[Qgis-user] QGIS3 Layout - North Arrow?

[knussear]

I noticed in the project view I can add a scale bar, and north arrow as
"decorations" - but no legend is available. In the layout I can add legends
and scale bars, but no north arrow is available. Pretty sure I'm missing
something somewhere???



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Re: [Qgis-user] QGIS3 Mac Numpy?

[knussear]

The "Contour Plugin" had matplotlib and numpy dependencies.


William Kyngesburye wrote
> What plugin wanted matplotlib?
> 
> I noticed that matplotlib is not used in the core plugins/qgis now, so I
> do not install it with QGIS.





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Re: [QGIS-it-user] Comandi GDAL in QGIS 3.0

[cesaregal]

Ho dato uno sguardo al bug tracker riscontrando che anche altri hanno trovato
difficoltà nell'utilizzo dei comandi GDAL in QGIS 3.
Vedi ad esempio il Bug report #18413 
https://issues.qgis.org/issues/18413



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Re: [Qgis-user] A description of attributes in the "Derivate group"

[Andrea Peri]

Hi Harrissou,

Yes it is what I'm searching for.
:)

Thx,
A.




2018-03-16 15:27 GMT+01:00 DelazJ :

> Hi Andrea,
>
> There's https://docs.qgis.org/2.18/en/docs/user_manual/introduction/
> general_tools.html#feature-informations but I don't know if it's what you
> are looking for.
>
> Regards,
> Harrissou
>
> 2018-03-16 15:14 GMT+01:00 Andrea Peri :
>
>> Hi,
>> when do an identify, in the result windows , appear also a group named
>> "Derived".
>> In it there is some information . I understand they are calculate
>> directly from QGIS.
>>
>> There is somewhere a description of what mean each of them ?
>>
>> Thx,
>>
>>
>> --
>> -
>> Andrea Peri
>> . . . . . . . . .
>> qwerty àèìòù
>> -
>>
>> ___
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>


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Re: [Qgis-user] A description of attributes in the "Derivate group"

[DelazJ]

Hi Andrea,

There's
https://docs.qgis.org/2.18/en/docs/user_manual/introduction/general_tools.html#feature-informations
but I don't know if it's what you are looking for.

Regards,
Harrissou

2018-03-16 15:14 GMT+01:00 Andrea Peri :

> Hi,
> when do an identify, in the result windows , appear also a group named
> "Derived".
> In it there is some information . I understand they are calculate directly
> from QGIS.
>
> There is somewhere a description of what mean each of them ?
>
> Thx,
>
>
> --
> -
> Andrea Peri
> . . . . . . . . .
> qwerty àèìòù
> -
>
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Re: [QGIS-it-user] Help on line di Qt Designet

[Genna Comite]

Avete notato che l'help in linea del Qt Designer di QGIS è privo di
contenuti? Questo sia per la versione 2.18 che 3.0 di QGIS. Qualcuno può
indicarmi un manuale dettagliato per studiare lo strumento in profondità?

Il gio 15 mar 2018, 20:03  ha scritto:

