Images aerophotogrametric and orbital in determining the use and occupancy of land and Permanent Preservation Areas (PPAs) / Imagens aerofotogramétricas e orbitais na determinação do uso ecupação da terra e de áreas de preservação permanente

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

17/09/2010

RESUMO

With this study we evaluated the result of different methodologies in determining the use and occupancy of land and permanent preservation areas using digital aerial photographs with spatial resolution of 1m (scenario 01) and satellite imagery with a spatial resolution of 0.5 m ( scenario 02), photointerpreted screen, on a scale of 1:2000 mapping, watershed stream Horizonte, Alegre-ES. We avalueted the permanent preservation araes along watercourses, around springs, land with slopes greater than 45 degrees and upper third of the top of hills for scenarios 01 and 02. Areas that should be destined to permanent preservation areas in the scene 01 and 02 totaling 5.97 km and 5.87 km , respectively, differing only in APPs around springs (0.13 km 0.10 km ) and over the APPs watercourses (1.87 km 1.79 km ), with no difference for APPs slope less than 45 degrees (0.04 km ) APP and the upper third of the hilltop (3.94 km ). We used the global performance indices and Kappa index for determining the average error between scenarios 01 and 02. Of the 27 classes of land use identified, grassland and forest fragmentation occupy 45.54% and 24.26% in stage 01, and 33.50% and 19.54% in stage 02, respectively. Of the total of permanent preservation areas in certain stage 01, only 33.92% of APPs occupy that role, while in scenario 02, that percentage is 35.92%. The difference in photo-interpretation of the scenarios under study is due to the bands red, green and blue (scenario 01) and red, green, blue and near infrared (scenario 02). There is a positive change in the overall performance of the scenario 01 6.67% compared to 2002 scenario, and positive change in the kappa index 2.09%, the scenario in 2002 compared to 2001 scenario, showing no significance by statistical analysis at 5% level by t test.

ASSUNTO(S)

geographic information systems recursos florestais e engenharia florestal environmental conservation sustentabilidade sistemas de informações geográficas fotointerpretação preservação ambiental sustainability sensoriamento remoto remote sensing remote sensing

ACESSO AO ARTIGO

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