accessory table for calquad coverage.
users can link to calquad useing CALQUAD-ID or QUADNAME (a fall back method).
table can also be loaded as a point theme useing the x and y fields

For more information plase refer to calquad.txt.

'---------------------------
CALQUAD-ID             4     5     B      -  User-assignable identifier
QUADNAME              27    27     C      -  USGS 7.5' quad name
x_coord   for a calculated centroid                               
y_coord   for a calculated centroid

extra fields...
OCODE                  8     8     C      -  Teale code for DRG quad image file
USGSCODE               7     7     C      -  USGS code for degree block of quad

The following fields are unique to this table...
R1                     1     1     C      -  Yes or No quad is in DFG Region 1
R2                     1     1     C      -  Yes or No quad is in DFG Region 2
R3                     1     1     C      -  Yes or No quad is in DFG Region 3
R4                     1     1     C      -  Yes or No quad is in DFG Region 4
R5                     1     1     C      -  Yes or No quad is in DFG Region 5
R6                     1     1     C      -  Yes or No quad is in DFG Region 6
R7                     1     1     C      -  Yes or No quad is in DFG Region 7
QUADCODE               7     7     C      -  DFG code equivalent to USGSCODE