Re: [Qgis-user] LIDAR

[Saber Razmjooei via QGIS-User]

Hi,

We are adding Virtual Point Cloud format and will be ready in QGIS later
this year (June 2023):
https://github.com/PDAL/wrench#virtual-point-clouds-vpc

This should address your issue. But meanwhile you can combine all your
files into a single COPC file.

Kind regards
Saber

On Wed, 15 Feb 2023 at 02:56, Nicolas Cadieux via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> Hi,
>
> On regular raster and vector layers, you can also right click on the layer
> in the layer manager and cut and paste the style.  I figure it must be the
> same with LiDAR.  CloudCompare is also very good for working with LiDAR.  I
> have been working with files with over 250 millions points lately with no
> trouble.  Same thing in QGIS. So far so good!
>
> Nicolas Cadieux
> https://gitlab.com/njacadieux
>
> Le 14 févr. 2023 à 09:05, Kirk Schmidt via QGIS-User <
> qgis-user@lists.osgeo.org> a écrit :
>
> 
>
> Hi Allan:
>
> One way is to combine the files into a super file which may not be an
> option due to size.  The other would be to find the total range of z values
> in your project area and set the min and max symbology for the Z
> attribute.  while using the attributes by ramp option.  You can save the
> style and use it for the remaining point clouds.
>
> Kirk Schmidt
> On 2/13/2023 11:49 PM, Allan Younger via QGIS-User wrote:
>
> Hi everyone,
> I have multiple Lidar downloaded las files, on opening find each has its
> individual range of levels.
> How can I shade uniform levels?
>  200m plus points in several of blocks.
> Chrs
> AY
>
>
>
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> --
> Kirk Schmidt, MScF, BScF, RPF
> General Manager
> Nortek Resource Solutions Inc.
> 26 Church Road
> Sutherlands River, NS
> B0K 1W0
> Tel (902) 922.3607
> Email: k...@nortekresources.com
> Web: www.nortekresources.com
>
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-- 
Saber Razmjooei
www.lutraconsulting.co.uk
+44 (0)7568 129733
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Re: [Qgis-user] LIDAR

[Nicolas Cadieux via QGIS-User]

Hi,

On regular raster and vector layers, you can also right click on the layer in 
the layer manager and cut and paste the style.  I figure it must be the same 
with LiDAR.  CloudCompare is also very good for working with LiDAR.  I have 
been working with files with over 250 millions points lately with no trouble.  
Same thing in QGIS. So far so good!

Nicolas Cadieux
https://gitlab.com/njacadieux

> Le 14 févr. 2023 à 09:05, Kirk Schmidt via QGIS-User 
>  a écrit :
> 
> 
> Hi Allan:
> 
> One way is to combine the files into a super file which may not be an option 
> due to size.  The other would be to find the total range of z values in your 
> project area and set the min and max symbology for the Z attribute.  while 
> using the attributes by ramp option.  You can save the style and use it for 
> the remaining point clouds.
> 
> Kirk Schmidt
> 
> On 2/13/2023 11:49 PM, Allan Younger via QGIS-User wrote:
>> Hi everyone,
>> I have multiple Lidar downloaded las files, on opening find each has its 
>> individual range of levels.
>> How can I shade uniform levels?
>>  200m plus points in several of blocks.
>> Chrs
>> AY
>> 
>> 
>> 
>> 
>> ___
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>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
> -- 
> Kirk Schmidt, MScF, BScF, RPF
> General Manager
> Nortek Resource Solutions Inc.
> 26 Church Road
> Sutherlands River, NS
> B0K 1W0
> Tel (902) 922.3607
> Email: k...@nortekresources.com
> Web: www.nortekresources.com
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Re: [Qgis-user] LIDAR

[Kirk Schmidt via QGIS-User]

Hi Allan:

One way is to combine the files into a super file which may not be an 
option due to size.  The other would be to find the total range of z 
values in your project area and set the min and max symbology for the Z 
attribute.  while using the attributes by ramp option.  You can save the 
style and use it for the remaining point clouds.


Kirk Schmidt

On 2/13/2023 11:49 PM, Allan Younger via QGIS-User wrote:

Hi everyone,
I have multiple Lidar downloaded las files, on opening find each has 
its individual range of levels.

How can I shade uniform levels?
 200m plus points in several of blocks.
Chrs
AY



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--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
26 Church Road
Sutherlands River, NS
B0K 1W0
Tel (902) 922.3607
Email:k...@nortekresources.com
Web:www.nortekresources.com
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Re: [Qgis-user] LIDAR

[jean Lukusa via QGIS-User]

Hi sur.
Would you send thé link? I want to download too.

Jean LUKUSA , B.Sc.Geology, MAusIMM(3053232)
luku...@gmail.com
+243812156128

Le mar. 14 févr. 2023 à 04:59, Allan Younger via QGIS-User <
qgis-user@lists.osgeo.org> a écrit :

> Hi everyone,
> I have multiple Lidar downloaded las files, on opening find each has its
> individual range of levels.
> How can I shade uniform levels?
>  200m plus points in several of blocks.
> Chrs
> AY
>
>
> ___
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[Qgis-user] LIDAR

[Allan Younger via QGIS-User]

Hi everyone,
I have multiple Lidar downloaded las files, on opening find each has its 
individual range of levels.

How can I shade uniform levels?
 200m plus points in several of blocks.
Chrs
AY

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Re: [Qgis-user] Lidar vertical datum to EGM2008

[Nicolas Cadieux]

Hi,

You should be able to find resources here.

https://earth-info.nga.mil/index.php?dir=wgs84=wgs84

Nicolas

On 2021-06-21 7:23 a.m., fiat lux wrote:

Hi all,

I have a question related to vertical datum conversion; e.g. for AHN3 
lidar data. Can you direct me to resources, or give me tips/tool on 
how to convert AHN3 lidar vertical datum to EGM2008?


