ARC to GRASS

[Pacheco, Percy]

11/7/95

Hi Jocelyn:

Enclosed is a step by step procedure using an
example to convert ArcInfo .E00 format files to
GRASS vector files.  I hope it is useful to you.


Procedure to convert ArcInfo (.E00) format files
to GRASS Vector files
--------------------------------------------------
--------------------------------------------------
----
Prepared by: Percy A. Pacheco
    

Example: "sub_east.e00" ArcInfo file in
subdirectory /grass/data/sead/gom/ma

1) cd /grass/data/sead/gom/ma

2) grass4.1

3) arc

4) import cover sub_east.e00 sub_east_arc

5) build sub_east_arc

6) ungenerate poly sub_east_arc sub_east_poly

7) ungenerate line sub_east_arc sub_east_line

8) ungenerate point sub_east_arc sub_east_point

9) tables
    select sub_east_arc.pat
    items
    unload sub_east_unload sub_east_arc-id sub-id
sub-name area             perimeter sub_east_arc#
orw mdc wsp area-sq-mi my-bas                
position
    stop

10) quit

11) cd /grass/data/sead/gom/workspace

12) mkdir arc

13) cd arc

14) cd /grass/data/sead/gom/ma

15)    cp sub_east_poly
/grass/data/sead/gom/workspace/arc
    cp sub_east_line
/grass/data/sead/gom/workspace/arc
     cp sub_east_point
/grass/data/sead/gom/workspace/arc
    cp sub_east_unload
/grass/data/sead/gom/workspace/arc

16) cd /grass/data/sead/gom/workspce/arc


17) vi sub_east_unload
    :1,$s/,/   /g
    :wq

18) v.in.arc
    sub_east.vec
    coverage type
        polygon
    neatline
      no
    lines filename
        sub_east_line
    label_points filename
        sub_east_point
    label_text filename
        sub_east_unload
    number of column to be used
        2
    number of column for category value
        10
    number of column for attribute text
       <CR> for none

19) v.support
    sub_east.vec
    1
    snap nodes to other nodes within a threshold?
n
    <CR> to quit

20) v.digit
    3
    sub_east.vec
      your organization: SEAD
      map's date: Aug 24 95
      map's scale: 1:24K
      <escape>
    shall we continue? y
    Q

21) g.rename vect=sub_east_vec, ma_sub_east.vec

Percy A. Pacheco
Environmental Engineer
Strategic Environmental Assessments Division
ORCA/NOS/NOAA
1305 East West Highway, SSMC4, 9th Floor
Silver Spring, MD 20910
U.S.A.

Tel: (301)713-3000 x 155
Fax: (301)713-4384
ppacheco at seamail.nos.noaa.gov