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

[Bernd Vogelgesang]

Hi Alexandre,

did you find time have a look at this stuff?

I would be very interested in an "easy" solution with SQL and virtual
layers :)

Cheers,

Bernd

Am 05.05.19 um 10:25 schrieb 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
> <mailto:petro at roxo.org>> escreveu:
>
>     On Thu, 2 May 2019 06:52:43 +0000, Karl Magnus Jönsson
>     <Karl-Magnus.Jonsson at kristianstad.se
>     <mailto: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
>     <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 <mailto: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 <mailto: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 <mailto: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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