Thanks very much,
Fiat

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--
Nicolas Cadieux
https://gitlab.com/njacadieux

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[Qgis-user] Lidar vertical datum to EGM2008

[fiat lux]

Hi all,

I have a question related to vertical datum conversion; e.g. for AHN3 lidar
data. Can you direct me to resources, or give me tips/tool on how to
convert AHN3 lidar vertical datum to EGM2008?

Thanks very much,
Fiat
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Re: [Qgis-user] Lidar download

[Martin Dobias]

Hi

On Fri, Mar 5, 2021 at 3:13 AM Nicolas Cadieux 
wrote:

>  LiDAR is new in QGIS and i’am not sure what files formats are supported
> yet.  I had trouble with the current version.  It did show support for a
> json file format but I expect the las/laz format support will pop up once
> the bugs are worked out.  In the mean while, I would use CloudCompare
> (OpenSource) to read the cloud and create the DEM.  Then, you could import
> the DEM into QGIS to extract the contour lines.
>

QGIS 3.18 does support LAS/LAZ format to load point cloud datasets. The
problem is that some installers for some platforms (most notably the
Windows installer) do not include the PDAL library needed to read LAS/LAZ
files. There is now an experimental alternative installer which includes
also PDAL library and thus it can read LAS/LAZ files too:
https://qgis.org/downloads/QGIS-OSGeo4W-3.18.0-1.msi

Please note that 3.18.0 release has been pulled back few days ago because
of several major bugs, so please consider this as a testing release where
some things may not work.

Regards
Martin
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Re: [Qgis-user] Lidar download

[Sebastian Gutwein]

Jean,
In the US most areas that have flown LiDAR also provide DEM (raster terrain
models) created from the ground points of the datasets.
>From there it is easy to create contours.
NOAA has an inventory of all the areas that have data:
https://coast.noaa.gov/inventory/?redirect=301ocm

On Thu, Mar 4, 2021 at 9:12 PM Nicolas Cadieux 
wrote:

> Hi,
>
> If you want to create contour lines, you will need a Lidar data point and
> then create a DEM from which you will extract contour lines. (That’s the
> most common way of do it!)
>
>  LiDAR is new in QGIS and i’am not sure what files formats are supported
> yet.  I had trouble with the current version.  It did show support for a
> json file format but I expect the las/laz format support will pop up once
> the bugs are worked out.  In the mean while, I would use CloudCompare
> (OpenSource) to read the cloud and create the DEM.  Then, you could import
> the DEM into QGIS to extract the contour lines.
>
> If you want us to propose à data sets, then, I suggest you give us an idea
> of where you are working.  LiDar data is currently spars depending on the
> country and area.  You may get lucky as more open data is being produced
> every day.
>
>  I may suggest the lastool (openlaso) user list.  They have good knowledge
> of lidar data sources.  Lastool is a suit of tool to work with LiDar.  Some
> tools are OpenSource and some are not.  Read the individual license so you
> don’t violate the licenses.
>
> Good luck
>
> Nicolas Cadieux
> https://gitlab.com/njacadieux
>
> Le 4 mars 2021 à 09:37, jean Lukusa  a écrit :
>
> 
> Thank dear Kirk
> I
> My purpose is to generate topographical contour.
> Do you Can suggest to my what lidar .
>
> Jean Lukusa
> B.Sc. Geology
> Trained on Jorc  Code
> GIS  Operator
> +243812156128
>
> Le jeu. 4 mars 2021 à 14:32, Kirk Schmidt  a
> écrit :
>
>> Hi Jean:
>>
>> I am not sure what you are looking for?
>>
>> Do you want to download a lidar derived image (such as a surface model)
>> or do you want to work with raw  point cloud data?
>>
>> Kirk Schmidt
>> On 3/4/2021 8:41 AM, jean Lukusa wrote:
>>
>> Hi all ,
>> how Can I download Lidar image from  Qgis 3.18.0 ?
>>
>> Jean Lukusa
>> B.Sc. Geology
>> Trained on Jorc  Code
>> GIS  Operator
>> +243812156128
>>
>> ___
>> Qgis-user mailing listqgis-u...@lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
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>>
>> --
>> Kirk Schmidt, MScF, BScF, RPF
>> General Manager
>> Nortek Resource Solutions Inc.
>> RR # 1
>> Thorburn, NS
>> B0K 1W0
>> Tel (902) 922.3607
>> Email: k...@nortekresources.com
>> Web: www.nortekresources.com
>>
>> ___
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Re: [Qgis-user] Lidar download

[Nicolas Cadieux]

Hi,

If you want to create contour lines, you will need a Lidar data point and then 
create a DEM from which you will extract contour lines. (That’s the most common 
way of do it!)

 LiDAR is new in QGIS and i’am not sure what files formats are supported yet.  
I had trouble with the current version.  It did show support for a json file 
format but I expect the las/laz format support will pop up once the bugs are 
worked out.  In the mean while, I would use CloudCompare (OpenSource) to read 
the cloud and create the DEM.  Then, you could import the DEM into QGIS to 
extract the contour lines.  

If you want us to propose à data sets, then, I suggest you give us an idea of 
where you are working.  LiDar data is currently spars depending on the country 
and area.  You may get lucky as more open data is being produced every day.  

 I may suggest the lastool (openlaso) user list.  They have good knowledge of 
lidar data sources.  Lastool is a suit of tool to work with LiDar.  Some tools 
are OpenSource and some are not.  Read the individual license so you don’t 
violate the licenses.