> Invia le richieste di iscrizione alla lista QGIS-it-user all'indirizzo
> qgis-it-user@lists.osgeo.org
>
> Per iscriverti o cancellarti attraverso il web, visita
> https://lists.osgeo.org/mailman/listinfo/qgis-it-user
> oppure, via email, manda un messaggio con oggetto `help' all'indirizzo
> qgis-it-user-requ...@lists.osgeo.org
>
> Puoi contattare la persona che gestisce la lista all'indirizzo
> qgis-it-user-ow...@lists.osgeo.org
>
> Se rispondi a questo messaggio, per favore edita la linea dell'oggetto
> in modo che sia più utile di un semplice "Re: Contenuti del digest
> della lista QGIS-it-user..."
>
>
> Argomenti del Giorno:
>
>1. QGIS3 - errore plugin Profile Tool (Gabriela Osaci Costache)
>2. Comandi GDAL in QGIS 3.0 (cesare...@libero.it)
>3. Re: Comandi GDAL in QGIS 3.0 (Tony75)
>4. QGIS e il 3D (matteo)
>5. Re: Qgis3 - Problemi persistono - OSX (Tony75)
>6. Re: Comandi GDAL in QGIS 3.0 (cesaregal)
>7. Re: Comandi GDAL in QGIS 3.0 (cesaregal)
>
>
> --
>
> Message: 1
> Date: Thu, 15 Mar 2018 09:13:36 + (UTC)
> From: Gabriela Osaci Costache 
> To: Utenti QGIS It 
> Subject: [QGIS-it-user] QGIS3 - errore plugin Profile Tool
> Message-ID: <874793658.1388547.1521105216...@mail.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
>  Ciao a tutti e tutte!
> Su due portatili (Windows 10-64bit, QGIS 3 installato tramite osgeo4w 32
> bit) ho lo stesso problema con il plugin Profile Tool usando un DEM tipo
> .tif : non è possibile disegnare la linea del profilo. Da qui l'errore
> python che incollo:2018-03-14T20:35:28 WARNING Traceback (most recent call
> last): File
> "C:/Users/Catalina/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\profiletool\tools\ptmaptool.py",
> line 78, in moved
> self.profiletool.rubberband.addPoint(QgsPoint(self.pointstoDraw[i][0],self.pointstoDraw[i][1]))
> TypeError: QgsRubberBand.addPoint(): argument 1 has unexpected type
> 'QgsPoint'
>
> Profile Tool funziona alla grande con QGIS 2.18.16 e 2.18.17 con lo stesso
> DEM.
> Grazie,Gabriela
> -- parte successiva --
> Un allegato HTML è stato rimosso...
> URL: <
> http://lists.osgeo.org/pipermail/qgis-it-user/attachments/20180315/68f2d0d1/attachment-0001.html
> >
>
> --
>
> Message: 2
> Date: Thu, 15 Mar 2018 11:06:00 +0100 (CET)
> From: cesare...@libero.it
> To: qgis-it-user@lists.osgeo.org
> Subject: [QGIS-it-user] Comandi GDAL in QGIS 3.0
> Message-ID: <812769177.1135033.1521108360...@mail.libero.it>
> Content-Type: text/plain; charset="utf-8"
>
> Lavorando in QGIS.3 con i raster (ad esempio: raster \ estrazione \ curve
> di livello) ottengo la segnalazione:
>
> GDAL command output:
>
> /bin/sh:  gdal_contour:  command not found
> -- parte successiva --
> Un allegato HTML è stato rimosso...
> URL: <
> http://lists.osgeo.org/pipermail/qgis-it-user/attachments/20180315/527610d8/attachment-0001.html
> >
>
> --
>
> Message: 3
> Date: Thu, 15 Mar 2018 04:00:01 -0700 (MST)
> From: Tony75 
> To: qgis-it-user@lists.osgeo.org
> Subject: Re: [QGIS-it-user] Comandi GDAL in QGIS 3.0
> Message-ID: <152601686-0.p...@n6.nabble.com>
> Content-Type: text/plain; charset=UTF-8
>
> Ciao
> Se leggi sotto Ho inserito un post dove parlo proprio di questo problema.
>
> Per curiosità hai problemi anche con grass e python?
>
>
>
> --
> Sent from:
> http://osgeo-org.1560.x6.nabble.com/QGIS-Italian-User-f5250612.html
>
>
> --
>
> Message: 4
> Date: Thu, 15 Mar 2018 12:57:25 +0100
> From: matteo 
> To: "utenti.qgis.it" 
> Subject: [QGIS-it-user] QGIS e il 3D
> Message-ID: <0bb42314-909f-176f-07f3-c8191b5fa...@gmail.com>
> Content-Type: text/plain; charset=utf-8
>
> Successo!
>
> https://www.lutraconsulting.co.uk/crowdfunding/more-qgis-3d/
>
> Matteo
>
>
> --
>
> Message: 5
> Date: Thu, 15 Mar 2018 06:12:40 -0700 (MST)
> From: Tony75 
> To: qgis-it-user@lists.osgeo.org
> Subject: Re: [QGIS-it-user] Qgis3 - Problemi persistono - OSX
> Message-ID: <1521119560168-0.p...@n6.nabble.com>
> Content-Type: text/plain; charset=us-ascii
>
> Se inserisco le stringhe di cui sopra da errore, non trova il percorso
> se scrivo sudo nano ~/.bash_profile
>
> <
> http://osgeo-org.1560.x6.nabble.com/file/t382845/Schermata_2018-03-15_alle_14.png
> >
>
>
>
> --
> Sent from:
> 

[Qgis-user] A description of attributes in the "Derivate group"

[Andrea Peri]

Hi,
when do an identify, in the result windows , appear also a group named
"Derived".
In it there is some information . I understand they are calculate directly
from QGIS.

