Raster Format Conversion Using gdal translate: Difference between revisions

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This page lists useful batch file examples for using gdal_translate.exe. For complete documentation on this tool please visit '''<u>[https://gdal.org/programs/gdal_translate.html#gdal-translate gdal.org/programs/gdal_translate]</u>'''<Br>
This page lists useful batch file examples for using gdal_translate.exe. For complete documentation on this tool please visit '''<u>[https://gdal.org/programs/gdal_translate.html#gdal-translate gdal.org/programs/gdal_translate]</u>'''<Br>


==Basic Format Conversion===
==Basic Format Conversion==
Format conversion can be done using "<tt>-of <format_name></tt>" then specifying the "<tt><source_dataset> <destination_dataset></tt>".<br>
Format conversion can be done using "<tt>-of <format_name></tt>" then specifying the "<tt><source_dataset> <destination_dataset></tt>".<br>
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<pre>gdal_translate.exe -of GPKG DEM_M01_5m.asc DEM_M01_5m.gpkg</pre>
<pre>gdal_translate.exe -of GPKG DEM_M01_5m.asc DEM_M01_5m.gpkg</pre>
'''GeoTIFF to ASC'''<br>
'''GeoTIFF to ASC'''<br>
:* ''<tt>-co</tt>'': (Creation Option) - output format specific option
:* ''<tt>-co</tt>'': (Creation Option) - output format specific option. Flag must be used for eachcreation option used. - '''<u>[https://gdal.org/drivers/raster/aaigrid.html More Details]</u>'''
:** ''<tt>SIGNIFICANT_DIGITS=<n></tt>'': limits the precision of the output
:** ''<tt>SIGNIFICANT_DIGITS=<n></tt>'': limits the precision of the output
<pre>gdal_translate.exe -of AAIGrid -co SIGNIFICANT_DIGITS=8 DEM_M01_5m.tif DEM_M01_5m.asc</pre>
<pre>gdal_translate.exe -of AAIGrid -co SIGNIFICANT_DIGITS=8 DEM_M01_5m.tif DEM_M01_5m.asc</pre>

==Adding Compression to GeoTIFF==
<Br>
'''Using DEFLATE Compression on Output GeoTIFF'''
:* ''<tt>-co</tt>'': (Creation Option) - output format specific option. Flag must be used for each creation option used -'''<u>[https://gdal.org/drivers/raster/gtiff.html More Details]</u>'''
:** ''<tt>COMPRESS=<method></tt>: "NONE", "DEFLATE", "LZW", and "PACKBITS" are currently supported by TUFLOW
<pre>gdal_translate.exe -of GTiff -co COMPRESS=DEFLATE DEM_M01_5m.asc DEM_M01_5m.tif</pre>
'''Specifying the Compression Level for the DEFLATE Compression Method'''<br>
:* ''<tt>-co</tt>'': (Creation Option) - output format specific option. Flag must be used for each creation option used -'''<u>[https://gdal.org/drivers/raster/gtiff.html More Details]</u>'''
:** ''<tt>ZLEVEL=[1-9]</tt>
<pre>gdal_translate.exe -of GTiff -co COMPRESS=DEFLATE -co ZLEVEL=9 DEM_M01_5m.asc DEM_M01_5m.tif</pre>
'''Adding a Horizontal Predictor to the Compression'''<br>
:* ''<tt>-co</tt>'': (Creation Option) - output format specific option. Flag must be used for each creation option used -'''<u>[https://gdal.org/drivers/raster/gtiff.html More Details]</u>'''
:** ''<tt>PREDICTOR=[1/2/3]</tt>'': 1 (No Predictor) and 2 (Horizontal Predictor) currently supported by TUFLOW
<pre>gdal_translate.exe -of GTiff -co COMPRESS=DEFLATE -co ZLEVEL=9 -co PREDICTOR=2 DEM_M01_5m.asc DEM_M01_5m.tif</pre>

Revision as of 23:00, 11 April 2022

This page lists useful batch file examples for using gdal_translate.exe. For complete documentation on this tool please visit gdal.org/programs/gdal_translate

Basic Format Conversion

Format conversion can be done using "-of <format_name>" then specifying the "<source_dataset> <destination_dataset>".

ASC to GeoTIFF

gdal_translate.exe -of GTiff DEM_M01_5m.asc DEM_M01_5m.tif

ASC to GPKG

gdal_translate.exe -of GPKG DEM_M01_5m.asc DEM_M01_5m.gpkg

GeoTIFF to ASC

  • -co: (Creation Option) - output format specific option. Flag must be used for eachcreation option used. - More Details
    • SIGNIFICANT_DIGITS=<n>: limits the precision of the output
gdal_translate.exe -of AAIGrid -co SIGNIFICANT_DIGITS=8 DEM_M01_5m.tif DEM_M01_5m.asc

Adding Compression to GeoTIFF


Using DEFLATE Compression on Output GeoTIFF

  • -co: (Creation Option) - output format specific option. Flag must be used for each creation option used -More Details
    • COMPRESS=<method>: "NONE", "DEFLATE", "LZW", and "PACKBITS" are currently supported by TUFLOW
gdal_translate.exe -of GTiff -co COMPRESS=DEFLATE DEM_M01_5m.asc DEM_M01_5m.tif

Specifying the Compression Level for the DEFLATE Compression Method

  • -co: (Creation Option) - output format specific option. Flag must be used for each creation option used -More Details
    • ZLEVEL=[1-9]
gdal_translate.exe -of GTiff -co COMPRESS=DEFLATE -co ZLEVEL=9 DEM_M01_5m.asc DEM_M01_5m.tif

Adding a Horizontal Predictor to the Compression

  • -co: (Creation Option) - output format specific option. Flag must be used for each creation option used -More Details
    • PREDICTOR=[1/2/3]: 1 (No Predictor) and 2 (Horizontal Predictor) currently supported by TUFLOW
gdal_translate.exe -of GTiff -co COMPRESS=DEFLATE -co ZLEVEL=9 -co PREDICTOR=2 DEM_M01_5m.asc DEM_M01_5m.tif
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