mid: 644
url: http://www.3dcafe.com/models/piano.zip
ref_url: http://www.electricfunstuff.com/jgdc/resources/terrain1.zip
format: xthreexds 
pid: 28457
polygons: 39589
connected_components: 178
average_dihedral_angle: 0.345708
bounding_box: xmin = 0.025, ymin = 0.025, zmin = 0.025, xmax = 0.575796, ymax = 0.657836, zmax = 0.975
avg_depth: 1.621779
center: (0.268282,0.356887,0.523949)
scale: 0.599987
principle_axes: (0.226100,-0.255759,0.939929), (-0.964726,-0.192367,0.179721), (-0.134846,0.947408,0.290231)
principle_values: (0.067592,0.021760,0.010576)