I’ve used a 8192×4096 TIF and PNG earth surface map on a 2.0Ghz Dual-Core G5 PowerMac with 4GB of RAM without issues.
NASA should have one available for download on its Visible Earth site.
https://visibleearth.nasa.gov/
I once tried playing with a 21601×10801 map but got similar errors.
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H. Keith Hamilton
Fellowship Bible Church (Day Job)
Fallen Dragon Studios (Freelance)
kham4002@mac.com