[GRASS5] r.to.sites: change proposal for -a

[Markus Neteler]

On Tue, Oct 24, 2000 at 08:38:04AM -0500, Bill Brown - staff wrote:
> >
> >Hi all,
> >
> >a proposal for r.to.sites:
> >Currently when converting raster data to sites format you
> >get a list like this:
> >
> >3571556.25|5775981.25|#106 
> >3571731.25|5775981.25|#123.8 
> >3572243.75|5775981.25|#109.5 
> >3570556.25|5775968.75|#132.5 
> >
> >Here we have two problems:
> > - #cat may be INT only
> > - usually you want %doubles format in sites list
> >
> 
> I didn't read all the earlier messages, but last I knew,
> cat can be any RASTER_MAP_TYPE.  Did you change this?

Hi Bill,

I didn't change that, was just guessing (I should read the programmer's
manual). But I am expecting problems with s.surf.rst & friends if it is not
stored as %double. Or am I wrong?

The s.info only accepts INT cats:
s.info ktb12.5
[...]
Number of DIMENSIONS:         2
--------------------
                 - - MIN - -     - - MAX - -
        dim  1  3558006.250000  3574281.250000  Easting
        dim  2  5756006.250000  5775993.750000  Northing

Type of CATEGORY information: CELL_TYPE
----------------------------
                 - - MIN - -     - - MAX - -
                          80             370    No Label
[...]
although there are double cats. At least this is inconsistent
currently.

And if I want to reconvert the list back to raster with s.to.rast,
this module will make an INT raster map:
 s.to.rast in=ktb12.5 out=test
 Using size option: 0
 Finding and opening site list...

 ERROR: selected decimal field column no. 1 not present in sites list.

If interpolating, the s.surf.rst is also expecting doubles:
s.surf.rst help
[...]
     input   Name of the site file with input x|y|%z [%sm]

So it might be easier to modify the r.to.sites than all the other site
modules.

My 0.02 Euro...

Regards
 Markus

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