How to import DLG data in optional format

GRASS GRASS user
1

At 05:30 AM 1/9/96 -0600, you wrote:

Hello,
      I am trying to import some DLG data (in optional format) that
I downloaded from cr.usgs.gov. After uncompressing the downloaded files,
I have something like the following:

      AU.BDF01.opt, AU.BDF02.opt, AU.BDF03.opt, AU.BDF04.opt
      AU.BDF05.opt, AU.BDF06.opt, AU.BDF07.opt, AU.BDF08.opt

I have been instructed to use v.in.dlg or v.in.dlg2 to get started
with the process of importing the data into GRASS; however, this
program requires the use of *one* ".opt" file. Currently, I have 8
".opt" files. How can one combine all of the files listed above
into one ".opt" file that I can use with the v.in.dlg or v.in.dlg2
commands of GRASS? I have read the manuals but can not seem to locate
this information. I would be *truly grateful* for any type of help
hints or advice :slight_smile:

Thank you in advance

Casey

Each file will have to be treated individually at first but can be combined
later in v.patch.
First run
dd if=inputfilename of=outputfilename ibs=8000 cbs=80 conv=unblock
This will add record delimiters prior to importing into GRASS.

Then run v.in.dlg, or v.import (DLG option).

These files comprise a 1:100,000-scale quad divided into 8 7.5'-scale quads.

Run v.patch to create a single map layer.

Good Luck

Gregg Hadish
Golden Hills Resource Conservation and Development
Oakland, Iowa