Good luck

Nicolas Cadieux
https://gitlab.com/njacadieux

> Le 4 mars 2021 à 09:37, jean Lukusa  a écrit :
> 
> 
> Thank dear Kirk 
> I
> My purpose is to generate topographical contour.
> Do you Can suggest to my what lidar .
> 
> Jean Lukusa
> B.Sc. Geology
> Trained on Jorc  Code
> GIS  Operator 
> +243812156128
> 
>> Le jeu. 4 mars 2021 à 14:32, Kirk Schmidt  a écrit 
>> :
>> Hi Jean:
>> 
>> I am not sure what you are looking for?
>> 
>> Do you want to download a lidar derived image (such as a surface model) or 
>> do you want to work with raw  point cloud data?
>> 
>> Kirk Schmidt
>> 
>>> On 3/4/2021 8:41 AM, jean Lukusa wrote:
>>> Hi all ,
>>> how Can I download Lidar image from  Qgis 3.18.0 ?
>>> 
>>> Jean Lukusa
>>> B.Sc. Geology
>>> Trained on Jorc  Code
>>> GIS  Operator 
>>> +243812156128
>>> 
>>> 
>>> ___
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>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> -- 
>> Kirk Schmidt, MScF, BScF, RPF
>> General Manager
>> Nortek Resource Solutions Inc.
>> RR # 1
>> Thorburn, NS
>> B0K 1W0
>> Tel (902) 922.3607
>> Email: k...@nortekresources.com
>> Web: www.nortekresources.com
>> ___
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Re: [Qgis-user] Lidar download

[jean Lukusa]

Thank dear Kirk
I
My purpose is to generate topographical contour.
Do you Can suggest to my what lidar .

Jean Lukusa
B.Sc. Geology
Trained on Jorc  Code
GIS  Operator
+243812156128

Le jeu. 4 mars 2021 à 14:32, Kirk Schmidt  a
écrit :

> Hi Jean:
>
> I am not sure what you are looking for?
>
> Do you want to download a lidar derived image (such as a surface model) or
> do you want to work with raw  point cloud data?
>
> Kirk Schmidt
> On 3/4/2021 8:41 AM, jean Lukusa wrote:
>
> Hi all ,
> how Can I download Lidar image from  Qgis 3.18.0 ?
>
> Jean Lukusa
> B.Sc. Geology
> Trained on Jorc  Code
> GIS  Operator
> +243812156128
>
> ___
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> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
> --
> Kirk Schmidt, MScF, BScF, RPF
> General Manager
> Nortek Resource Solutions Inc.
> RR # 1
> Thorburn, NS
> B0K 1W0
> Tel (902) 922.3607
> Email: k...@nortekresources.com
> Web: www.nortekresources.com
>
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Re: [Qgis-user] Lidar download

[Kirk Schmidt]

Hi Jean:

I am not sure what you are looking for?

Do you want to download a lidar derived image (such as a surface model) 
or do you want to work with raw  point cloud data?


Kirk Schmidt

On 3/4/2021 8:41 AM, jean Lukusa wrote:

Hi all ,
how Can I download Lidar image from  Qgis 3.18.0 ?

Jean Lukusa
B.Sc. Geology
Trained on Jorc  Code
GIS  Operator
+243812156128

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--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email: k...@nortekresources.com
Web: www.nortekresources.com

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[Qgis-user] Lidar download

[jean Lukusa]

Hi all ,
how Can I download Lidar image from  Qgis 3.18.0 ?

Jean Lukusa
B.Sc. Geology
Trained on Jorc  Code
GIS  Operator
+243812156128
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Re: [Qgis-user] LiDAR Data in QGIS

[Randal Hale]

I'm dealing with a different issue here in Tennessee - We have the original 
files except they are locked in zlas (ESRI Proprietary Format) BUT - I can get 
it out of zlas so I can have fun with the LAS files. 

Good news is - LAS was a thing in 2003 
(https://www.asprs.org/committee-general/laser-las-file-format-exchange-activities.html)
 so you might be able to 
get those OR at least a CSV file. 

You might have to go back to the vendor. They probably have them but might 
take some work to pry the files out of them. 2003 might be a life time ago for 
many. 

Good luck though! and take a look at GRASS and PDAL. I feed the LIDAR data 
into GRASS and pull the returns out or reprocess it. I'm not that great at 
doing it but learning. 

Randy

-- 
Randal Hale
North River Geographic Systems. Inc 
rjh...@northrivergeographic.com
(423) 653-3611 



