[GRASS-user] v.in.ascii - put1 of 4 columns to 3D point file attribute

[Nikos Alexandris]

On Wed, 2008-04-09 at 08:55 -0400, M S wrote:
> Greetings GRASSers:

Greetings Mark!

I am not proposing any solution - sorry.
> 
> First I'd like to say what a great book the Open Source GIS: A GRASS
> GIS Approach (3rd edition) is.  It is full of great practical and
> conceptual examples.  Well worth the money to anyone who has not
> purchased it yet!  Also a big thanks to the developers and users of
> GRASS who make it a powerful and amazing GIS.

Just wanted to say that it's nice to know that other people share the
same ideas about GRASS-GIS and GRASS-book.


> I have an ascii table of lidar data.  The columns are x,y,z, and a
> fourth column containing an integer code of some sort.  I have looked
> at the example in the man page about how to select columns for
> importing via some shell manipulation of the input ascii file, but I
> do not think it is applicable to what I'm doing (or perhaps the
> caffeine boost is not in effect yet).  I have also tried various
> combinations of parameters in v.in.ascii.
> 
> I would like to import the XYZ to build the geometry for 3D points,
> and have only "Cat" and "Code" in the attribute table.  ("Code" being
> a column name for the 4th column in the input ASCII). 

Watch out the CAPITAL letters. I think sometimes there are not liked
from SQL(ite).

>  I cant seem to find the combination of column definitions and other
> parameters to achieve this.  One option seems to import them all as "x
> double, y double, z double, code int", and then after the import, drop
> the x,y,z columns.  Is it possible to put the first 3 ASCII column
> values to the geometry, and use only the last column as an attribute?
> 
> I'm using GRASS 6.2.3 and sqlite database.
> 
> 
> Thanks out to anyone with some feedback.
> 
> Mark 

Cheers,

Nikos
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