Hi everyone,
I have a very large dataset made up of numerous GeoTIFFs that I need to merge using FME’s RasterMosaicker. Unfortunately, the process stops due to memory issues, most likely because of the amount of data being processed.
What’s the best way to get around this limitation and still perform the mosaic?
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This one is a tricky one to process with FME is my experience. You could use a SSD drive as storage for your input files. That will do part of the job. Furthermore make sure you got enough RAM, something like 24 or 32 GB. And obviously switch off Feature Caching while running your FME workspace.
How much GB of input files do you need to process?
A useful approach could be to mosaic just 2 or 3 images first. Onces you have optimized that process increase the number of input files to your total amount of input files.
I have 40 GB of data with 3553 images. How can I switch off feature caching?
Hi
You can toggle on/off feature (data) caching by checking Workbench Menu: Run > Enable Feature Caching in FME 2025.0 and earlier, Enable Data Caching in FME 2025.1+.
See these documents to learn more.
About Feature Inspection - FME 2025.0 and earlier