Propeller's standard GeoTIFF orthophoto files use JPEG compression within the TIFF file for maximum quality and minimum file size. However, AutoDesk doesn't let you open JPEG-compressed TIFFs.
If you need a JPEG file, you can convert from the TIFF to a geolocated JPEG file with the instructions below. Alternatively, you can convert the JPEG-compressed TIFF file to a standard uncompressed TIFF.
Size warning for uncompressed TIFF: these files can get very large—they are likely to at least double in size after conversion.
Resolution warning for JPEG: Note that the JPEG file standard only allows images to have a maximum height or width of 65,535 pixels, so the conversion process may end up reducing the resolution of your image.
To create a JPEG file:
- Install GDAL for your operating system.
- Open Command Prompt (Windows) or Terminal (Mac) to run GDAL commands.
- Run the following command:
Note the space between input and output location
This command creates a file in the specified output format ('-of') of JPEG. It adds the conversion option ('-co') to create a matching WORLDFILE that geolocates the image (it will be a .wld file; other packages create a .jgw file).
Then specify the location of the file we want to convert and follow that with the location of where you want to put the output JPEG (.wld file will be put in the same directory).
You can zip the .jpg and .wld files together and upload back to your portal to share this file via Propeller.
To create an uncompressed TIFF file
The steps are the same as the above, but with this command instead (to specify the GTIFF format):
I still can't do it!
The Propeller data specialists team can help you generate custom files and outputs at an hourly consulting rate. Let us know if you need our help in a pinch and we'll do our best to get your data to you quickly - you can email firstname.lastname@example.org or talk with us right now from the chat bubble.