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<div class="moz-cite-prefix">El 16/03/18 06:36, perezjnv escribió:<br>
</div>
<blockquote cite="mid:5AABA53B.4000006@pdvsa.com" type="cite">
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
<div class="moz-cite-prefix"><br>
Hello QGIS community!<br>
I managed to 3D visualization of subsoil and surface data with
the library for web threejs (<a moz-do-not-send="true"
class="moz-txt-link-freetext" href="http://threejs.org">http://threejs.org</a>).
Qgis is a plugins for this library, but I prefer to use it
directly with javascript.<br>
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. <br>
<br>
(Sorry my English is not very good)<br>
<br>
Best regards,<br>
<br>
José N. Pérez Duin<br>
Analista Mayor <br>
Desarollo Territorial<br>
PDVSA<br>
<br>
<br>
<br>
<br>
El 16/03/18 03:14, George Roth escribió:<br>
</div>
<blockquote
cite="mid:b5ec410bf077442e8b891844f1d3e684@MAUD.npolar.no"
type="cite">
<pre wrap="">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 <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:custard@westnet.com.au"><custard@westnet.com.au></a>
To: qgis-user <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:qgis-user@lists.osgeo.org"><qgis-user@lists.osgeo.org></a>
Subject: Re: [Qgis-user] Drill hole section with QGIS 3
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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.
</pre>
<blockquote type="cite">
<pre wrap="">On 15 Mar 2018, at 20:31, C Hamilton <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:adenaculture@gmail.com"><adenaculture@gmail.com></a> 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 <<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:jcharrop@gmail.com">jcharrop@gmail.com</a> <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:jcharrop@gmail.com"><mailto:jcharrop@gmail.com></a>> 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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Message: 2
Date: Thu, 15 Mar 2018 14:20:02 +0000
From: "Madry, Scott" <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:madrys@email.unc.edu"><madrys@email.unc.edu></a>
To: Ramon Andinach <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:custard@westnet.com.au"><custard@westnet.com.au></a>
Cc: qgis-user <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:qgis-user@lists.osgeo.org"><qgis-user@lists.osgeo.org></a>
Subject: Re: [Qgis-user] Drill hole section with QGIS 3
Message-ID: <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:91086189-AD6D-46BE-8B80-C23812B1B862@ad.unc.edu"><91086189-AD6D-46BE-8B80-C23812B1B862@ad.unc.edu></a>
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This is also of interest to the archaeological community, in terms of 3-D representations of excavations, soil strata, location of artifacts, etc. GRASS has Voxel capabilities that allow this, but additional tools like this would be of interest to archaeologists.
Regards,
Scott Madry
Scott Madry, Ph.D.
Research Associate Professor of Archaeology The University of North Carolina at Chapel Hill
Tel 1-919-448-4493
Email: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:madrys@email.unc.edu">madrys@email.unc.edu</a><a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:madrys@email.unc.edu"><mailto:madrys@email.unc.edu></a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="https://scottmadry.web.unc.edu">https://scottmadry.web.unc.edu</a>
Skype: scott madry
On Mar 15, 2018, at 10:00 AM, Ramon Andinach <<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:custard@westnet.com.au">custard@westnet.com.au</a><a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:custard@westnet.com.au"><mailto:custard@westnet.com.au></a>> wrote:
This sender failed our fraud detection checks and may not be who they appear to be. Learn about spoofing<a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="http://aka.ms/LearnAboutSpoofing"><http://aka.ms/LearnAboutSpoofing></a>
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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 <<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:adenaculture@gmail.com">adenaculture@gmail.com</a><a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:adenaculture@gmail.com"><mailto:adenaculture@gmail.com></a>> 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 <<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:jcharrop@gmail.com">jcharrop@gmail.com</a><a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:jcharrop@gmail.com"><mailto:jcharrop@gmail.com></a>> 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
_______________________________________________
Qgis-user mailing list
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a><a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:Qgis-user@lists.osgeo.org"><mailto:Qgis-user@lists.osgeo.org></a>
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Message: 3
Date: Thu, 15 Mar 2018 11:57:51 -0700
From: Bob and Deb <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:bobdebm@gmail.com"><bobdebm@gmail.com></a>
To: "Madry, Scott" <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:madrys@email.unc.edu"><madrys@email.unc.edu></a>
Cc: Ramon Andinach <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:custard@westnet.com.au"><custard@westnet.com.au></a>, qgis-user
<a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:qgis-user@lists.osgeo.org"><qgis-user@lists.osgeo.org></a>
Subject: Re: [Qgis-user] Drill hole section with QGIS 3
Message-ID:
<a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:CAHEX0wwSR_8buxyPhePB20inou=tkRV=+CiiEobU-tXQTms0Kw@mail.gmail.com"><CAHEX0wwSR_8buxyPhePB20inou=tkRV=+CiiEobU-tXQTms0Kw@mail.gmail.com></a>
Content-Type: text/plain; charset="utf-8"
In the past, I've was hoping to make a QGIS plugin to do Liquefaction <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="https://en.wikipedia.org/wiki/Soil_liquefaction"><https://en.wikipedia.org/wiki/Soil_liquefaction></a>Analysis . This analysis uses a borehole database, ground motion grids, and historical high ground water grids. What prevented me from doing it was that QGIS Relations can not work with composite keys <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="https://issues.qgis.org/issues/9531"><https://issues.qgis.org/issues/9531></a>. So, I hope that any work on getting QGIS to work with boreholes would address this problem.
-Bob
On Thu, Mar 15, 2018 at 7:20 AM, Madry, Scott <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:madrys@email.unc.edu"><madrys@email.unc.edu></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">This is also of interest to the archaeological community, in terms of
3-D representations of excavations, soil strata, location of artifacts, etc.
GRASS has Voxel capabilities that allow this, but additional tools
like this would be of interest to archaeologists.
Regards,
Scott Madry
Scott Madry, Ph.D.
Research Associate Professor of Archaeology The University of North
Carolina at Chapel Hill
Tel 1-919-448-4493 <(919)%20448-4493>
Email: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:madrys@email.unc.edu">madrys@email.unc.edu</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="https://scottmadry.web.unc.edu">https://scottmadry.web.unc.edu</a>
Skype: scott madry
On Mar 15, 2018, at 10:00 AM, Ramon Andinach <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:custard@westnet.com.au"><custard@westnet.com.au></a>
wrote:
This sender failed our fraud detection checks and may not be who they
appear to be. Learn about spoofing <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="http://aka.ms/LearnAboutSpoofing"><http://aka.ms/LearnAboutSpoofing></a>
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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 <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:adenaculture@gmail.com"><adenaculture@gmail.com></a> 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 <a moz-do-not-send="true" class="moz-txt-link-rfc2396E" href="mailto:jcharrop@gmail.com"><jcharrop@gmail.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">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
</pre>
</blockquote>
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