On Mon, 2009-08-31 at 14:05 +0100, Nick Austin wrote: > Whenever I'm mapping and cycle under a power line I take waypoint and > an approximate compass bearing. That way I can check that the NPE > information is correct (and align it more precisely). If the line is > missing from NPE I use the compass information to draw short 'stubs' > (about 1/4 mile long) either side of the road or path. Once there are > enough stubs in the same area these can be joined together to form > long lines.
I hope you're using a GPS or gyroscopic compass for that, I've had horrible luck with magnetic compasses near high-voltage lines.
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