There is somewhere a description of what mean each of them ?

Thx,


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. . . . . . . . .
qwerty àèìòù
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Re: [Qgis-user] Drill hole section with QGIS 3

[C Hamilton]

Thanks everyone for the explanation. It looks like there is a lot of
interest. I had wondered if this was something that I could work on, but I
see that it would take more time than I have, although it seems like a real
fun project and I hope you can get the support for this.

Best wishes,

Calvin

On Thu, Mar 15, 2018 at 10:00 AM, Ramon Andinach 
wrote:

> Hi Calvin,
>
> In geology, we use a set of drill holes into the ground to interpret the
> space in the earth between them. Depending on what the geologist is
> interested in, we might be plotting the location of an aquifer, or a gold
> seam, an oil reservoir or some other feature. Note here, that I’m
> deliberately picking things that have length, breath and depth, so just
> interpolating a surface is not the same thing.
>
> So, things that you might want to be able to do include:
>  display attributes of the drill hole on a string representing the drill
> hole (or drill trace) in real 3D space.
>  Create slices (sections) of these drill traces (so depth is the right and
> left side), with windows of included data on either side of the slice.
>  Draw polygons snapped to the drill trace to link areas with similar
> features between holes.
>  Build a mesh/wireframe model that links the polygons together
>  Get a volume of said model
>  Create a voxel model of an attribute/s distribution within the mesh.
>
> This is probably a slightly economic geology skewed view, but hopefully
> I’ve left enough geo-jargon out that it’s understandable[1]
>
> Depends on how complex you want to be. A well known GIS package in my neck
> of the woods trumpets the ability to do the slice and dice and section bit,
> but really it’s making up non-earth plans and dressing them up as having
> proper depth (a section). For some people that seems enough.
> But - that sort of approach makes it really difficult if what you’d really
> like to do is show just the bits of the drill holes with say, gold grades
> greater that 20g/t - leaving any other result as transparent - and spin it
> slowly around in 3D so that you can get a sense of the go/d’s distribution
> pattern. This last one is much more complex and only possible if you’re
> working in a truly 3D environment.
>
> Hope that makes some sort of sense. Feel free to ask for clarification.
>
> Ramon.
> [1] I’ve made an attempt to swap out terms I’m used to using for more
> generic explanations or more comp sci friendly terms. Hopefully, mostly
> understandable to both sides now.
>
>
>
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Re: [Qgis-user] Drill hole section with QGIS 3

[perezjnv]

El 16/03/18 06:36, perezjnv escribió:


Hello QGIS community!
I managed to 3D visualization of subsoil  and surface data with the 
library for web threejs (http://threejs.org). Qgis is a plugins for 
this library, but I prefer to use it directly with javascript.
I can publish models of Geology (subsurface structural; contours, 
isopach, failures,  Wells, drill paths,   etc) and embossed or surface 
with models both LIDAR or for example SRTM 30 m with satellite as 
thematic material superimposed images. The outputs is spectacular and 
I got an agile methodology to achieve your web publication.


(Sorry my English is not very good)

Best regards,

José N. Pérez Duin
Analista Mayor
Desarollo Territorial
PDVSA




El 16/03/18 03:14, George Roth escribió:

Hi All, (and apologies if I just threw a wrench in the mailing list by replying 
to a digest),

I'd just like to add that in my experience, there is huge interest and demand 
from the academic earth science community for this kind of functionality. If I 
had a nickel for every time a scientist has asked me about 
visualizing/analyzing their 3-D data in QGIS, then I'd have enough money for a 
grant to fund the development of the whole set of features!

