Thread: Garmin GB Discoverer 50K All v4

Interesting, the size of this map has been reduced from 3.06 GB (v3) to 2.28 GB (v4).
The rastermap version of Topo Switzerland v4 was reduced too, resulting in a rastermap with a much lower resolution than v3!
Time to do some tests...

I compared v4 against v3 and as expected: jpeg-compression is much higher in v4

V3
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v4
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I don't understand this trend to lower raster-map resolutions whereas the accepted SD cards are getting larger !?