Grass ASCII Vector File Format????

[Susan Huse]

> Our printer choked when I tried to print the 560+ pages of the Grass
> manual so I'm without for the moment.
>

Try g.manual.  

> Can anyone out there give me the Grass ASCII vector file format... I
> want to get busy and write a translation program from IRDRISI and ATLAS
> ASCII vector formats.
> 
> Thanks in advance.
> 
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> William W. (Boo) Bushing  |  "Life is too important to be
> 6500boo at ucsbuxa.bitnet    |       taken seriously"
> 6500boo at ucsbuxa.ucsb.edu  | 
> bushing at lifesci.ucsb.edu  |            - Einstein
> Marine Biotechnology Lab   Univ. of Calif. Santa Barbara
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The ascii format actually isn't in the manual, though I have been told
that a file explaining it lives somewhere on moon.

The ascii attributes live in dig_att/ - exactly the same file as the
normal GRASS vector dig_att.  Same is true of the dig_cats file.

The actual line work and header information is in the dig_ascii/ file.

I have included bits of a file below, just to give you a sense.
Basically
Lines 1-14 are reserved header information.
Each line, site, area edge is stored as a series of points, the 
first node, all middle points, the last node.  Sites require two 
points specified (first node and last node) which are the exact 
same.

Format

A #
 n e
 n e
 n e

A means that it is an area edge, L is a line, P is a point (site)
# is the number of points comprising that line.  A site would be P 2.
For areas and lines could be any length, depending on the data.
Then follows # number of lines of northings and eastings which are
the actual points.

Deleted lines are specified by a lower case (a, l, p)


EXAMPLE:

ORGANIZATION: UCB Spatial Info Systems Lab
DIGIT DATE:   March 1990
DIGIT NAME:   deck
MAP NAME:     Output from v.patch
MAP DATE:
MAP SCALE:    100000
OTHER INFO:   Delta Service Boundary
ZONE:         10 
WEST EDGE:    597800
EAST EDGE:    638800
SOUTH EDGE:   4182000
NORTH EDGE:   4268000
MAP THRESH:   76.2
VERTI:
A  13
 4206808.83   639931.9
 4207376.05   640283.91
 4207435.66   640351.46
 4207608.23   640777.77
 4208326.68   641913.48
 4208440.61   641891.17
 4208503.47   641854.5
 4208696.05   641680.93
 4208946.77   641635.91
 4209203.36   641636.51
 4209265.65   641566.83
 4210082.76   640061.35
 4210136.05   640057.88
A  8
 4183290.01   631580.7
 4183331.24   631620.73
 4183418.23   631489.9
 4183442.21   631220.28
 4183352.5    630992.97
 4183465.71   630917.64
 4183581.49   630844.81
 4183737.05   630712.97
A  3
 4237999.48994801 604624.35109977
 4237999.49468203 604624.35100115
 4237957.06041752 605521.81067
A  2
 4237957.06041752 605521.81067
 4237957.06041752 605521.81067
A  2
 4237999.48994801 604624.35109977
 4237957.06041752 605521.81067
P  2
 4237957.06041752 605521.81067
 4237957.06041752 605521.81067
a  3
 4237999.48994801 604624.35109977
 4237999.49468203 604624.35100115
 4237957.06041752 605521.81067




Hope that helps, 

Sue Huse
CEDR - REGIS
University of California, Berkeley