My experience here with 1:250k maps is .. they are fairly good when you consider the resolution of the paper map it self. Around 200 metres max 'error' but typically better than that.
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Point 1
Do remember you are dealing with a paper map maker who knew it was going onto paper .. so did not expect it to go on a GPS system .. so if they wanted to display 2 buildings at location Z .. but there was not room to display them at that scale .. they simply placed them at z-1 and z+1 .. so both are 'there' and you can see them .. even if they are not at the absolutely correct place.
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Point 2
These are 1984 or there abouts date wise .. some things do change .. even in Africa.
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Madmappers have the russian maps with the Oziexplorer files .. in ecw format so they go straight on a PDA .. they'll even sell you a CD with them on it to save downloading fees.
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Regards Frank Warner
motorcycles BMW R80 G/S 1981, BMW K11LT 1993, BMW K75 G/S
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