No I don't think you know what I want. Right now mkgmap sets the value to 0xc, but I think it has to be 0xd. It is definitely fixed somewhere and has implications on routing. However it seems to me that the actual number does not matter, however it matters whether the number is even or uneven. It is in gmaptool (using experimental options) the fourth value, but I have no clue at all where it is hardcoded in mkgmap.
As I said the 0xc value is not hardcoded in mkgmap, but contained in the LocatorConfig.xml file. In fact we do know some of the bits in the value: 0x8 is to show zip before city in POI address 0x4 is to show street name before street number 0x2 is for transparency, but that is handled elsewhere 0x1 is the bit you are interested in finding the meaning of. Unless it happens to control something that varies from country to country, it would of course be sensible to set it within mkgmap separately from the LocatorConfig.xml file, just like the transparent bit is now. ..Steve