On Monday, December 11, 2017 8:33:49 AM EST Tyler Veinot wrote:
> Randy;
> I figured as much; the DEM/DSM/DTM's were delivered to us from the province
> in that Esri Binary Grid Format, so we do not have the original LiDAR
> LAS/LAZ files on hand. It would also seem that we didn't keep the LAS/LAZ
> files from the original 2003 LiDAR survey of the city either.
> I sent an email to the province to see if they have and are willing to
> share the original data but got no reply as of yet.
> Tyler
> 
> On Mon, Dec 11, 2017 at 9:10 AM, Randal Hale <
> 
> rjh...@northrivergeographic.com> wrote:
> > I've only been watching this thread when I remember - so My apologies.
> > 
> > If I go back to the original thread - if these are in ADF I believe that's
> > ESRI's GRID Format. Which means they are what they are and you can't do
> > much
> > with them. They have only the last return (or if I remember correctly
> > returns
> > classed 2,8, etc).
> > 
> > If you have zlas, las, or laz - I would suggest GRASS for processing:
> > https://
> > grasswiki.osgeo.org/wiki/LIDAR
> > 
> > If you don't have any of the las/laz formats - you might want to do some
> > research and see if they were delivered with the LIDAR dataset you have or
> > if
> > they weren't request them. They may be sitting somewhere on a
> > shelf/forgotten
> > folder on a server. You can do a lot more with the original LIDAR files
> > like
> > pull tree heights or possibly rebuild the surface (be it dsm/dtm/dem etc).
> > 
> > Randy
> > 
> > --
> > Randal Hale
> > North River Geographic Systems. Inc
> > rjh...@northrivergeographic.com
> > (423) 653-3611
> > 
> > On Monday, December 11, 2017 7:27:00 AM EST Tyler Veinot wrote:
> > > All;
> > > But if I convert the DEM or DSM to geotiff I still wont get back the hit
> > > order or the classification values will I? I will just have the data I
> > 
> > have
> > 
> > > as processed in a different format. What I really need is the original
> > > LiDAR datasets if I am understanding this correctly.
> > > As for DTM, DSM, and DEM, The province my municipality is in has decided
> > > that; DTM is a surface model which includes surface features + ground
> > 
> > hits
> > 
> > > + breaklines. A DEM is ground hits, and a DSM as is the surface +
> > 
> > features
> > 
> > > without added breaklines. I have found definitions online to support
> > > both
> > > view points on the matter; just an FYI my text books agree with you on
> > 
> > the
> > 
> > > matter. I blame AutoCAD/CADD users for the discrepancies because, in my
> > > experience according to the EIT's and other CADD users, a DTM is all of
> > 
> > the
> > 
> > > above and a DSM and DEM doesn't exist lol.
> > > Thanks for the help on this;
> > > Tyler
> > > 
> > > 
> > > On Mon, Dec 11, 2017 at 6:31 AM, Richard McDonnell <
> > 
> > richard.mcdonn...@opw.ie
> > 
> > > > wrote:
> > > > 
> > > > Morning Tyler.
> > > > Nick is quite right. The files you have (ADF) are either DTM's or
> > 
> > DSM's.
> > 
> > > > They are processed datasets.
> > > > To fix the GRASS, SAGA issue, you can use GDAL to convert them to
> > 
> > GeoTiff,
> > 
> > > > using the gdal_translate, which can be found in the Processing toolbox
> > 
> > and
> > 
> > > > will do it for a few using batch (Note Point one below).
> > > > The other option would be to use the Script below to convert ADF to
> > > > GeoTiff.
> > > > 
> > > > *@echo off
> > > > SET startpath=%1
> > > > FOR /R %startpath% %%f IN (w001001.adf) do (call :translate "%%f")
> > > > pause
> > > > GOTO :eof
> > > > 
> > > > :translate
> > > > :
> > > >   SET var=%~dp1
> > > >   ECHO Translating %var%hdr.adf to %var:~0,-1%.tif
> > > >   gdal_translate -co "NUM_THREADS=ALL_CPUS" -co "TILED=YES" -co
> > > >   "COMPRESS=LZW" %var%hdr.adf %var:~0,-1%.tif*>
> > > > 
> > > > The tool/script works in the following way.
> > > > 
> > > >1. *ADF Image names are the containing folder name*
> > > >2. You must run this Batch in the Root folder for your ADFs (one
> > 
> > level
> > 
> > > >up from the ADF files)
> > > >3. Paste/save the batch in the root folder
> > > >4. Open an 

Re: [Qgis-user] LiDAR Data in QGIS

[Randal Hale]

I've only been watching this thread when I remember - so My apologies. 

If I go back to the original thread - if these are in ADF I believe that's 
ESRI's GRID Format. Which means they are what they are and you can't do much 
with them. They have only the last return (or if I remember correctly returns 
classed 2,8, etc). 

If you have zlas, las, or laz - I would suggest GRASS for processing: https://
grasswiki.osgeo.org/wiki/LIDAR

If you don't have any of the las/laz formats - you might want to do some 
research and see if they were delivered with the LIDAR dataset you have or if 
they weren't request them. They may be sitting somewhere on a shelf/forgotten 
folder on a server. You can do a lot more with the original LIDAR files like 
pull tree heights or possibly rebuild the surface (be it dsm/dtm/dem etc). 

Randy

-- 
Randal Hale
North River Geographic Systems. Inc 
rjh...@northrivergeographic.com
(423) 653-3611 



