[mkgmap-dev] overview2 branch

Wed May 29 08:05:15 BST 2013

Hi Steve,

Steve Ratcliffe wrote
> On 27/05/13 08:43, Gerd Petermann wrote:
>> @Steve: Is there a simple way to identify an img file that contains the
>> overview map?
> 
> I suspect that there should be, but we don't do anything special in any
> of the headers for an overview map as far as I recall. You can probably
> make a good guess since the first level of an overview map will normally
> be greater than 1.

well, the first level is also 0, but the high resolutions are probably
missing.
That should be good enough to issue a warning.
Seems the only special thing are the 0x4a polygons.

Gerd

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