mid: 1654
url: http://www.planet9.com/earth/sf/unionsquare/unionsquare.wrl
ref_url: http://www.planet9.com/sfcitymenu.htm
format: wrl 
pid: 20425
polygons: 9290
connected_components: 181
average_dihedral_angle: 1.10186
bounding_box: xmin = 0.025, ymin = 0.025, zmin = 0.025, xmax = 0.975, ymax = 0.210119, zmax = 0.973098
avg_depth: 1.904110
center: (0.506590,0.070071,0.486226)
scale: 0.539832
principle_axes: (0.764718,0.034838,0.643423), (0.640598,0.066719,-0.764973), (0.069578,-0.997163,-0.028704)
principle_values: (0.059211,0.024121,0.000841)