@MastersThesis{Rolim:1992:AvUsTr,
author = "Rolim, Silvia Beatriz Alves",
title = "Avalia{\c{c}}{\~a}o do uso da transforma{\c{c}}{\~a}o IHS na
integra{\c{c}}{\~a}o de dados geof{\'{\i}}sicos
(aeromagnetometria) e de sensoriamento remoto (TM-LANDSAT) para a
investiga{\c{c}}{\~a}o geol{\'o}gica na {\'a}rea do Pojuca
(Serra dos Caraj{\'a}s, PA)",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "1992",
address = "Sao Jose dos Campos",
month = "1992-09-01",
keywords = "geologia, Amaz{\^o}nia (regi{\~a}o), Serra dos Caraj{\'a}s
(PA), geobot{\^a}nica, levantamento geol{\'o}gico, processamento
de imagens, transforma{\c{c}}{\~a}o (matem{\'a}tica),
fotografia a{\'e}rea, mapeador tem{\'a}tico (LANDSAT),
sat{\'e}lites LANDSAT, geobotany, geological surveys, image
processing, transformations (mathematics), aerial photography,
geology.",
abstract = "A regi{\~a}o Amaz{\^o}nica, apesar de possuir importantes
dep{\'o}sitos minerais em seus terrenos, e uma regi{\~a}o pouco
pesquisada, no que diz respeito {\`a}s rela{\c{c}}{\~o}es entre
a geologia, o relevo, os solos e a cobertura vegetal. Esta falta
de conhecimento e causada por v{\'a}rios fatores, tais como,
dificuldade de acesso a {\'a}rea, complexidade ambiental,
aus{\^e}ncia de estudos multidisciplinares, etc. Estes problemas
podem ser parcialmente resolvidos por meio do uso de dados de
sensoriamento remoto e de geof{\'{\i}}sica. Neste contexto, o
presente estudo foi baseado na extra{\c{c}}{\~a}o de
informa{\c{c}}{\~o}es geol{\'o}gicas, atrav{\'e}s da
integra{\c{c}}{\~a}o digital de dados de sensoriamento remoto
(TM-LANDSAT) e de geof{\'{\i}}sica (magnetometria),
utilizando-se a transforma{\c{c}}{\~a}o IHS (intensity, hue e
saturation). Para esta pesquisa foram utilizados os seguintes
dados: imagens digitais de magnetometria (redu{\c{c}}{\~a}o ao
polo e ao equador magn{\'e}ticos, susceptibilidade
magn{\'e}tica, primeiro e segundo derivativos e
continua{\c{c}}{\~a}o para cima) a partir do campo
magn{\'e}tico total, derivadas de perfis aerotransportados;
imagens TM-LANDSAT (6 bandas refletidas na faixa do
vis{\'{\i}}vel ao infravermelho); fotografias a{\'e}reas; mapas
geol{\'o}gicos e geobot{\^a}nicos. Os dados geof{\'{\i}}sicos
(perfis N-S) foram convertidos para grades regulares, com um
espa{\c{c}}amento de 30 metros e posteriormente, para imagens
digitais com o auxilio de um algoritmo de interpola{\c{c}}{\~a}o
Cubic Spline. Estas imagens foram integradas com as imagens TM, no
espa{\c{c}}o IHS, com o objetivo de promover uma melhor
visualiza{\c{c}}{\~a}o das corre{\c{c}}{\~o}es existentes
entre as informa{\c{c}}{\~o}es. Um mapa fotogeol{\'o}gico foi
confeccionado no contexto de subsidio aos resultados obtidos com a
transforma{\c{c}}{\~a}o IHS e no aperfei{\c{c}}oamento de
conhecimento geol{\'o}gico da {\'a}rea do Pojuca. Na
transforma{\c{c}}{\~a}o IHS foram integradas a primeira
componente principal das seis bandas utilizadas do TM (canal
intensidade)e a imagem transformada de redu{\c{c}}{\~a}o ao
equador (canal de hue). O produto final forneceu
informa{\c{c}}{\~o}es adicionais, principalmente, em
rela{\c{c}}{\~a}o {\`a}s fei{\c{c}}{\~o}es texturais e
topogr{\'a}ficas (componente principal) {"}coloridas{"} pelos
padr{\~o}es magn{\'e}ticos da {\'a}rea. Al{\'e}m disso, a
transforma{\c{c}}{\~a}o IHS confirmou a maioria das classes
geobot{\^a}nicas detectadas previamente para a {\'a}rea do
Pojuca. ABSTRACT: The Amazon region has very few geological
surveys, in spite of having several mineral districts. The
relationship between geology, reflief, soils and vegetation cover
is poorly investigated. This lack of knowledge is caused by many
factors, such as the non-accessibility to the area, its
environmental complexity, the absence of systematic and integrated
multidisciplinary studies, etc. These problems can be partially
solved by the use of remote sensing and geophysical data. In this
context, the present study was based on the extraction of
geological information from the digital integration of remote
sensing (LANDSAT-TM) and geophysical (magnetometry) data, using
the HIS transform. In order to perform this research, the
following data were analyzed: digital magnetic images (reduction
to magnetic equator and pole, magnetic susceptibility, first and
second derivatives, upward continuation) obtained from total field
image, derived from aerial profiles; TM-LANDSAT-5 images (6
reflective bands); aerial photographs; geological and geobotanical
maps. The geophysical data (N-s profiles) were converted to a
regular grid of 30m and subsequently, to a black and white digital
image with a Cubic Spline interpolation algorithm. These images
were integrated with TM-images in the IHS space, in order to
improve a better correlation between geological and geophysical
information. A photogeological map was done in order to compare
the HIS results and to improve the geological knowledge of the
Pojuca Test Area. The HIS transform combined the first principal
component of the six reflective LANDSAT bands (intensity channel)
and the reduction to magnetic equator transformed image (hue
channel). The final product provides additional information on the
textural and topographical features (principal components) colored
by the magnetic patterns. In addition, the HIS transform confirmed
many existing geobotanical classes in the study area.",
committee = "Paradella, Waldir Renato (orientador/presidente) and Dutra,
Luciano Vieira and Veneziani, Paulo and Miranda, Fernando Pellon
de",
copyholder = "SID/SCD",
englishtitle = "Evaluation of the IHS transformation use on the integration of
geophysical (aeromagnetometry) and remote sensing (TM-LANDSAT)
data for the geological investigation in the Pojuca area (Serra
dos Caraj{\'a}s, PA)",
label = "6671",
language = "en",
pages = "139",
ibi = "6qtX3pFwXQZ3r59YD6/GP5D6",
url = "http://urlib.net/ibi/6qtX3pFwXQZ3r59YD6/GP5D6",
targetfile = "publicacao.pdf",
urlaccessdate = "18 maio 2024"
}