On Fri, Aug 28, 2009 at 03:45:28PM +0100, Steve Hosgood wrote:
Detectives wanted!
Some or maybe all of the global index is in the .MDR file. Information on the this file is starting to appear on:
http://wiki.openstreetmap.org/wiki/OSM_Map_On_Garmin/MDR_Subfile_Format
There's a global sorted city-list appearing in the MDR5 and MDR6 sections.
Great chunks of tables containing short bits of plaintext strings can be seen in MDR30/31 and MDR32/33, but as yet no tables have been found which glues those bits together to form postcodes, addresses or city-names. Contributors familiar with text-compression systems would be very welcome to look over it.
You can rip an .MDR file out of an official Garmin .IMG (it isn't encrypted as such).
More eyes on the job will increase the chance that someone gets lucky and spots crucial clues into how it all works. Join in please!
Is there any way of creating an MDR file ourselves? I mean probably with commercial software? It might be interesting to have an MDR with a single adresse, 2 adresses same city, 2 adresses samt street+city etc ... Guessing by difference is more efficient than to wade through half a gigabyte of data in an unknown format. Flo -- Florian Lohoff flo@rfc822.org "Es ist ein grobes Missverständnis und eine Fehlwahrnehmung, dem Staat im Internet Zensur- und Überwachungsabsichten zu unterstellen." - - Bundesminister Dr. Wolfgang Schäuble -- 10. Juli in Berlin