PDBGEO is a local program that computes various structural data from 
PDB-like formatted protein structures. The PDBGEO output contains 
one data block for each residue in the protein. Each data block 
includes three sections starting with a "#" character that contains 
information on the residue as a whole, on individual atoms of the 
residue, and on contacts with other residues, respectively. 
NB: areas are given on an arbitrary scale deduced from 66 dots 
evenly distributed on van der Waals spheres.

Description of the residue section (#a):
a: Residue type (one letter code)
i: Residue number
c: Residue chain
vdw: van der Waals area
acc: Area in contact with solvent
C:   Area in contact with carbon atoms of other residues 
N:   Area in contact with nitrogen atoms of other residues
+:   Area in contact with positively charged atoms of other residues
O:   Area in contact with oxygen atoms of other residues 
-:   Area in contact with negatively charged atoms of other residues
S:   Area in contact with sulfur atoms of other residues
s2:  Secondary structure (0= alpha-helix, 1=beta-sheet, 3=coil)
d3:  Calpha(i)-Calpha(i+3) distance (in Angstroems x 10)
d4:  Calpha(i)-Calpha(i+4) distance (in Angstroems x 10)
d5:  Calpha(i)-Calpha(i+5) distance (in Angstroems x 10)
d6:  Calpha(i)-Calpha(i+6) distance (in Angstroems x 10)
d7:  Calpha(i)-Calpha(i+7) distance (in Angstroems x 10)
phi: Phi backbone dihedral angle
psi: Psi backbone dihedral angle
chi1: Chi1 side-chain dihedral angle
chi2: Chi2 side-chain dihedral angle
bur: Area buried by other residues in the protein
pol: Percent of total area in contact with solvent or polar atoms
pac: Percent of total area in contact with solvent 
omeg: Omega backbone dihedral angle (CA-C-N-CA)

Description of the atom section (# atom) for atom X:
vdw, acc, C, N, +, O, -, S: see residue section
dcb: distance from the CB atom
acb: angle between the CA-CB and the CB-X vectors
bcb: dihedral angle X-CB-CA-Z where Z is the gamma atom used in Chi1 
determination

Description of the contact section (#aa):
i: Number (residue in contact)
c: Chain (residue in contact)
ct: Contact area (residue in contact)
dcb, acb, bcb: same as in the atom section with X being the CB atom 
of the residue in contact
dca  aca  bca: same as above but X is the CA atom of the residue in 
contact 
dcm  acm  bcm: same as above but X is the side-chain centroid of the 
residue in contact 
This is followed by all individual atoms of the residue in contact 
that do contact the reference residue(one atom per line). Each line 
includes the ct, dcb, acb and bcb atomic data followed by 
expressions NAME.X.Y where
NAME is the name of the atom of the reference residue in contact,
X is the distance betwenen atoms in contact (x10)
Y is the area of the reference atom in contact