[Qgis-user] How calculate sequential values based on spatial pattern

[Fernando M. Roxo da Motta]

On Thu, 2 May 2019 06:52:43 +0000, Karl Magnus Jönsson
<Karl-Magnus.Jonsson at kristianstad.se> wrote:


> Hi!
> One way could be to calculate the sequence and coordinates in Excel
> or something similar. If the points are regularly spaced of course.
> Then save to csv, import in QGIS and save to whatever.

  That can be a great idea.

  In my problem all a have to start is a polygon, not necessarily
regular, and the directions and spacing of the lines.  The lines in the
grid doesn't have to be orthogonal and almost never NS/EW.

  That seems to be a little cumbersome for an excel spreadsheet.  🤔🤔



> 
> Cheers!
> 
> Karl-Magnus Jönsson 
> 
> 
> -----Ursprungligt meddelande-----
> Från: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] För
> Fernando M. Roxo da Motta Skickat: den 2 maj 2019 02:16
> Till: qgis-user at lists.osgeo.org
> Ämne: Re: [Qgis-user] How calculate sequential values based on
> spatial pattern
> 
> On Wed, 1 May 2019 16:38:41 -0500, Apoyo Carbono
> <ana.munevar at fcgsas.com> wrote:
> 
> 
> > Hi!
> > I need your help. I need to Create a numbers sequentially in a
> > "Points shapefile"  with a spacial pattern.
> > For example, the point number 1 start northwestern and the next
> > numbers points will be order from west to east. For the next row (to
> > South) going from west to east too.
> > And so on, the values points increase to the south. Therefore the
> > last point will be in the southeast.
> > For now I'm doing manual but it is around 1,000 points!  
> 
>   This looks like a lot to a 3D seismic survey.  🤔🤔🤔
> 
>   I had a script for Qgis 2.x that worked well enough to be useful to
> me.  The points were generated using a grid support.  In your case I
> would have a set of EW lines spaced regularly from north to south, and
> numbered that way.
> 
>   During the points generation I had two (among others) attributes
> associated to each point.   The first one was a point number within
> the line and the other the line number.
> 
>   The points were generated so that all points with the same point
> number were parallel to another set of line (usually perpendicular to
> the first one).
> 
>   I don't know if this is like you are looking for, the point here
> (pun unintended) were to associate the numbering attribut while
> generating the points.
> 
>   Hope this helps.
> 
> 
> > 
> > I hope that you understand my situation. Can you help me? I could
> > send you the shapefile with an example better explained
> >   
> 
> 
>   Roxo
> 
> P.S.- It is possible to still have tose set of scripts luking around
> somewhere, they were never ported to 3.X.  They were too horrible to
> begin with.  😇😇








  Roxo

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