On Monday, December 11, 2017 7:27:00 AM EST Tyler Veinot wrote:
> All;
> But if I convert the DEM or DSM to geotiff I still wont get back the hit
> order or the classification values will I? I will just have the data I have
> as processed in a different format. What I really need is the original
> LiDAR datasets if I am understanding this correctly.
> As for DTM, DSM, and DEM, The province my municipality is in has decided
> that; DTM is a surface model which includes surface features + ground hits
> + breaklines. A DEM is ground hits, and a DSM as is the surface + features
> without added breaklines. I have found definitions online to support both
> view points on the matter; just an FYI my text books agree with you on the
> matter. I blame AutoCAD/CADD users for the discrepancies because, in my
> experience according to the EIT's and other CADD users, a DTM is all of the
> above and a DSM and DEM doesn't exist lol.
> Thanks for the help on this;
> Tyler
> 
> 
> On Mon, Dec 11, 2017 at 6:31 AM, Richard McDonnell  > wrote:
> > 
> > Morning Tyler.
> > Nick is quite right. The files you have (ADF) are either DTM's or DSM's.
> > They are processed datasets.
> > To fix the GRASS, SAGA issue, you can use GDAL to convert them to GeoTiff,
> > using the gdal_translate, which can be found in the Processing toolbox and
> > will do it for a few using batch (Note Point one below).
> > The other option would be to use the Script below to convert ADF to
> > GeoTiff.
> > 
> > *@echo off
> > SET startpath=%1
> > FOR /R %startpath% %%f IN (w001001.adf) do (call :translate "%%f")
> > pause
> > GOTO :eof
> > 
> > :translate
> > :
> >   SET var=%~dp1
> >   ECHO Translating %var%hdr.adf to %var:~0,-1%.tif
> >   gdal_translate -co "NUM_THREADS=ALL_CPUS" -co "TILED=YES" -co
> >   "COMPRESS=LZW" %var%hdr.adf %var:~0,-1%.tif*> 
> > The tool/script works in the following way.
> > 
> >1. *ADF Image names are the containing folder name*
> >2. You must run this Batch in the Root folder for your ADFs (one level
> >up from the ADF files)
> >3. Paste/save the batch in the root folder
> >4. Open an instance of OSGeo4W Shell or its Linux counterpart navigate
> >to the root folder and run the script by typing *adf2tiff.bat*
> >5. It will start to write the Tiff files into the root folder.
> > 
> > Hope this helps, or goes some way to helping.
> > Regards
> > 
> > Richard.
> > --
> > *Richard McDonnell*
> > *GIS Specialist PgD GIS AssocSCSI*
> > 
> > 
> > 
> > 
> > Email Disclaimer: http://www.opw.ie/en/disclaimer/
> > 
> > ___
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> > Qgis-user@lists.osgeo.org
> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

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Re: [Qgis-user] LiDAR Data in QGIS

[Tyler Veinot]

All;
But if I convert the DEM or DSM to geotiff I still wont get back the hit
order or the classification values will I? I will just have the data I have
as processed in a different format. What I really need is the original
LiDAR datasets if I am understanding this correctly.
As for DTM, DSM, and DEM, The province my municipality is in has decided
that; DTM is a surface model which includes surface features + ground hits
+ breaklines. A DEM is ground hits, and a DSM as is the surface + features
without added breaklines. I have found definitions online to support both
view points on the matter; just an FYI my text books agree with you on the
matter. I blame AutoCAD/CADD users for the discrepancies because, in my
experience according to the EIT's and other CADD users, a DTM is all of the
above and a DSM and DEM doesn't exist lol.
Thanks for the help on this;
Tyler


On Mon, Dec 11, 2017 at 6:31 AM, Richard McDonnell  wrote:

> Morning Tyler.
> Nick is quite right. The files you have (ADF) are either DTM's or DSM's.
> They are processed datasets.
> To fix the GRASS, SAGA issue, you can use GDAL to convert them to GeoTiff,
> using the gdal_translate, which can be found in the Processing toolbox and
> will do it for a few using batch (Note Point one below).
> The other option would be to use the Script below to convert ADF to
> GeoTiff.
>
> *@echo off
> SET startpath=%1
> FOR /R %startpath% %%f IN (w001001.adf) do (call :translate "%%f")
> pause
> GOTO :eof
>
> :translate
>   SET var=%~dp1
>   ECHO Translating %var%hdr.adf to %var:~0,-1%.tif
>   gdal_translate -co "NUM_THREADS=ALL_CPUS" -co "TILED=YES" -co 
> "COMPRESS=LZW" %var%hdr.adf %var:~0,-1%.tif*
>
> The tool/script works in the following way.
>
>1. *ADF Image names are the containing folder name*
>2. You must run this Batch in the Root folder for your ADFs (one level
>up from the ADF files)
>3. Paste/save the batch in the root folder
>4. Open an instance of OSGeo4W Shell or its Linux counterpart navigate
>to the root folder and run the script by typing *adf2tiff.bat*
>5. It will start to write the Tiff files into the root folder.
>
> Hope this helps, or goes some way to helping.
> Regards
>
> Richard.
> --
> *Richard McDonnell*
> *GIS Specialist PgD GIS AssocSCSI*
>
> 
>
>
> Email Disclaimer: http://www.opw.ie/en/disclaimer/
>
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Re: [Qgis-user] LiDAR Data in QGIS

[Richard McDonnell]

Morning Tyler.
Nick is quite right. The files you have (ADF) are either DTM's or DSM's. 
They are processed datasets.
To fix the GRASS, SAGA issue, you can use GDAL to convert them to 
GeoTiff, using the gdal_translate, which can be found in the Processing 
toolbox and will do it for a few using batch (Note Point one below).

The other option would be to use the Script below to convert ADF to GeoTiff.

*@echo off SET startpath=%1 FOR /R %startpath% %%f IN (w001001.adf) do 
(call :translate "%%f") pause GOTO :eof :translate SET var=%~dp1 ECHO 
Translating %var%hdr.adf to %var:~0,-1%.tif gdal_translate -co 
"NUM_THREADS=ALL_CPUS" -co "TILED=YES" -co "COMPRESS=LZW" %var%hdr.adf 
%var:~0,-1%.tif*


The tool/script works in the following way.

1. *ADF Image names are the containing folder name*
2. You must run this Batch in the Root folder for your ADFs (one level
   up from the ADF files)
3. Paste/save the batch in the root folder
4. Open an instance of OSGeo4W Shell or its Linux counterpart navigate
   to the root folder and run the script by typing */adf2tiff.bat/*
5. It will start to write the Tiff files into the root folder.