Common applications are often drill holes or cores (rock cores, sediment cores, ice 
cores), but also 2-D sections/transects, usually with seismic equipment. A person, truck, 
boat, snowmobile, or airplane moves in a line and uses a downward-pointing sensor to get 
information on the vertical structure of the ground, ocean, ice, or air. In geospatial 
terms, this is a 2-dimensional vertical "slice," and in our analysis we often 
interpolate many slices horizontally to infer the properties of what lies between each 
transect, like the others have mentioned.

Now, I realize that 3-D functionality in QGIS is in very early stages, and that 
it would take a long time and a lot of effort to get the functionality up to 
the level we've all been dreaming of. QGIS is already starting to conquer much 
of Arc's territory, and I guess we're now dreaming of conquering Fledermaus's? 
(Please don't sue me Fledermaus)

Again, there seems to be huge untapped (ha!) potential in the earth science 
community for this. The academic side has the enthusiasm and expertise, and the 
economic side has the enthusiasm, expertise, AND money. I think the resources 
are out there, but each of these communities just needs to convince the other 
that it's possible.

To Martin (Dobias, initial dev of QGIS 3D)... See what a can of worms you've 
opened!

George Roth
Quantarctica Project Coordinator
Norwegian Polar Institute


--
Today's Topics:

1. Re: Drill hole section with QGIS 3 (Ramon Andinach)
2. Re: Drill hole section with QGIS 3 (Madry, Scott)
3. Re: Drill hole section with QGIS 3 (Bob and Deb)

--

Message: 1
Date: Thu, 15 Mar 2018 22:00:47 +0800
From: Ramon Andinach
To: qgis-user
Subject: Re: [Qgis-user] Drill hole section with QGIS 3
Message-ID:<7bc74d58-8b37-4eaf-822b-a34e0067b...@westnet.com.au>
Content-Type: text/plain; charset="utf-8"

Hi Calvin,

In geology, we use a set of drill holes into the ground to interpret the space 
in the earth between them. Depending on what the geologist is interested in, we 
might be plotting the location of an aquifer, or a gold seam, an oil reservoir 
or some other feature. Note here, that I’m deliberately picking things that 
have length, breath and depth, so just interpolating a surface is not the same 
thing.

So, things that you might want to be able to do include:
  display attributes of the drill hole on a string representing the drill hole 
(or drill trace) in real 3D space.
  Create slices (sections) of these drill traces (so depth is the right and 
left side), with windows of included data on either side of the slice.
  Draw polygons snapped to the drill trace to link areas with similar features 
between holes.
  Build a mesh/wireframe model that links the polygons together  Get a volume 
of said model  Create a voxel model of an attribute/s distribution within the 
mesh.

This is probably a slightly economic geology skewed view, but hopefully I’ve 
left enough geo-jargon out that it’s understandable[1]

Depends on how complex you want to be. A well known GIS package in my neck of 
the woods trumpets the ability to do the slice and dice and section bit, but 
really it’s making up non-earth plans and dressing them up as having proper 
depth (a section). For some people that seems enough.
But - that sort of approach makes it really difficult if what you’d really like 
to do is show just the bits of the drill holes with say, gold grades greater 
that 20g/t - leaving any other result as transparent - and spin it slowly 
around in 3D so that you can get a sense of the go/d’s distribution pattern. 

[QGIS-it-user] Qgis3 - Conversione tra formati

[falcerisimone]

Salve a tutti,
ho segnalato su https://issues.qgis.org/issues/18264
il baco sulla conversione tra formati dei files.
Credo sia essenziale il funzionamento anche per quelli che sono alle prime armi 
con Qgis.
Chi è sviluppatore gentilmente se può dare il debug... Grazie infinite!!
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Re: [Qgis-user] Drill hole section with QGIS 3

[Saber Razmjooei]

Hi All,

Firstly, many thanks to all who contributed to the campaign. We are pleased
to have reached the target.

As you can see from the proposal, the drill holes are not included. But we
are hoping to set the basis to support the sub-terrain. There will be
another round of crowd funding later in the year to add support for voxels
and 3D rasters. Profiles and other custom tools can be added as plugins.

