[Qgis-user] Amal Kar - India - Batch conversion of files for raster layer format from geotiff to idrisi, and simultaneously from a higher pixel resolution to a lower one.

[Richard McDonnell]

Hi,
One solution is to use Warp, found under Raster --> Projections --> Warp (reproject)
This will allow you to specify a resolution and also change the file type.
Kind Regards,

Richard


——
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management

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Oifig na nOibreacha Poiblí
Office of Public Works

Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
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——
MSc GIS, FME Certified Professional

——
Oifig na nOibreacha Poiblí
Office of Public Works

Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
——
M +353 87 688 5964 T +353 46 942 2409
https://https://gov.ie/opw<https://www.opw.ie>

——
Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/>
From: QGIS-User <qgis-user-bounces at lists.osgeo.org> On Behalf Of Amal Kar via QGIS-User
Sent: 11 January 2024 08:16
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] Amal Kar - India - Batch conversion of files for raster layer format from geotiff to idrisi, and simultaneously from a higher pixel resolution to a lower one.

Dear Community Members,
I am currently trying to make use of a series of Raster data files from Modis satellite sensors that are available in Geotiff format (.tif) and in the pixel resolution of 500-m.
I downloaded the files from a USGS website, and wanted to convert each file into an Idrisi raster format (16 bit integer elevation data in .RST & .RDC files), and in 1-km pixel resolution.
I am using the batch convert utility in my QGIS (ver. 3.18; Zurich) within the GDAL Toolbox, especially its "Translate (Convert Format)" utility under "Raster Conversion".
While this utility converts all the files from .tif to .rst & .rdc very quickly and accurately, it does not have any scope of changing the pixel resolution (i.e., from pixel width & height of 0.00417 arc degrees for 500 m pixels to the width & height of 0.008333333 arc degrees for the desired 1-km pixels).
When i do the conversion of files individually by opening each .tif raster file and then exporting each ("Save as") to idrisi format, it opens a new window of "Save Raster Layer as....", where the options are for changing the "Resolution", both horizontal and vertical.
However, changing each data file through this process, especially when i am dealing with a few hundreds of daily satellite data files, is very cumbersome. There must be some clickable tool  hidden within the Tool Box, which i am too naive to understand and pick up (i am NOT computer-savvy, although i use it more often for digital analysis of my earth surface data in GIS).
I shall be highly grateful if you can lead me to the appropriate tool in my  QGIS (ver. 3.18; Zurich), which can be easily followed.
Thanking You for Your patience, and with Kind Regards,
amal kar.
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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<mailto:akarcaz50 at gmail.com>


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