economic development potential of upgrading wonderboom airport to international status 75 chapter 5 s economics analysis this provides a detailed the types business activity associated land requirements and additional income generation that will occur at within 5km radius ie impacts for local economy importantly these form part total impact be presented in 6 therefore details have been incorporated im pact calculations tshwane gauteng like estimated regional provided according two market demand scenarios based on their extensive experience expertise research group edrg was subcontracted by urban econ conduct data represents summary findings as contained complete report expanding 2003 submitted proceed