All your feedback and suggestions are welcome. Feel free to add them as
feature request here so we have a list to refer to:
https://issues.qgis.org/projects/qgis/issues

Regards
Saber

On 16 March 2018 at 09:04, Richard Duivenvoorde  wrote:

> For those needing 3D features, may I draw your attention to the
> crowd-funding call of Lutra:
>
> https://www.lutraconsulting.co.uk/crowdfunding/more-qgis-3d/
>
> @lutra/sabel: you probably/maybe can pick some idea's from this thread
> to do?
>
> Regards,
>
> Richard Duivenvoorde
>
>
>
> On 15-03-18 15:00, Ramon Andinach wrote:
> > Hi Calvin,
> >
> > In geology, we use a set of drill holes into the ground to interpret the
> > space in the earth between them. Depending on what the geologist is
> > interested in, we might be plotting the location of an aquifer, or a
> > gold seam, an oil reservoir or some other feature. Note here, that I’m
> > deliberately picking things that have length, breath and depth, so just
> > interpolating a surface is not the same thing.
> >
> > So, things that you might want to be able to do include:
> >  display attributes of the drill hole on a string representing the drill
> > hole (or drill trace) in real 3D space.
> >  Create slices (sections) of these drill traces (so depth is the right
> > and left side), with windows of included data on either side of the
> slice.
> >  Draw polygons snapped to the drill trace to link areas with similar
> > features between holes.
> >  Build a mesh/wireframe model that links the polygons together
> >  Get a volume of said model
> >  Create a voxel model of an attribute/s distribution within the mesh.
> >
> > This is probably a slightly economic geology skewed view, but hopefully
> > I’ve left enough geo-jargon out that it’s understandable[1]
> >
> > Depends on how complex you want to be. A well known GIS package in my
> > neck of the woods trumpets the ability to do the slice and dice and
> > section bit, but really it’s making up non-earth plans and dressing them
> > up as having proper depth (a section). For some people that seems
> enough.
> > But - that sort of approach makes it really difficult if what you’d
> > really like to do is show just the bits of the drill holes with say,
> > gold grades greater that 20g/t - leaving any other result as transparent
> > - and spin it slowly around in 3D so that you can get a sense of the
> > go/d’s distribution pattern. This last one is much more complex and only
> > possible if you’re working in a truly 3D environment.
> >
> > Hope that makes some sort of sense. Feel free to ask for clarification.
> >
> > Ramon.
> > [1] I’ve made an attempt to swap out terms I’m used to using for more
> > generic explanations or more comp sci friendly terms. Hopefully, mostly
> > understandable to both sides now.
> >
> >
> >> On 15 Mar 2018, at 20:31, C Hamilton  >> > wrote:
> >>
> >> Pardon my ignorance on the matter, but what does a drill hole
> >> capability mean? Is it simply making a hole in a polygon or is it much
> >> more complex.
> >>
> >> Thanks,
> >>
> >> Calvin
> >>
> >> On Wed, Mar 14, 2018 at 3:46 PM, John Harrop  >> > wrote:
> >>
> >> It looks like no one has been answering this for you yet and I’m
> >> just catching up on a few days emails after my computer was in the
> >> shop.
> >>
> >> There is active interest in developing a drill hole plugin for
> >> QGIS3 now that 3D is more fully supported.  I also work with drill
> >> holes and have been running them in QGIS fairly easily in plan
> >> view where I just calculate traces to a plan view (either in a
> >> spreadsheet or using code) and apply theme patterns based on the
> >> attributes I kept with the segments.  This has worked reasonable
> >> well with grade and lithology which are two of the main things you
> >> want to see.
> >>
> >> Cross sections have been harder, but those are still “maps” in
> >> non-Earth coordinates.  Again I’ve tended to build those with
> >> projections to a plane in either a spreadsheet or by code.  This
> >> is not as easy to work with as plan view so I am very interested
> >> in seeing the developing interest in getting a drill hole section
> >> plugin for QGIS.  That will really finalize QGIS as the logical
> >> choice for geological exploration work.
> >>
> >> I’ve cc’ed the others I know using QGIS so I hope you can be
> >> included in the list of interested users.
> 

Re: [Qgis-user] Drill hole section with QGIS 3

[Richard Duivenvoorde]

For those needing 3D features, may I draw your attention to the
crowd-funding call of Lutra:

https://www.lutraconsulting.co.uk/crowdfunding/more-qgis-3d/

@lutra/sabel: you probably/maybe can pick some idea's from this thread
to do?

