[GRASSLIST:5980] thanks for the help -- here's one more question

GRASS GRASS user
1

First, thank you to those who replied so quickly. I'm sorry for posting such basic questions, but I'd like to understand what I'm doing as I work. Here are the contents of the WIND file in spearfish/PERMANENT:

==========
proj: 1
zone: 13
north: 4928010
south: 4913700
east: 609000
west: 589980
cols: 634
rows: 477
e-w resol: 30
n-s resol: 30

Then, if I tell GRASS I do want to create location <spearfish>, I see this:

==========
To create a new LOCATION, you will need the following information:

1. The coordinate system for the database
         x,y (for imagery and other unreferenced data)
         Latitude-Longitude
         UTM
         Other Projection
2. The zone for the UTM database
    and all the necessary parameters for projections other than
    Latitude-Longitude, x,y, and UTM
3. The coordinates of the area to become the default region
    and the grid resolution of this region
4. A short, one-line description or title for the location

Do you have all this information for location <spearfish> ? (y/n)

I see the zone and the coordinates, but how do I determine what coordinate system to use? (x,y or Lat-Long or UTM or Other?)

Okay, thank you again for your help. I really do appreciate it.

Take care,
M

2

Then, if I tell GRASS I do want to create location <spearfish>, I see
this:

You don't need to make a new location, that already exists (it's spearfish)
(database is the full directory path to the directory spearfish is in)

You just want a new mapset.

try (in 'grass5 -text' mode):
LOCATION: spearfish
MAPSET: matt
DATABASE: /home/grass/

as /home/grass/spearfish/matt doesn't exist, it'll make it & off you go.
It is really simple once you figure out what it wants. :wink:

I see the zone and the coordinates, but how do I determine what
coordinate system to use? (x,y or Lat-Long or UTM or Other?)

UTM, zone 13, but you don't really have to know that to set up a new mapset.

Hamish

3

Matt Hoek said:

First, thank you to those who replied so quickly. I'm sorry for
posting such basic questions, but I'd like to understand what I'm doing
as I work.

You might want to look at the draft GRASS tutorial
(http://grass.itc.it/gdp/grass5tutor/), especially Part III: GRASS in 10
minutes - Quick Intro for Newbies. The section "You have a GRASS database"
is what you need to get going with the Spearfish dataset.

Moritz