Hope this helps, or goes some way to helping.
Regards

Richard.
--
*_Richard McDonnell_*
*GIS Specialist PgD GIS AssocSCSI*

OPW - Ag féachaint don am atá le teacht - Ag caomhnú ón am atá thart
OPW - Looking to the future - Caring for the past

***
Email Disclaimer: http://www.opw.ie/en/disclaimer/

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[Qgis-user] LiDAR Data in QGIS

[Tyler Veinot]

Hello;
I need some education on LiDAR data, we currently have datasets in an Esri
format that seems to be a collection of ADF files. These files consist of
ground hits (DEM) and surface hits (DSM). When I bring them into QGIS I get
raster symbology options but when I read this link
https://rstudio-pubs-static.s3.amazonaws.com/230154_30a0bbf22e2a49ecbfa1b72b2c7a8f96.html
It talks about various other values that should be stored to help process
and visualize the data but I do not see any of those values in our data. I
am not sure if I am doing something wrong or if the data has been stripped
down to only represent elevations. Is there anyway these file formats can
be converted to something the SAGA and Grass tolls can use or do I need to
track down the raw data from the original source?
Thanks;
Tyler
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[Qgis-user] Lidar

[Nomeneta Saili]

Hi Guys,

Are there any free tools to work with Lidar data on QGIS?.

I found rapidlasso but the lic pirce is too steep for me.
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Re: [Qgis-user] Lidar

[Nicolas Cadieux]

Hi,

There are a number of open source tool to work with Lidar with or outside of 
QGIS.

Lastools has some open source tools. Read the licence file to figure out what 
is open source and what is not.  If it for professional work, lastools are very 
fast so you might save money if you buy it. 

Saga has some Lidar libraries, viewers and so does Grass. You can also use the 
gdal_grid to do a DEM using the nearest neighbor algorithm and a 3 or 4 m 
radius.  (Use csv file with a vrt file).  Stay away from shp.

You can then fill in the no data value with gd. If gdal is slow, I have 
recompiled it on windows 64 to make it much faster (but you will need memory). 
I can send it to you. You can also try the gdal dev 2.1. That has been modified 
for extra speed but I need to test it.

To manipulate data, you can use vim for text file up to 2 or 3 GB. If your file 
are bigger, it is better to use python directly.


There is also cloud compare, Fusion, Mcc-lidar library.  Also have a look at 
this.

http://applied-geosolutions.github.io/lidar2dems/

And www.idaholidar.org/tools/free

Email me if you need help.


Nicolas Cadieux M.Sc.
Les Entreprises Archéotec inc. 
8548, rue Saint-Denis Montréal H2P 2H2
Téléphone: 514.381.5112  Fax: 514.381.4995
www.archeotec.ca

On Jun 25, 2015 6:32 PM, Nome [via OSGeo.org] 
ml-node+s1560n5213026...@n6.nabble.com wrote:

 Hi Guys,

 Are there any free tools to work with Lidar data on QGIS?.

 I found rapidlasso but the lic pirce is too steep for me. 

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[Qgis-user] Lidar Grass Tools from Qgis

[Aitor Bastarrika]

Dear all,
I can't execute the Lidar Grass Tools (v.lidar.edgedetection for 
example) from QGIS (2.8.1 Wien) (neither Grass 6.4 nor 7.0) using the 
processor plugin. Reading the log file, it seems that although the input 
I set is a 3D Shapefile, it doesn't recognize it as is. In pure grass 
there is a v.to.3d command but that command is not included in the 
processing commands.


Any help would be appreciated,

Best regards,
Aitor
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Re: [Qgis-user] lidar visualization in qgis

[antonio valanzano]

Dear  Vincent
thanks for the interest in this discussion.

I am not a developer but a qgis user and my intention is only to discuss
with other users about those minimal functionalities so that somone who is
going to develop a plugin/add core functions has a shared idea of what qgis
users expect.

So I am not  able to discuss about technical questions of what kind of
library should be used.

However I agree with you about adding the support for PostgreSQL PointCloud
support since this is already an available datasource.

Antonio Valanzano






2014-03-25 21:25 GMT+01:00 Vincent Picavet vincent...@oslandia.com:

 Hello,

 Le mardi 25 mars 2014 21:08:24, antonio valanzano a écrit :
  I would like to start a discussion about the minimal functionalities
 that a
  new lidar plugin or a  core function  should present.
 
  Based on my experience the minimal requirements are:
 
  - to read data in LAS format
  - to visualize points based on classification or intensity
  - to allow the filtering of points based on classification
  - to allow the selection of points with spatial relationship with other
  layers
  - to export filtered points or selected points in LAS format

 + PostgreSQL PointCloud support

 Do you plan any PDAL and/or PCL integration into the core or Processing ?
 Maybe pointclouds is more for a second step with data processing
 capabilities.

 http://www.pdal.io/
 http://pointclouds.org/

 Do you have any idea on the 3D visualization aspect ? It is often a strong
 use
 case.

 Vincent

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Re: [Qgis-user] lidar visualization in qgis

[David Fawcett]

The issue with these tools is that (at least last time I looked), some of
these tools can't be used in government or commercial sectors without
additional licensing.  I wasn't able to use the tools via Processing
without obtaining a license from the creator.

http://www.cs.unc.edu/~isenburg/lastools/download/LICENSE.txt


On Tue, Mar 25, 2014 at 3:36 PM, Gino Pirelli lui...@gmail.com wrote:

 did you tried LASTools as qgis/processing tool?

 http://rapidlasso.com/






 On 25 March 2014 21:08, antonio valanzano anval...@gmail.com wrote:

 I would like to start a discussion about the minimal functionalities that
 a new lidar plugin or a  core function  should present.

 Based on my experience the minimal requirements are:

 - to read data in LAS format
 - to visualize points based on classification or intensity
 - to allow the filtering of points based on classification
 - to allow the selection of points with spatial relationship with other
 layers
 - to export filtered points or selected points in LAS format

 Antonio Valanzano





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[Qgis-user] lidar visualization in qgis

[antonio valanzano]

I would like to start a discussion about the minimal functionalities that a
new lidar plugin or a  core function  should present.

