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[mkgmap-dev] type numbers , again...

From Steve Ratcliffe steve at parabola.me.uk on Wed Sep 24 10:38:27 BST 2014

On 24/09/14 07:31, nwillink wrote:
> To me this is what I expected looking at various NT imgs.
> It might mean that POIs do have a maximum of 1FF only if 7th bit of subtype
> is not set?

I don't know much about extended types.  The mkgmap code says this for
extended points:

* type is written first, then subtype.
* type has no flags so its possible range is 0x0 to 0xff
* subtype has two flags:
   * 0x20 - has a label
   * 0x80 - has extra bytes after the label (describes marine buoy 
lights etc)
   so the possible subtype range is 0-0x1f (as expected)
* There are no flags on LBL offset.

Of course there may be other flags we don't know about and
the possible range may not be fully utilised by any device.


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