[GRASS-dev] [GRASS GIS] #2310: r.in.xyz: zcol should not be compulsory when method=n

#2310: r.in.xyz: zcol should not be compulsory when method=n
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Reporter: mlennert | Owner: grass-dev@…
     Type: defect | Status: new
Priority: normal | Milestone:
Component: Raster | Version: svn-trunk
Keywords: | Platform: Unspecified
      Cpu: Unspecified |
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In r.in.xyz, zcol is not necessary when method=n since all r.in.xyz does
is count the points. However, by default the module defines z=3, which
means that max_col becomes 3 and thus, for a simple file with only x and y
coordinates, max_col > ntokens (line 679 of main.c) and the modules fails
with

{{{
ERROR: Not enough data columns.
}}}

As it seems impossible to unset z, the only solution is to add a third,
bogus, column to the input data.

The code seems pretty much designed with the idea that a zcol is present
and it does not seem super-trivial enough for me do just change that.

I consider this a bug as it does seem counter-intuitive to require a zcol
when a method such as n is available.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2310&gt;
GRASS GIS <http://grass.osgeo.org>