Regards,

Richard Duivenvoorde



On 15-03-18 15:00, Ramon Andinach wrote:
> Hi Calvin,
> 
> In geology, we use a set of drill holes into the ground to interpret the
> space in the earth between them. Depending on what the geologist is
> interested in, we might be plotting the location of an aquifer, or a
> gold seam, an oil reservoir or some other feature. Note here, that I’m
> deliberately picking things that have length, breath and depth, so just
> interpolating a surface is not the same thing.
> 
> So, things that you might want to be able to do include:
>  display attributes of the drill hole on a string representing the drill
> hole (or drill trace) in real 3D space.
>  Create slices (sections) of these drill traces (so depth is the right
> and left side), with windows of included data on either side of the slice.
>  Draw polygons snapped to the drill trace to link areas with similar
> features between holes.
>  Build a mesh/wireframe model that links the polygons together
>  Get a volume of said model
>  Create a voxel model of an attribute/s distribution within the mesh.
> 
> This is probably a slightly economic geology skewed view, but hopefully
> I’ve left enough geo-jargon out that it’s understandable[1]
> 
> Depends on how complex you want to be. A well known GIS package in my
> neck of the woods trumpets the ability to do the slice and dice and
> section bit, but really it’s making up non-earth plans and dressing them
> up as having proper depth (a section). For some people that seems enough. 
> But - that sort of approach makes it really difficult if what you’d
> really like to do is show just the bits of the drill holes with say,
> gold grades greater that 20g/t - leaving any other result as transparent
> - and spin it slowly around in 3D so that you can get a sense of the
> go/d’s distribution pattern. This last one is much more complex and only
> possible if you’re working in a truly 3D environment. 
> 
> Hope that makes some sort of sense. Feel free to ask for clarification.
> 
> Ramon.
> [1] I’ve made an attempt to swap out terms I’m used to using for more
> generic explanations or more comp sci friendly terms. Hopefully, mostly
> understandable to both sides now.
> 
> 
>> On 15 Mar 2018, at 20:31, C Hamilton > > wrote:
>>
>> Pardon my ignorance on the matter, but what does a drill hole
>> capability mean? Is it simply making a hole in a polygon or is it much
>> more complex.
>>
>> Thanks,
>>
>> Calvin
>>
>> On Wed, Mar 14, 2018 at 3:46 PM, John Harrop > > wrote:
>>
>> It looks like no one has been answering this for you yet and I’m
>> just catching up on a few days emails after my computer was in the
>> shop.
>>
>> There is active interest in developing a drill hole plugin for
>> QGIS3 now that 3D is more fully supported.  I also work with drill
>> holes and have been running them in QGIS fairly easily in plan
>> view where I just calculate traces to a plan view (either in a
>> spreadsheet or using code) and apply theme patterns based on the
>> attributes I kept with the segments.  This has worked reasonable
>> well with grade and lithology which are two of the main things you
>> want to see.
>>
>> Cross sections have been harder, but those are still “maps” in
>> non-Earth coordinates.  Again I’ve tended to build those with
>> projections to a plane in either a spreadsheet or by code.  This
>> is not as easy to work with as plan view so I am very interested
>> in seeing the developing interest in getting a drill hole section
>> plugin for QGIS.  That will really finalize QGIS as the logical
>> choice for geological exploration work.
>>
>> I’ve cc’ed the others I know using QGIS so I hope you can be
>> included in the list of interested users.
>>
>> Regards,
>>
>> John Harrop, PGeo, FGS
>> Senior Project Geologist
>> Coast Mountain Geological Ltd
>>
>> PO Box 62
>> Suite 488 - 625 Howe St
>> Vancouver, BC   V6C 2T6
>>
>>
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Re: [Qgis-user] Drill hole section with QGIS 3

[George Roth]

Hi All, (and apologies if I just threw a wrench in the mailing list by replying 
to a digest),

I'd just like to add that in my experience, there is huge interest and demand 
from the academic earth science community for this kind of functionality. If I 
had a nickel for every time a scientist has asked me about 
visualizing/analyzing their 3-D data in QGIS, then I'd have enough money for a 
grant to fund the development of the whole set of features!

