Garmin GB Discoverer v3.00 - National Parks 1:25K and National Trails 1:25K Collection

You can give your mapsets any name on these modern units.



Here are the two 25k img I created; all National Parks and National Trails.
As I described above those img only contain the 25k bitmaps, the autorouting (vector) layer, the 50k bitmap layer and the mdr.img are removed because they are already inside the Full 50k map of GB.

Important: it's essential that you use those two 25k maps in combination with the Full 50k map!
I've tested the combination of these 3 maps in Basecamp and on my 62s and everything works fine.

All GB Discoverer National Parks 25k joined in one img:

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All GB Discoverer National Trails 25k joined in one img:

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Hi,

Are National parks v2 or v3 ?

I suppose National trails are v2, because they don't exist in v3.

Please read my earlier posts .

Nice work !

But something strange occurs when I display maps on Montana :

When all maps are enabled, transition between 50 K and 25 K appears between 300 and 200 m. Up to now, all is normal.

But when only National Park is enabled (Topo Discoverer All UK 50 K and Topo Trails 25 K disabled), I can see the 50 K layer from 500 m to 300 m : or I should not because Topo Discoverer All UK 50 K is disabled and 50 K bitmap from National Park 25 K should have been removed. What's up ?

You are right, I just looked at it again (I made those maps almost 2 years ago) and I was wrong in stating I removed the 50k layer from the 25k maps! Actually it's impossible for me to remove this layer because after deleting the 67 vector maps (used for autorouting) and the mdr.img there is only one img left in the Parks- and Trail maps. It appears to be a 2 level map containing both 25k + 50k bitmaps.
When I made these joined maps I examined the single bimap img in Basecamp and only saw 25k scale bitmaps. Now that I looked again in Basecamp I found that when Basecamp is set to display at the highest level it only shows the 25k layer at all zoomlevels, only when you set detail to high or higer the 50k layer shows up when zooming out! :teeth:
It never struck my eye because I always have the full 50k map enabled because it covers the entire UK. The full 50k map also contains a basemap on a larger scale which becomes visible at 1.2km.

Conclusion: there still is some overlapping (Trails and Parks are overlapping too offcourse) data but I can't remove it ;-). I would advise to always enable the full 50k map because this map provides the 50k portion outside the Parks and trails, the search index, the basemap and the autorouting maps.

Anyway, your work is very useful because all three maps can be placed on a 8 Go micro SD, whereas I needed a 16 Go with original National Parks and Trails. :good:

Quote:

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Originally Posted by sergio2 [Only registered and activated users can see links. Click Here To Register...]

whereas I needed a 16 Go with original National Parks and Trails.

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You need more than 16GB, I estimate all maps together are around 20GB!
I also doubt if your GPS will read all 37 img on a 32GB card, my62s has a 16 map limit and the Oregon 600 has a 20 map limit. I have tested these limits with all different map-ID's (the UK maps have only 2 different map-ID's) but I wouldn't be surprised if your GPS doesn't read so many img.

Yes, you're right : Montana can only support 4000 mapping segments, and all maps located on a 32 Go micro SD won't be read on GPS.
16 Go seems to be the maximum size readable by Montana, but it depends on maps (and the number of their mapping segments).

There are 2 different limits, the amount of different mapsets (20 on the Oregon 600), and a map-segment limit of ~4000 for all loaded maps together.
The GB raster maps don't have much map-segments in total so that's no problem.
Your Montana can make use of 32GB cards in principle, it depends on the type of maps if you can fully load it with maps. My experience is that you'll reach the 20 map limit or the 4000 tile limit around 12GB so 16GB cards are the best choice. If you have a built in camera it's usefull to have larger cards offcourse.

I use a 64 Go filled with .jnx on my Montana : all .jnx are displayed.