question: private static QuadTree < Coord > buildQuadTree ( ) { QuadTree < Coord > qt = new QuadTree < Coord > ( 130000.0 , - 3707000.0 , 152000.0 , - 3684000.0 ) ; final double y9 = - 3685018.8482 ; qt . put ( 130048.2549 , - 3685018.8482 , new Coord ( 130048.2549 , y9 ) ) ; final double y8 = - 3702339.3562 ; qt . put ( 148048.2549 , - 3702339.3562 , new Coord ( 148048.2549 , y8 ) ) ; final double y7 = - 3704504.4197 ; qt . put ( 148798.2549 , - 3704504.4197 , new Coord ( 148798.2549 , y7 ) ) ; final double y6 = - 3706669.4833 ; qt . put ( 149548.2549 , - 3706669.4833 , new Coord ( 149548.2549 , y6 ) ) ; final double y5 = - 3706669.4833 ; qt . put ( 151048.2549 , - 3706669.4833 , new Coord ( 151048.2549 , y5 ) ) ; final double y4 = - 3701473.3308 ; qt . put ( 148048.2549 , - 3701473.3308 , new Coord ( 148048.2549 , y4 ) ) ; final double y3 = - 3697143.2038 ; qt . put ( 146548.2549 , - 3697143.2038 , new Coord ( 146548.2549 , y3 ) ) ; final double y2 = - 3704937.4325 ; qt . put ( 146548.2549 , - 3704937.4325 , new Coord ( 146548.2549 , y2 ) ) ; final double y1 = - 3705803.4579 ; qt . put ( 148048.2549 , - 3705803.4579 , new Coord ( 148048.2549 , y1 ) ) ; final double y = - 3684152.8228 ; qt . put ( 130048.2549 , - 3684152.8228 , new Coord ( 130048.2549 , y ) ) ; return qt ; }
target:  Building a basic QuadTree containing just the centroid coordinates of the ten validation areas. This is done for the Nelson Mandela Bay Metropole.