Building Compliance to Road Setback in Urban Area of Ile-Ife, Osun State, Nigeria: from Remotely Sensed Data

The effectiveness of physical planning is a function of developers’ level of compliance to Physical development regulations provided by the planning authorities in charge of development control. This paper assessed the level of building compliance to road setback regulations and examined pattern of encroachment on major roads in Ile-Ife, Osun State, Nigeria using GIS and Remote Sensing. Ikonos 2019 of the study area was vectorised to identify contravention within setback zone on seven major roads in the study area. Questionnaire was also used to examine residents’ level of awareness of development control in the study area. The findings showed that six thousand two hundred and eighty-four (6284) buildings contravened the road setback regulation along the federal and state roads with most of them concentrated at the centre of the city. Majority (3975) of the contravened structures were permanent while 2309 of the buildings were temporary structures representing 63.3% and 36.7% respectively. It was also revealed that the contraventions were linearly patterned along the roads in the study area. Majority (63.5%) of the respondents were aware of development control regulation but the situation of compliance to road setback was low. It is therefore recommended government should provide adequate support for the local planning authorities in terms of adopting modern geospatial based techniques for physical development monitoring and control.