Remote Sensing of City Extension and Vegetal Cover Changes along Lagos-Ibadan Access Strip in Nigeria

Abstract

The paper employed Remote sensing data in a multi-decadal assessment of vegetal to urban land cover transition along Lagos-Ibadan expressway. The forty-year assessment commenced in 1980 and ended in 2020. Landsat imageries acquired for the respective periods were subjected to supervised classification. Results reveal massive conversion of vegetated areas into built-up areas. The transition became pronounced from the second decade with 30,226 and cumulative of 48,455 Hectares of vegetation transforming into built-up area. During the third decade (2000 to 2010), additional 44,780 and cumulative of 93,235 Hectares of green area was converted into built-up areas. The largest transition was recorded in the last decade (2010 to 2020) during which vegetated area covering 50,827 Hectares was converted to living or industrial areas giving a cumulative transition of 141,065 in year 2020 Pearson moment correlation showed a high negative correlation with a coefficient value of -0.86. Hectares of vegetal areas into built-up or bare surfaces.