Comparative analysis between techniques of Remote Sensing in measurement of vegetation urban in municipality of Alegre, ES

• Autor(a) principal: Magalhães, Ivo Augusto Lopes
• Data de Publicação: 2017
• Outros Autores: Carvalho Junior , Osmar Abílio de, Santos, Alexandre Rosa dos
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Cerrados (Montes Claros. Online)
• Texto Completo: https://www.periodicos.unimontes.br/index.php/cerrados/article/view/1347
• topic: Geoprocessamento; fotointerpretação; mapeamento urbano.; Geoprocessing; photointerpretation; urban mapping.; Geoprocesamiento; fotointerpretación; la cartografía urbana.

The objective of the study was to compare the results obtained by means of orbital remote sensing techniques, in order to measure the arboreal vegetation in municipality of Alegre, ES. A high spatial resolution image of the GeoEye-1 satellite was used and the vegetation photointerpretation was determined as a model technique to be compared to NDVI, SAVI vegetation indexes and Euclidian Distance and Isoseg image classifiers. The Vegetation Indexes and the classifiers were sliced ​​into three classes; Urban vegetation, pasture and urban areas. Through the photointerpretation the urban vegetation was measured in 68 ha. However, the SAVI vegetation index with adjustment factor L 0.25 obtained 66.46 ha, corresponding to 11.73% of the urban perimeter, however, the NDVI index underestimated the urban vegetation by 19.13 ha when compared to the area Mapped with SAVI 0.25. For the study area, the SAVI index with soil adjustment factor 0.25 and the Isoseg classifier can be used to replace the photointerpretation, since they presented areas of urban vegetation measured with approximate values, besides being less expensive to obtain the mapping of the vegetation.