I want to take an ascii file of x,y coordinates
(in UTMs) which define the boundary of an area and create
a GRASS4.1 map. The original ascii file has no headers --
just the x,y coordinates (x and y separated by spaces, 1 coordinate
pair per line).
What I've tried so far is the following:
1) Edit the original ascii file to look like
an ascii arc file according to the example
in the Programmer's Manual. That is, I
added header information, put in arc type
and no. of coordinate pairs, and switched
the values to y,x format. I stored this
modified file under the dig_ascii subdirectory
of my mapset.
2) Next, I ran v.import using option 3 to
convert an ascii vector file to GRASS vector
format. This seems to run OK, but when I
try to display the map, I get nothing.
Am I missing some important steps? Is there an easier
way to convert a straight ascii file to something GRASS can use?
Thanks for any advice.
Sharyl Walker
Dept. of Agricultural Engineering
University of Illinois
guernsey@holstein.age.uiuc.edu