Based on my experience the minimal requirements are:

- to read data in LAS format
- to visualize points based on classification or intensity
- to allow the filtering of points based on classification
- to allow the selection of points with spatial relationship with other
layers
- to export filtered points or selected points in LAS format

Antonio Valanzano
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Re: [Qgis-user] lidar visualization in qgis

[Vincent Picavet]

Hello,

Le mardi 25 mars 2014 21:08:24, antonio valanzano a écrit :
 I would like to start a discussion about the minimal functionalities that a
 new lidar plugin or a  core function  should present.
 
 Based on my experience the minimal requirements are:
 
 - to read data in LAS format
 - to visualize points based on classification or intensity
 - to allow the filtering of points based on classification
 - to allow the selection of points with spatial relationship with other
 layers
 - to export filtered points or selected points in LAS format

+ PostgreSQL PointCloud support

Do you plan any PDAL and/or PCL integration into the core or Processing ? 
Maybe pointclouds is more for a second step with data processing capabilities.

http://www.pdal.io/
http://pointclouds.org/

Do you have any idea on the 3D visualization aspect ? It is often a strong use 
case.

Vincent
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Re: [Qgis-user] lidar visualization in qgis

[Larry Shaffer]

Hi Antonio,

You may wish to review this recent discussion on the developer mailing list
concerning how to best implement it [0]. I believe there may be a Google
Summer of Code project as well [1].

[0] http://osgeo-org.1560.x6.nabble.com/Lidar-data-into-QGIS-td5100547.html
[1]
http://hub.qgis.org/wiki/quantum-gis/Google_Summer_of_Code_2014#LiDAR-support-for-QGIS

Regards,

Larry Shaffer
Dakota Cartography
Black Hills, South Dakota


On Tue, Mar 25, 2014 at 2:08 PM, antonio valanzano anval...@gmail.comwrote:

 I would like to start a discussion about the minimal functionalities that
 a new lidar plugin or a  core function  should present.

 Based on my experience the minimal requirements are:

 - to read data in LAS format
 - to visualize points based on classification or intensity
 - to allow the filtering of points based on classification
 - to allow the selection of points with spatial relationship with other
 layers
 - to export filtered points or selected points in LAS format

 Antonio Valanzano





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Re: [Qgis-user] lidar visualization in qgis

[Gino Pirelli]

did you tried LASTools as qgis/processing tool?

http://rapidlasso.com/






On 25 March 2014 21:08, antonio valanzano anval...@gmail.com wrote:

 I would like to start a discussion about the minimal functionalities that
 a new lidar plugin or a  core function  should present.

 Based on my experience the minimal requirements are:

 - to read data in LAS format
 - to visualize points based on classification or intensity
 - to allow the filtering of points based on classification
 - to allow the selection of points with spatial relationship with other
 layers
 - to export filtered points or selected points in LAS format

 Antonio Valanzano





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Re: [Qgis-user] LIDAR and QGIS

[Matt Boyd]

It's probably not polite to hijack a thread but this seems to start to
look like something I'd use.

On Mon, Feb 25, 2013 at 8:08 AM, Stefan Keller sfkel...@gmail.com wrote:
edit..
 That's why a new data type pointcloud is needed.

more editing

 Thank for the information ! Adding that to the existing 3d capabilities of
 postgis would be a great thing. I hope that Paul will go beyond zlib for the
 compression.

I know that postgis recently(?) included / added in some 3D
capabilities, but I'm not sure what parts of QGIS are able to use
those. I didn't think that we'd reached 3D visualisation with QGIS
yet?

Matt
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Re: [Qgis-user] LIDAR and QGIS

[Vincent Picavet]

Hi,

  Thank for the information ! Adding that to the existing 3d capabilities
  of postgis would be a great thing. I hope that Paul will go beyond zlib
  for the compression.

I doubt about Paul reading this thread. Point cloud implementation is 
independant of 3D, and even of PostGIS for now. It is also really new.

 I know that postgis recently(?) included / added in some 3D
 capabilities, but I'm not sure what parts of QGIS are able to use
 those. I didn't think that we'd reached 3D visualisation with QGIS
 yet?

As for now, 3D in postgis only exists in a specific branch on git. It is not 
incorporated into postgis trunk. That will be subject to discussion at the 
next Boston code sprint in march.
As for QGIS support, it is highly experimental. We managed to get the globe 
plugin read 3D objects, but it required modification in the OsgEarth toolkit 
and the globe plugin itself. Patches have been sent upstream, but do not 
expect to find it working in any available binary qgis distribution.
And it needs a lot of work to get something really useful.

You will find some more infos and videos here :
https://github.com/Oslandia/presentations/tree/master/fosdem_2013

We are working hard on the subject, and no doubt at some point Paul's work on 
point cloud and 3D stuff will meet :)

Vincent
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[Qgis-user] LIDAR and QGIS

[Jake Maier]

Hi Everyone

Does anyone have experience with LIDAR and qgis, what do I need to display
LIDAR information within qgis?

I mean other than the 2 terabyte hard drive to obtain the information?

Or does anyone know if I can get LIDAR for Maine (USA) on the internet?

Thank you very much for any pointers.

Jake

 

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Re: [Qgis-user] LIDAR and QGIS

[Percy Langa]

On 2013/02/24 02:44 PM, Jake Maier wrote:


Hi Everyone

Does anyone have experience with LIDAR and qgis, what do I need to 
display LIDAR information within qgis?


I mean other than the 2 terabyte hard drive to obtain the information?

Or does anyone know if I can get LIDAR for Maine (USA) on the internet?

Thank you very much for any pointers.

