I have a series of points in an ascii files that represent points along a line. I would like to import them as a line, or import and convert to a line.
I see that 6.5 has v.in.lines, but I am using 6.4. Is there any other way to do that conversion?
The data is 3D x,y,z points. I can just import them using v.in.ascii, but then they are points, with no lines. Is there another way to either import, directly, or convert?
Thanks,
--Adam
On 10/01/2010 01:35 AM, Adam Dershowitz, Ph.D., P.E. wrote:
I have a series of points in an ascii files that represent points along a line. I would like to import them as a line, or import and convert to a line.
I see that 6.5 has v.in.lines, but I am using 6.4. Is there any other way to do that conversion?The data is 3D x,y,z points. I can just import them using v.in.ascii, but then they are points, with no lines. Is there another way to either import, directly, or convert?
If it's only one line, then the simplest might be to re-write the ASCII file formated in the GRASS "standard" format, as a line. You'll need to add the header lines, something like:
VERTI:
L n 1
X_coord Y_coord
...
1 1
Where 'n' is the number of points.
Then run v.in.ascii ... format=standard and it should result in a line vector.
Thanks,
--Adam
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Micha Silver
Arava Development Co. +972-52-3665918
http://surfaces.co.il
On Oct 1, 2010, at 4:06 AM, Micha Silver wrote:
On 10/01/2010 01:35 AM, Adam Dershowitz, Ph.D., P.E. wrote:
I have a series of points in an ascii files that represent points along a line. I would like to import them as a line, or import and convert to a line.
I see that 6.5 has v.in.lines, but I am using 6.4. Is there any other way to do that conversion?The data is 3D x,y,z points. I can just import them using v.in.ascii, but then they are points, with no lines. Is there another way to either import, directly, or convert?
If it's only one line, then the simplest might be to re-write the ASCII file formated in the GRASS "standard" format, as a line. You'll need to add the header lines, something like:
VERTI:
L n 1
X_coord Y_coord
...
...
1 1Where 'n' is the number of points.
Then run v.in.ascii ... format=standard and it should result in a line vector.
Thanks. It is actually one line, at the moment, so I did that, and it worked fine. But I will have others. so was hoping for a generic solution. I wrote a shell script that transforms my particular data into "standard" and it seems to be working fine.
Again, thanks for the response.
--Adam
Adam wrote:
I see that 6.5 has v.in.lines, but I am using 6.4.
since it seems to be open season on backporting stuff, if there
is widespread demand, and no objections, I'd consider backporting
it for 6.4.1. but really it is just a wrapper script around
v.in.mapgen. the most valuable thing about it is the easy to
understand module name.
Hamish
On Oct 1, 2010, at 4:18 PM, Hamish wrote:
Adam wrote:
I see that 6.5 has v.in.lines, but I am using 6.4.
since it seems to be open season on backporting stuff, if there
is widespread demand, and no objections, I’d consider backporting
it for 6.4.1. but really it is just a wrapper script around
v.in.mapgen. the most valuable thing about it is the easy to
understand module name.
Thanks. Once I heard that it is just a script, I downloaded it myself. So, don’t backport it on my account. But, I do appreciate the thought.
–Adam