Base Camp and Mapsource, need another typ file than 34xx needs.... Thats why you see that blank lines inside tiles...
If you put Garmin at USB and try to see map from GPS, you will see that you show me....
But if you have install map at Mapsource (with right typ file for Mapsource) you will see something like that: (don't give attention at 3D view, I have join Anavasi with DEM map at Gmaptool for better view at Mapsource)
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And that is what I see when I put my Nuvi 1490 at basecamp: (as you can see, from Nuvi I can see only roadmap)
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