Re: [gdal-dev] Utilizing GDAL for adding overviews layer in python language

[Idan Miara via gdal-dev]

Hi,

You could use gdal to write a single tiff file from each numpy array layer
and name it accordingly:
base.tif - your input tiff file
base.tif.ovr - first overview
base.tif.ovr.ovr - second overview
base.tif.ovr.ovr.ovr - third overview
etc.

gdal would know to read these overviews automatically, but if you want you
can also transform base.tif (along with its new overviews) into a single
tif file with internal overviews (a COG could be a good choice).

There might be a way to write them all together into a single tiff in one
go without using intermediate single overview per layer files, but I'm not
sure how.


On Tue, 12 Mar 2024 at 10:28, Pradeep Mahato  wrote:

> Hi Idan,
>  We are using CuPy and CuCim to generate the pyramid layers, these
> layers are in numpy array format (LxWxHxC). Here L is number of pyramid
> layer and HxWxC is image in numpy array. Problem we are facing is that how
> to combine/stack these pyramid layers in one tiff file using GDAL.
>
> Thanks and Regards,
> Pradeep Kumar Mahato
> Phone: 080-2504 9199/ +91 8762020114
>
> --
> *From: *i...@miara.com
> *To: *"Pradeep Mahato" 
> *Cc: *gdal-dev@lists.osgeo.org
> *Sent: *Tuesday, March 12, 2024 12:41:25 PM
> *Subject: *Re: [gdal-dev] Utilizing GDAL for adding overviews layer in
> python language
>
> Hi,
>
> So you are saying that you used gdal buildoverview in Python to add
> overviews to the tiff file but it only uses CPU and not GPU.
> And you could use the other library to add overviews using GPU - can you
> share which library you used or what's the output format that you got?
> Maybe you can combine the output of the other library into the tiff file
> using gdal in Python.
>
> Kind regards,
> Idan
>
>
> On Tue, 12 Mar 2024, 09:02 Pradeep Mahato via gdal-dev, <
> gdal-dev@lists.osgeo.org> wrote:
>
>> Dear Team,
>> We are working on a project with Geo-spatial images using python
>> language for our development purpose. To visualize the images properly
>> pyramid layer is necessary. GDAL buildoverview functionality of python, we
>> are using to generate the overview but it is utilizing only the CPU. We are
>> able to generate the pyramid layer using other python library utilizing the
>> GPU but not able to add this pyramid layer into the geospatial images of
>> *".tiff"* file format as overview layer.
>>
>> Please help us in this regards if any GDAL function is there to add the
>> pyramid as overview layer.
>>
>> Thanks and Regards,
>> Pradeep Kumar Mahato
>> Phone: 080-2504 9199/ +91 8762020114
>>
>>
>>
>> <https://amritmahotsav.nic.in/>
>>
>> ___
>> gdal-dev mailing list
>> gdal-dev@lists.osgeo.org
>> https://lists.osgeo.org/mailman/listinfo/gdal-dev
>>
>
>
>
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Re: [gdal-dev] Utilizing GDAL for adding overviews layer in python language

[Rahkonen Jukka via gdal-dev]

Hi,

External overviews that gdaladdo creates when the -ro option is used are TIFF 
files with a file name extension .ovr. If you can create similar TIFFs with the 
other library and name them as .ovr then GDAL should use them automatically.

-Jukka Rahkonen-

Lähettäjä: gdal-dev  Puolesta Pradeep Mahato 
via gdal-dev
Lähetetty: tiistai 12. maaliskuuta 2024 9.00
Vastaanottaja: gdal-dev@lists.osgeo.org
Aihe: [gdal-dev] Utilizing GDAL for adding overviews layer in python language

Dear Team,
We are working on a project with Geo-spatial images using python language 
for our development purpose. To visualize the images properly pyramid layer is 
necessary. GDAL buildoverview functionality of python, we are using to generate 
the overview but it is utilizing only the CPU. We are able to generate the 
pyramid layer using other python library utilizing the GPU but not able to add 
this pyramid layer into the geospatial images of ".tiff" file format as 
overview layer.

Please help us in this regards if any GDAL function is there to add the pyramid 
as overview layer.

Thanks and Regards,
Pradeep Kumar Mahato
Phone: 080-2504 9199/ +91 8762020114



[https://email.gov.in/videos/images/75.jpg]<https://amritmahotsav.nic.in/>

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Re: [gdal-dev] Utilizing GDAL for adding overviews layer in python language

[Idan Miara via gdal-dev]

Hi,

So you are saying that you used gdal buildoverview in Python to add
overviews to the tiff file but it only uses CPU and not GPU.
And you could use the other library to add overviews using GPU - can you
share which library you used or what's the output format that you got?
Maybe you can combine the output of the other library into the tiff file
using gdal in Python.

Kind regards,
Idan


On Tue, 12 Mar 2024, 09:02 Pradeep Mahato via gdal-dev, <
gdal-dev@lists.osgeo.org> wrote:

> Dear Team,
> We are working on a project with Geo-spatial images using python
> language for our development purpose. To visualize the images properly
> pyramid layer is necessary. GDAL buildoverview functionality of python, we
> are using to generate the overview but it is utilizing only the CPU. We are
> able to generate the pyramid layer using other python library utilizing the
> GPU but not able to add this pyramid layer into the geospatial images of
> *".tiff"* file format as overview layer.
>
> Please help us in this regards if any GDAL function is there to add the
> pyramid as overview layer.
>
> Thanks and Regards,
> Pradeep Kumar Mahato
> Phone: 080-2504 9199/ +91 8762020114
>
>
>
> 
>
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> gdal-dev@lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/gdal-dev
>
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[gdal-dev] Utilizing GDAL for adding overviews layer in python language

[Pradeep Mahato via gdal-dev]

Dear Team, 
We are working on a project with Geo-spatial images using python language for 
our development purpose. To visualize the images properly pyramid layer is 
necessary. GDAL buildoverview functionality of python, we are using to generate 
the overview but it is utilizing only the CPU. We are able to generate the 
pyramid layer using other python library utilizing the GPU but not able to add 
this pyramid layer into the geospatial images of ".tiff" file format as 
overview layer. 

Please help us in this regards if any GDAL function is there to add the pyramid 
as overview layer. 

Thanks and Regards, 
Pradeep Kumar Mahato 
Phone: 080-2504 9199/ +91 8762020114 



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