Common applications are often drill holes or cores (rock cores, sediment cores, 
ice cores), but also 2-D sections/transects, usually with seismic equipment. A 
person, truck, boat, snowmobile, or airplane moves in a line and uses a 
downward-pointing sensor to get information on the vertical structure of the 
ground, ocean, ice, or air. In geospatial terms, this is a 2-dimensional 
vertical "slice," and in our analysis we often interpolate many slices 
horizontally to infer the properties of what lies between each transect, like 
the others have mentioned.

Now, I realize that 3-D functionality in QGIS is in very early stages, and that 
it would take a long time and a lot of effort to get the functionality up to 
the level we've all been dreaming of. QGIS is already starting to conquer much 
of Arc's territory, and I guess we're now dreaming of conquering Fledermaus's? 
(Please don't sue me Fledermaus)

Again, there seems to be huge untapped (ha!) potential in the earth science 
community for this. The academic side has the enthusiasm and expertise, and the 
economic side has the enthusiasm, expertise, AND money. I think the resources 
are out there, but each of these communities just needs to convince the other 
that it's possible.

To Martin (Dobias, initial dev of QGIS 3D)... See what a can of worms you've 
opened!

George Roth
Quantarctica Project Coordinator
Norwegian Polar Institute


--
Today's Topics:

   1. Re: Drill hole section with QGIS 3 (Ramon Andinach)
   2. Re: Drill hole section with QGIS 3 (Madry, Scott)
   3. Re: Drill hole section with QGIS 3 (Bob and Deb)

--

Message: 1
Date: Thu, 15 Mar 2018 22:00:47 +0800
From: Ramon Andinach 
To: qgis-user 
Subject: Re: [Qgis-user] Drill hole section with QGIS 3
Message-ID: <7bc74d58-8b37-4eaf-822b-a34e0067b...@westnet.com.au>
Content-Type: text/plain; charset="utf-8"

Hi Calvin,

In geology, we use a set of drill holes into the ground to interpret the space 
in the earth between them. Depending on what the geologist is interested in, we 
might be plotting the location of an aquifer, or a gold seam, an oil reservoir 
or some other feature. Note here, that I’m deliberately picking things that 
have length, breath and depth, so just interpolating a surface is not the same 
thing.

So, things that you might want to be able to do include:
 display attributes of the drill hole on a string representing the drill hole 
(or drill trace) in real 3D space.
 Create slices (sections) of these drill traces (so depth is the right and left 
side), with windows of included data on either side of the slice.
 Draw polygons snapped to the drill trace to link areas with similar features 
between holes.
 Build a mesh/wireframe model that links the polygons together  Get a volume of 
said model  Create a voxel model of an attribute/s distribution within the mesh.

This is probably a slightly economic geology skewed view, but hopefully I’ve 
left enough geo-jargon out that it’s understandable[1]

Depends on how complex you want to be. A well known GIS package in my neck of 
the woods trumpets the ability to do the slice and dice and section bit, but 
really it’s making up non-earth plans and dressing them up as having proper 
depth (a section). For some people that seems enough. 
But - that sort of approach makes it really difficult if what you’d really like 
to do is show just the bits of the drill holes with say, gold grades greater 
that 20g/t - leaving any other result as transparent - and spin it slowly 
around in 3D so that you can get a sense of the go/d’s distribution pattern. 
This last one is much more complex and only possible if you’re working in a 
truly 3D environment. 

Hope that makes some sort of sense. Feel free to ask for clarification.

Ramon.
[1] I’ve made an attempt to swap out terms I’m used to using for more generic 
explanations or more comp sci friendly terms. Hopefully, mostly understandable 
to both sides now.


> On 15 Mar 2018, at 20:31, C Hamilton  wrote:
> 
> Pardon my ignorance on the matter, but what does a drill hole capability 
> mean? Is it simply making a hole in a polygon or is it much more complex.
> 
> Thanks,
> 
> Calvin
> 
> On Wed, Mar 14, 2018 at 3:46 PM, John Harrop  > wrote:
> It looks like no one has been answering this