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[mkgmap-dev] address search problem due to required "State" value

From Steve Ratcliffe steve at parabola.me.uk on Sun Sep 20 15:31:05 BST 2009


On 19/09/09 12:43, Johann Gail wrote:
> We have some basic knowledge of the format in the wiki. Has anyone tried
> to generate a mdr with the known sections and see what happens on
> mapsource or a gps unit.

Not as far as I know.  But why don't we just start.  I shall
kick things off by creating the main files required.

As there are a lot of different variations in the format, we should
concentrate on one of the smallest known variations.

It looks like you can create a file with only the
sections: 1, 4, 5, 6, 7, 11, 15.
I shall start off with a header size of 286.

MDR 1:  A reverse index from maps to the other sections.
MDR 4:  poi types, partially known
MDR 5:  Cities
MDR 6:  unknown, wiki claims it is a list of cities but I don't believe that
MDR 7:  Street names, optional as may be no streets
MDR 11: POI's
MDR 15: Strings

MDR 1 points to a subsidiary header for each map, there are at least
8 subsections in this header, some of which I partially understand
and I expect that all of them lead back into the other sections.

It might also be useful to try for the on-device format as that is a
smaller subset.


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