Jake


Hi Jake,

Have a look at this:
- 
http://www.pushingthesensors.com/wp-content/uploads/2012/06/QGIS_GRASS-Lidar-Practical-2011.pdf

- http://grasswiki.osgeo.org/wiki/LIDAR

Cheers,
Percy
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Re: [Qgis-user] LIDAR and QGIS

[Johan Nilsson]

I think you need to install libLAS-bin (http://www.liblas.org/) to save it
as Geotiff or asci (xyz) values. Then I don't think QGIS can disply it in
3D? You maybe can do it i GRASS and  nviz, i think. The freeware Fugroview
are much quicker, I think. Fugroview works fine under wine.

Ubuntu have libLAS-bin in the repository as a cli-program.

If there are other ways, I really want to hear about them.

/Cheers




2013/2/24 Jake Maier j...@jmforestry.com

 Hi Everyone

 Does anyone have experience with LIDAR and qgis, what do I need to display
 LIDAR information within qgis?

 I mean other than the 2 terabyte hard drive to obtain the information?

 Or does anyone know if I can get LIDAR for Maine (USA) on the internet?***
 *

 Thank you very much for any pointers.

 Jake

 ** **

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Re: [Qgis-user] LIDAR and QGIS

[Stefan Keller]

Hi Jake

 2013/2/24 Jake Maier j...@jmforestry.com
(...)
 Does anyone have experience with LIDAR and qgis, what do I need to display
 LIDAR information within qgis?

The ultimate solution of course would be to integrate PostGIS in QGIS!
Paul seems to have got funded work on it [1].
How easy this new data type pointcloud integrates with QGIS I don't know yet.
I already asked him to report eventually on PostGIS dev or PostGIS
users mailing list.

Yours,
Stefan

[1] https://github.com/pramsey/pointcloud



2013/2/24 Johan Nilsson joni8...@gmail.com:
 I think you need to install libLAS-bin (http://www.liblas.org/) to save it
 as Geotiff or asci (xyz) values. Then I don't think QGIS can disply it in
 3D? You maybe can do it i GRASS and  nviz, i think. The freeware Fugroview
 are much quicker, I think. Fugroview works fine under wine.

 Ubuntu have libLAS-bin in the repository as a cli-program.

 If there are other ways, I really want to hear about them.

 /Cheers




 2013/2/24 Jake Maier j...@jmforestry.com

 Hi Everyone

 Does anyone have experience with LIDAR and qgis, what do I need to display
 LIDAR information within qgis?

 I mean other than the 2 terabyte hard drive to obtain the information?

 Or does anyone know if I can get LIDAR for Maine (USA) on the internet?

 Thank you very much for any pointers.

 Jake




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Re: [Qgis-user] LIDAR and QGIS

[MORREALE Jean Roc]

Le 24/02/2013 17:09, Stefan Keller a écrit :

Hi Jake


2013/2/24 Jake Maier j...@jmforestry.com

(...)

Does anyone have experience with LIDAR and qgis, what do I need to display
LIDAR information within qgis?


I use a mix of liblas/lastools to manage the data, GRASS and SAGA for 3D 
vizualisation and interpolation and QGIS for the daily tasks.


About QGIS/GRASS : don't even try to import or open all your dataset, 
work on subsets.



The ultimate solution of course would be to integrate PostGIS in QGIS!
Paul seems to have got funded work on it [1].
How easy this new data type pointcloud integrates with QGIS I don't know yet.
I already asked him to report eventually on PostGIS dev or PostGIS
users mailing list.

Yours,
Stefan

[1] https://github.com/pramsey/pointcloud


Thank for the information ! Adding that to the existing 3d capabilities 
of postgis would be a great thing. I hope that Paul will go beyond zlib 
for the compression.


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Re: [Qgis-user] LIDAR and QGIS

[Stefan Keller]

Hi Jean

2013/2/24 MORREALE Jean Roc jr.morre...@enoreth.net:
 I use a mix of liblas/lastools to manage the data, GRASS and SAGA for 3D
 vizualisation and interpolation and QGIS for the daily tasks.

I could wish, I would prefer a clean QGIS solutions (without
GRASS/SAGA dependencies) which uses a proper pointcloud data type
(here: from PostGIS).

 About QGIS/GRASS : don't even try to import or open all your dataset, work
 on subsets.

That's why a new data type pointcloud is needed.

 Thank for the information ! Adding that to the existing 3d capabilities of
 postgis would be a great thing. I hope that Paul will go beyond zlib for the
 compression.

Your're welcome.
I hope Paul reads this thread.

Yours, Stefan

2013/2/24 MORREALE Jean Roc jr.morre...@enoreth.net:
 Le 24/02/2013 17:09, Stefan Keller a écrit :

 Hi Jake

 2013/2/24 Jake Maier j...@jmforestry.com

 (...)

 Does anyone have experience with LIDAR and qgis, what do I need to
 display
 LIDAR information within qgis?


 I use a mix of liblas/lastools to manage the data, GRASS and SAGA for 3D
 vizualisation and interpolation and QGIS for the daily tasks.

 About QGIS/GRASS : don't even try to import or open all your dataset, work
 on subsets.


 The ultimate solution of course would be to integrate PostGIS in QGIS!
 Paul seems to have got funded work on it [1].
 How easy this new data type pointcloud integrates with QGIS I don't know
 yet.
 I already asked him to report eventually on PostGIS dev or PostGIS
 users mailing list.

 Yours,
 Stefan

 [1] https://github.com/pramsey/pointcloud


 Thank for the information ! Adding that to the existing 3d capabilities of
 postgis would be a great thing. I hope that Paul will go beyond zlib for the
 compression.


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