Landsat 8 Multispectral and Pansharpened Imagery Processing on the Study of Civil Engineering Issues

Abstract

Commission VIII, WG VIII/8 KEY WORDS: Landsat 8, pansharpened, image interpretation, supervised classification, land cover ABSTRACT:Scientific and professional interests of civil engineering mainly include structures, hydraulics, geotechnical engineering, environment, and transportation issues. Topics included in the context of the above may concern urban environment issues, urban planning, hydrological modelling, study of hazards and road construction. Land cover information contributes significantly on the study of the above subjects. Land cover information can be acquired effectively by visual image interpretation of satellite imagery or after applying enhancement routines and also by imagery classification. The Landsat Data Continuity Mission (LDCM -Landsat 8) is the latest satellite in Landsat series, launched in February 2013. Landsat 8 medium spatial resolution multispectral imagery presents particular interest in extracting land cover, because of the fine spectral resolution, the radiometric quantization of 12bits, the capability of merging the high resolution panchromatic band of 15 meters with multispectral imagery of 30 meters as well as the policy of free data. In this paper, Landsat 8 multispectral and panchromatic imageries are being used, concerning surroundings of a lake in north-western Greece. Land cover information is extracted, using suitable digital image processing software. The rich spectral context of the multispectral image is combined with the high spatial resolution of the panchromatic image, applying image fusionpansharpening, facilitating in this way visual image interpretation to delineate land cover. Further processing concerns supervised image classification. The classification of pansharpened image preceded multispectral image classification. Corresponding comparative considerations are also presented.

Avaliação Da Suscetibilidade Do Solo À Erosão Nas Falésias Do Litoral Oriental Do Estado Do Rio Grande Do Norte

“…Na melhoria da interpretação visual das unidades homogêneas e padrões de geologia, geomorfologia, solos, vegetação e uso do solo foram empregadas as composições coloridas das bandas multiespectrais do LANDSAT 8-OLI no sistema de cor Red-Green-Blue (RGB) e no sistema híbrido de cores Red-Green-Blue--Intensity (RGBI), que permite a fusão entre as bandas multiespectrais e a banda pancromática, além de método índice e classifi cação supervisionada, como mostra a Tabela 3. O emprego de imagens híbridas RGBI garantem a escala 1:40.000 pois se benefi ciam da resolução espacial de 15m da banda pancromática, que destaca os atributos geométricos, melhor delineando as feições em superfície, enquanto as bandas multiespectrais realçam as informações espectrais diversas entre os alvos (TO-BLER, 1987;LAZARIDOU;KARAGIANNI, 2016).…”

MESSFN : a Multi-level and Enhanced Spectral-Spatial Fusion Network for Pan-sharpening

“…In recent years, significant breakthroughs have been made in remote sensing technology, which has improved the speed and quality of imaging in terms of spectral or spatial. However, it's still insufficient for MS images and PAN images to meet both high spectral resolution and high spatial resolution demands of practical applications, such as urban planning [1], land-cover classification [2], and environmental monitoring [3]. As shown in Fig.…”