to evaluate and calibrate the altimetric models generated by techniques of interferometry SAR in X and P bands, as well as evaluating erros in the method used in the acquisition of ground data. The calibration was performed in order to compensate the interferometric methodology erros, acquisitions erros and ground control points
Publicado em: 2005
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9. Streamflow and sediment yield simulation within a small watershed through geoprocessing and modeling techniques. / Simulação de escoamento e de produção de sedimentos em uma microbacia hidrográfica utilizando técnicas de modelagem e geoprocessamento.
Hydrological and water quality models have been developed to evaluate the nonpoint source pollution in agricultural watershed. With this objective, SWAT (Soil and Water Assessment Tool) model was applied to simulate the streamflow and sediment yield in Ribeirão dos Marins watershed, on the Piracicaba river basin, Brazil, for the period 1999/2000. The applic
Publicado em: 2002
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10. Geoprocessamento aplicado a determinacao de volume e area do reservatorio hidreletrico de Serra da Mesa com imagens JERS-1/SAR / Geoprocessing applied to volume and area determination of Serra da Mesa hydroelectrical reservoir using JERS-1/SAR images
This paper presents a method for the determination of flooding parameters in hydroelectrical reservoirs. The method is based on the integration of Digital Terrain Model (DTM)and Remote Sensing data derived from JERS-1/SAR. The area and volume of the reservoir, considering different water levels, were determined using SPRING, a Geographical Information System
Publicado em: 1999
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11. Um método de ajuste de superfície para grades triangulares considerando linhas características / A triangular surface fitting method using breaklines
In order to produce realistic Digital Terrain Models (DTM), one needs to preserve the ridges and valley lines (the breaklines). The use of triangular grids allows us to model real surfaces with better accuracy, since there is no need for intermediate interpolations, as in the case with rectangular grids. However the visualization with triangular irregular ne
Publicado em: 1995
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12. Evaluation of beta-spline interpolation in digital terrain models / Avaliação do interpolador beta-spline em modelos digitais de elevação
The objective of this work is to study the B-Spline interpolator and evaluate its capabality to generate Digitais Elevation Models. The study area is localized in the periphery of the city of Belo Horizonte, the principal district of the state of Minas Gerais, This place have been chosen because it had digital format datas, and this made the ground survey mo
Publicado em: 1992