Geographic Information Systems Asked by MapinTX on January 1, 2021
I need to compress the file sizes of GeoTIFFs that are created when running the MapBasic application. In a .Net application, I transform the GeoTIFF into a compressed JPG using ImageMagick; which works perfectly. However, the original GeoTIFFs are required for sharing and download. Adding to the difficulty is that the existing resolution and dimensions must be maintained. I am trying to perform the compression within MapBasic so that an additional application just to compress the GeoTIFFs will not need to be created.
Here is a sample of the current code:
Save Window windowId As reportPath & imgFileName & ".tif" Type "GEOTIFF" Width 7.49826 Units "in" Height 9.5816 Unites "in" Resolution 1152
Can you call batch files from MapBasic? I compress GeoTIFFs externally, using a command like the following: gdal_translate -co COMPRESS=JPEG -co JPEG_QUALITY=%QUALITY% -co PHOTOMETRIC=YCBCR -co TILED=YES You need input & output filenames/paths after that, which I don't show here. %QUALITY% is a variable I set up earlier, use from 75 to 100. I'm using the gdal_translate that comes with QGIS.
Answered by rossnixon on January 1, 2021
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