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

[Alexandre Neto]

That is actually quite easy using a bit of SQL in a virtual layer. After
all the west to east and north to south is just a matter of adding a X and
a Y fields and order first by X, then by Y.

I am not at my computer now, but when I came back I will try to get you a
ready to use query.

Alex

A qui, 2/05/2019, 17:39, Fernando M. Roxo da Motta <petro at roxo.org>
escreveu:

> 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
>
> --
> ---------------- Non luctari, ludare -------------------+ WYSIWYG
> Fernando M. Roxo da Motta <petro at roxo.org>              | Editor?
> Except where explicitly stated I speak on my own behalf.|  VI !!
>                 PU5RXO                                  | I see text,
> ------------ Quis custodiet ipsos custodes?-------------+ I get text!
>
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