Hello everybody,
i'm using grass now for about 3 months now, and i still have some problems with management of vectors and tables.
now i'm trying to create transects with two meter segments. i established the transects along several hightlines with
v.in.ascii 3d lines and v.in.ascii 3d points, but now i don't succeed in establishing the two meter segments.
what is the easiest way (v.segment?, v.lrs.create?, other?)
and how do i use the command, concerning tables and input data?
thanks for your reply
thomas
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Thomas Drüssler wrote on 02/06/2007 09:07 AM:
Hello everybody,
i'm using grass now for about 3 months now, and i still have some problems with management of vectors and tables.
now i'm trying to create transects with two meter segments. i established the transects along several hightlines with v.in.ascii 3d lines and v.in.ascii 3d points, but now i don't succeed in establishing the two meter segments.
Do you have points and lines as two separate vector maps and want to
combine them? Then v.patch and v.clean will be needed.
what is the easiest way (v.segment?, v.lrs.create?, other?)
With an existing line (or several), I simply do:
v.split transects out=transects_split length=2
It inserts vertices every 2 map units (meters in my case).
Markus
and how do i use the command, concerning tables and input data?
thanks for your reply
thomas
Markus Neteler wrote:
Thomas Drüssler wrote on 02/06/2007 09:07 AM:
i'm using grass now for about 3 months now, and i still have some
problems with management of vectors and tables.
now i'm trying to create transects with two meter segments. i
established the transects along several hightlines with v.in.ascii 3d
lines and v.in.ascii 3d points, but now i don't succeed in
establishing the two meter segments.
Do you have points and lines as two separate vector maps and want to
combine them? Then v.patch and v.clean will be needed.
Markus,
Do you mean that this should break lines at points locations? I have
tried this once, and it didn't work: v.patch points and lines, v.clean
tool=break didn't break lines at points locations. Or have I
missunderstood your suggestion?
Maciek
On Wed, Feb 07, 2007 at 05:23:28PM +0100, Maciej Sieczka wrote:
Markus Neteler wrote:
> Thomas Drüssler wrote on 02/06/2007 09:07 AM:
>> i'm using grass now for about 3 months now, and i still have some
>> problems with management of vectors and tables.
>> now i'm trying to create transects with two meter segments. i
>> established the transects along several hightlines with v.in.ascii 3d
>> lines and v.in.ascii 3d points, but now i don't succeed in
>> establishing the two meter segments.
> Do you have points and lines as two separate vector maps and want to
> combine them? Then v.patch and v.clean will be needed.
Markus,
Do you mean that this should break lines at points locations? I have
tried this once, and it didn't work: v.patch points and lines, v.clean
tool=break didn't break lines at points locations. Or have I
missunderstood your suggestion?
Mhh, I was hoping for that. Bug or feature?
Markus