[GRASS5] r.example on spearfish60 data

[marcos boullón magán]

2005/12/23, Glynn Clements <glynn at gclements.plus.com>:
>
> marcos boullón magán wrote:
>
> > Sorry. I'm not sure this is the best place to post this newbie
> > question, but maybe you can redirect me to the right list.
> >
> > Trying my Grass 6.0.1 under cygwin (compiled by myself) with the most
> > basic sample code, (r.example)[1] on the spearfish60 data [2], I
> > realized that the input and output raster maps don't match. The basic
> > code is a loop G_get_raster_row (...), then G_put_raster_row (...)
> > with no transformation, but the raster map "PERMANENT/cell/density",
> > size 16853, converts to "user1/cell/d",size 180759, using same region
> > parameters. Size x 10!!.
> >
> > user> grass spearfish60/user1
> > $ g.region ...
> > $ r.example input=density output=d
> > $ ls -l spearfish60/PERMANENT/cell/density spearfish60/user1/cell/d
> >
> > Is this size increment a normal behaviour? Didn't spearfish60 data
> > maps optimized for grass 6.0x data formats?
>
> What does:
>
>         diff -u PERMANENT/cellhd/density user1/cellhd/d
>
> say?
>
> --
> Glynn Clements <glynn at gclements.plus.com>
>

You were right! The "e-w resol", "n-s resol" were changed from 100 to
10 for this map, therefor the x10 increase in the data. I only checked
the WIND file in both mapsets, not the cellhd files. Never more.

(BTW: I assume the x10 size increase instead a predicted x100
--resolution changed in the both dimensions x10-- is because the map
is stored in compressed format; could anyone confirm?)

Thanks a lot.

M.


GRASS 6.0.1 (spearfish60):~/trabajo/grass/data/spearfish60 > ls PERMANENT/cell
/density user1/cell/density  -la
-rw-r--r--  1 marcos mkgroup-l-d  16853 Nov  5  2001 PERMANENT/cell/density
-rw-r--r--  1 marcos mkgroup-l-d 180759 Dec 19 18:31 user1/cell/density

GRASS 6.0.1 (spearfish60):~/trabajo/grass/data/spearfish60 > diff -u PERMANENT/
cellhd/density user1/cellhd/density
--- PERMANENT/cellhd/density    2001-11-05 12:13:24.000000000 +0100
+++ user1/cellhd/density        2005-12-19 18:31:38.000000000 +0100
@@ -1,12 +1,12 @@
 proj:       1
 zone:       13
 north:      4928000
-south:      4914000
+south:      4914020
 east:       609000
-west:       590000
-cols:       190
-rows:       140
-e-w resol:  100
-n-s resol:  100
+west:       590010
+cols:       1899
+rows:       1398
+e-w resol:  10
+n-s resol:  10
 format:     0
 compressed: 1

--
-- marcos boullón magán