[Qgis-user] How-to-Batch_convert the Spatial resolution of a set of >100 Geotiff files from 500m to 1000m

Tue May 31 12:48:57 PDT 2022

I'm pretty sure 3.18 had Batch processing - but I do concur with Nicolas 
- check and make sure that works on windows 7.

Right click on that processing tool and see if you have a batch option.

On 5/31/22 15:42, Nicolas Cadieux wrote:
> Hi,
>
> I think you need a 64bit version of Windows…. Make sure it’s 
> compatible with Windows 7.  You may need Windows 10 because of the 
> latest versions of Python…
>
> Nicolas Cadieux
> https://gitlab.com/njacadieux
>
>> Le 31 mai 2022 à 15:38, Amal Kar via Qgis-user 
>> <qgis-user at lists.osgeo.org> a écrit :
>>
>> 
>> THANK YOU VERY MUCH, SIR!
>> I shall first replace my present QGIS software (ver. 3.18.2, Zurich) 
>> with  the new one (ver. 3.24), and then use the procedure for batch 
>> processing.
>> Hope the new version runs on my old Windows 7.
>> Thanks again for the tips.
>> Regards,
>> amal kar.
>> -- -----------------------------
>>
>> On Tue, 31 May 2022 at 21:28, Randal Hale 
>> <rjhale at northrivergeographic.com> wrote:
>>
>>     Depending on which version of QGIS you have (3.22, 3.24  - you
>>     can select the "translate" command in the processing toolbox
>>     (you'll find that under gdal -> raster conversion) and either
>>     right click the tool and run as batch process or in 3.24 you can
>>     select the batch button from the translate menu.
>>
>>     You can grab all the imagery from a directory and convert it. I
>>     will admit that batch processing does throw me off just a bit -
>>     BUT - work with it and it should do what you want.
>>
>>     Randy
>>
>>     On 5/31/22 11:28, Amal Kar via Qgis-user wrote:
>>>     Hello,
>>>     I am new to QGIS.
>>>     Recently i downloaded a set of MODIS Terra surface reflectance
>>>     Daily data for a fixed rectangular area of my interest (118
>>>     daily files for each of the bands 1-4 and for years 2000-2020),
>>>     using the AppEEARS tool (NASA-USGS-LP DAAC) in geotiff format
>>>     (WGS 84; LatLong).
>>>     I wanted to convert the original data in 500 m spatial resolution
>>>     (0.0041667 arc deg; 2985 col x 1671 row for each scene) to 1 km
>>>     resolution (0.00833333 arc deg; 1493 col x 836 row), so that i
>>>     am able to create Max.value (& Min. value) Composites (MVCs) for
>>>     consecutive 8-Day periods at 1 km resolution and then analyse
>>>     the data sets for matching with other 8-Day data series
>>>     available  at 1 km resolution from Modis Terra sites.
>>>     No downloaded data from AppEEARS is automatically 'imported" to
>>>     my Idrisi software (neither geotiff, nor netCDF; same is the
>>>     case with my GlobalMapper 8.0 software also; the same formats
>>>     from other sites get converted easily). The file format could be
>>>     read in my QGIS Desktop software (ver. 3.18.2; Zurich), and then
>>>     exported either in geotiff or other formats (incl. idrisi) in
>>>     whatever resolution, etc., i chose.
>>>     Although i am doing it file by file, this is a huge
>>>     back-breaking pre-processing task.
>>>     I was thinking if there is any tool in QGIS for automatic batch
>>>     processing of the data (say, 50 or 100 at one time, once i
>>>     select the "Raster datasets" and  "add" them in the given Box
>>>     under "Data Source Manager"). Presently, after adding the
>>>     datafiles, i have to select one raster image at a time and
>>>     "Export" it with the desired resolution/ file format, etc. It
>>>     helps if i am able to select all the files together, give one
>>>     output resolution value and one desired file format for all the
>>>     files to be processed). It also helps if the output data file
>>>     uses the same name as given for the input file, but allows the
>>>     user to provide a short prefix to each of them (say 4-6 letters,
>>>     either replacing the first 4-6 ones, or adding to the given names).
>>>     Once i am able to pre-process the data quickly, i am thinking of
>>>     trying my QGIS for cloud removal (by providing a zero, No Data
>>>     value to the cloud pixels) and then try it for getting MVCs for
>>>     consecutive 8-day periods.
>>>     Thanks for your patience, and kind regards,
>>>     amal kar.
>>>
>>>     -- 
>>>     Dr. Amal Kar
>>>     Former Principal Scientist and Head, Division of Natural
>>>     Resources & Environment,
>>>     Central Arid Zone Research Institute, Jodhpur 342003, India
>>>     A-1/6, Baitalik Housing Society, KMDA Housing Complex,
>>>     Baghajatin (Near Hiland Park),
>>>     KOLKATA 700 094, India
>>>     Email: akarcaz50 at gmail.com
>>>
>>>
>>>
>>>     _______________________________________________
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>>>     Qgis-user at lists.osgeo.org
>>>     List info:https://lists.osgeo.org/mailman/listinfo/qgis-user
>>>     Unsubscribe:https://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>>     -- 
>>     -------------------------------------
>>     Randal Hale
>>     rjhale at northrivergeographic.com
>>     https://www.northrivergeographic.com
>>
>>
>>
>> -- 
>> Dr. Amal Kar
>> Former Principal Scientist and Head, Division of Natural Resources & 
>> Environment,
>> Central Arid Zone Research Institute, Jodhpur 342003, India
>> A-1/6, Baitalik Housing Society, KMDA Housing Complex,
>> Baghajatin (Near Hiland Park),
>> KOLKATA 700 094, India
>> Email: akarcaz50 at gmail.com
>>
>>
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-- 
-------------------------------------
Randal Hale
rjhale at northrivergeographic.com
https://www.northrivergeographic.com
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