[GRASS-user] Creating Vector Line File from Point File

[Helmut Kudrnovsky]

[please keep it on the ML]

what about (from 
http://grass.osgeo.org/grass64/manuals/html64_user/v.in.ascii.html):

Example 1b) - standard format mode
Sample ASCII 3D line vector map for 'standard' format mode with 
simplified input (note the space field separator). Note the -z flag 
indicating 3D vector input, and the -n flag indicating no vector header 
should be expected from the input file. The example can be tested in the 
Spearfish sample dataset:

echo "L 5 1
591336 4927369 1224
594317 4925341 1292
599356 4925162 1469
602396 4926653 1235
607524 4925431 1216
1 321 " | v.in.ascii -zn out=line3d format=standard

or an example from 
http://grass.osgeo.org/grass64/manuals/html64_user/v.in.lines.html:

v.in.lines in=- out=two_lines fs=, <<EOF
167.846717,-46.516653
167.846663,-46.516645
167.846656,-46.516644
167.846649,-46.516644
167.846642,-46.516643
NaN,NaN
167.846520,-46.516457
167.846528,-46.516461
167.846537,-46.516464
167.846535,-46.516486
167.846544,-46.516489
167.846552,-46.516493
EOF

best regards
Helmut


Am 14.02.2011 00:08, schrieb Andrew Lewin:
> Hi Helmut,
>
> Thanks for the suggestions; however, I am having some trouble importing the data.  How do I create a line data vector layer from the data?
>
> Andrew
>
> Andrew Lewin
> andrew.lewin at sympatico.ca
>
> Founder, Speak Up for the Blue
> www.speakupforblue.com
>
> President,  Spatial-Conserve Incorporated
> www.spatialconserve.com
>
> Associate
> C-FOAM (Canadian Fisheries, Oceans and Aquaculture Management Group)
> Telfer School of Management, University of Ottawa
>
>
>
>
>
>
>
>
> On 2011-02-13, at 5:25 PM, Helmut Kudrnovsky wrote:
>
>> Am 13.02.2011 23:20, schrieb Helmut Kudrnovsky:
>>> Hi,
>>>
>>> Andrew Lewin:
>>>> I would like to create a vector line file from a point file for vessel
>>>> transportation spatial data (LRIT). Each vessel has an ID so I would
>>>> like to have one line per ID. I can't find any method of doing this
>>>> in the help files. I am a beginner at Grass.
>>>
>>> what about
>>>
>>> v.in.lines - Import ASCII x,y[,z] coordinates as a series of lines.
>>> http://grass.osgeo.org/grass64/manuals/html64_user/v.in.lines.html
>>>
>>
>> or http://grass.osgeo.org/grass64/manuals/html64_user/v.in.ascii.html
>>
>> best regards
>> Helmut
>>
>>
>
>