We edited E141S002 a few days ago.
Your image of 'wandering pixels' is to small to see any detail.
Only time I've seen that is when one does not remove the header when exported from the ZHF file. No need to do that if exported directly from the BFD file.
It may be possible to edit the TerrainMapPS.fx and TerrainMapVS.fx Shader files to change how the Navigation map appears in Game.
I removed both as a test and lost all land masses!
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