Hi Thorsten I've noticed that pois are only searchable in mapsource if they appear in the mdr.img file. The categories are directly linked to the occurence of a poi type in the mdr subfile. This may not be what you are looking for but I'm examining the mdr structure myself and have written a small binary tool to extract the pois ( not addresses); it only reads NT and non NT mdr.img files. http://www.pinns.co.uk/osm/bits/mdr_pois.zip Interestingly, a) TOPOs only seem to include pois with 1400+ range b) There is another byte attached to each indexed poi - mkgmap seems to set it to 0 - No idea what it does but I have seen values 1-16 elsewhere. Nick

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