[GRASS-user] Re: v.in.ascii

Thu Oct 21 08:22:19 EDT 2010

First, check your separator and explicitly state it by the fs parameter
e.g. fs=' ' or fs='\t', etc.

If you are using headers make use of skip
e.g.  skip=1 the first line is the header

you could explicitly state what are the columns with x and y
# x=2 explicitly states that x is the second column
# y=3 explicitly states that y is the third column

here is an example:
v.in.ascii input=/your_path/your_file.asc output=name fs=' '
columns='point_id varchar(20), x double precision, y double precision' x=2
y=3 skip=1 --o

here is the input file (example in utm_wgs84 zone 32N)
point_id x y
point1 575225.75 4785221.74
point2 575229.78 4785227.41

etc.

Hope this helps!
Duccio

> -------- Messaggio originale --------
> Oggetto:        [GRASS-user] v.in.ascii
> Data:   Thu, 21 Oct 2010 12:15:56 +0200
> Mittente:       Luca Cinquepalmi <cinquepalmi at planetek.it>
> Organizzazione:         Planetek Italia s.t.l. +39 080 9644200
> A:      grass-user at lists.osgeo.org
>
>
>
> Hi. I started with grass and whne i use the v.in.ascci comand the wollowing
> message appears.
>
> ERROR: y column number>  minimum last column number
> (incorrect field separator?)
>
> what does it mean? is there another method to import ascci file? thanks
>
> Luca
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> Message: 5
> Date: Thu, 21 Oct 2010 11:32:08 +0100
> From: Monica Buescu <monicabuescu1985 at gmail.com>
> Subject: Re: [GRASS-user] Use of r.mode
> Cc: GRASS user list <grass-user at lists.osgeo.org>
> Message-ID:
>        <AANLkTintNHzbKeJPpsihEE8YNDS-E-jFdZ0nSDPswTD2 at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> >
> >
> > Well, that's not good. Yes, maybe a problem with disk space or memory?
> l'll
> have to leave to someone more knowledgeable to answer here.
>
>
>
>
> Thanks Micha
> Probaby in this case is "Memory" space. Because for Smaller images I don't
> get any problem and bigger images I'm getting this problem.
> As anyone experienced such a problem? (GRASS takes toooooo long to display
> an image or apply r.mapcalc?
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> Message: 6
> Date: Thu, 21 Oct 2010 11:43:51 +0100
> From: Kim Besson <kimbesson1981 at gmail.com>
> Subject: Re: [GRASS-user] Type of data to be used in i.maxlik
> To: GRASS user list <grass-user at lists.osgeo.org>
> Message-ID:
>        <AANLkTinXf2V9m6340=YE1j=qWrf35PDEhc-9MigCBsPC at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Markus
>
> >
> >
> >
> >> The input can be double but will be read as integer (CELL) since the
> >> function
> >> G_open_cell_old() is used [1].
> >>
> >>
> > **
> >
>
> *This means what? That pixels with values >255 are all the same? or pixels
> like 1,034 and 2,043 are rounded?*
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> Message: 7
> Date: Thu, 21 Oct 2010 13:09:09 +0200
> From: Markus Metz <markus.metz.giswork at googlemail.com>
> Subject: Re: [GRASS-user] Type of data to be used in i.maxlik
> To: Kim Besson <kimbesson1981 at gmail.com>
> Cc: GRASS user list <grass-user at lists.osgeo.org>
> Message-ID:
>        <AANLkTimEJ7_NwuE=n50Jabs3Gw+p-MDOA7MCH_imn6Xw at mail.gmail.com<n50Jabs3Gw%2Bp-MDOA7MCH_imn6Xw at mail.gmail.com>
> >
> Content-Type: text/plain; charset=ISO-8859-1
>
> Kim Besson wrote:
> >>
> >>>
> >>> The input can be double but will be read as integer (CELL) since the
> >>> function
> >>> G_open_cell_old() is used [1].
> >>>
> >>
> >
> > This means what? That pixels with values >255 are all the same?
>
> I think the representable range of CELL is -2,147,483,647 to
> 2,147,483,647. Anything beyond the range of CELL will be transformed
> (by the system, not by GRASS) to fall within the range.
>
> > or pixels like 1,034 and 2,043 are rounded?
>
> Truncated, not rounded, e.g.
> 1.034 -> 1
> 1.9 -> 1
> 2.1 -> 2
> -1.9 -> -1
>
> Markus M
>
>
> ------------------------------
>
> Message: 8
> Date: Thu, 21 Oct 2010 13:57:45 +0200
> From: Micha Silver <micha at arava.co.il>
> Subject: Re: Fwd: [GRASS-user] v.in.ascii
> To: Luca Cinquepalmi <cinquepalmi at planetek.it>
> Cc: grass-user at lists.osgeo.org
> Message-ID: <4CC02AB9.4000302 at arava.co.il>
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> End of grass-user Digest, Vol 54, Issue 46
> ******************************************
>

-- 
Dr. Duccio Rocchini, PhD

Edmund Mach Foundation
IASMA Research and Innovation Centre
Environment and Natural Resources Area
GIS and Remote Sensing Unit
Via Mach 1, 38010 San Michele all'Adige (TN) - Italy
Phone +39 0461 615 570
duccio.rocchini at iasma.it
skype: duccio.rocchini
web page: http://gis.fem-environment.eu/rocchini/
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