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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">One solution is to use Warp, found under
<b>Raster</b> </span><span style="font-size:11.0pt;font-family:Wingdings;color:#1F497D;mso-fareast-language:EN-US">à</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">
<b>Projections </b></span><span style="font-size:11.0pt;font-family:Wingdings;color:#1F497D;mso-fareast-language:EN-US">à</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">
<b>Warp (reproject)<o:p></o:p></b></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">This will allow you to specify a resolution and also change the file type.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Kind Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><br>
Richard<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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——</span><br>
<span style="FONT-FAMILY: Arial, sans-serif; FONT-WEIGHT: bold; COLOR: #004d44">Richard McDonnell MSc GIS, FME Certified Professional</span><br>
<span style="FONT-FAMILY: Arial, sans-serif; COLOR: #004d44"><i>FRM Data Management</i></span><br>
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</span><br>
<span style="FONT-FAMILY: Arial, sans-serif; COLOR: #565148">Jonathan Swift Street, Trim, Co Meath, C15 NX36</span><br>
<span style="FONT-FAMILY: Arial, sans-serif; COLOR: #565148">——</span><br>
<span style="FONT-FAMILY: Arial, sans-serif; COLOR: #565148">M +353 87 688 5964 T +353 46 942 2409</span><br>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> QGIS-User <qgis-user-bounces@lists.osgeo.org>
<b>On Behalf Of </b>Amal Kar via QGIS-User<br>
<b>Sent:</b> 11 January 2024 08:16<br>
<b>To:</b> qgis-user@lists.osgeo.org<br>
<b>Subject:</b> [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.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">Dear Community Members,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">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. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">I<span class="gmaildefault"> 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".
</span></span><o:p></o:p></p>
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<p class="MsoNormal"><span class="gmaildefault"><span style="font-family:"Georgia",serif">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 </span></span><span style="font-family:"Georgia",serif">width & height of 0.008333333 arc degrees<span class="gmaildefault"> for the desired 1-km pixels).</span></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">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).<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">Thanking You for Your patience, and with Kind Regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">amal kar.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Georgia",serif">-- ------ ------------------<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span class="gmailsignatureprefix">-- </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:blue">Dr. Amal Kar</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#660000;background:white">Former Principal Scientist and Head, Division of Natural Resources & Environment,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#660000;background:white">Central Arid Zone Research Institute, Jodhpur 342003, India</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:blue">A-1/6, Baitalik Housing Society, KMDA Housing Complex,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:blue">Baghajatin (Near Hiland Park),</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:blue">KOLKATA 700 094, India</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:blue">Email: <a href="mailto:akarcaz50@gmail.com" target="_blank">
akarcaz50@gmail.com</a></span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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