27px, we want 27. Please register or login . The agonic line is east of Oregon by about 20 degrees, so we say that the declination for Oregon is 20 degrees east.
East declination is measured clockwise from true north.
So to get a true reading of north, then, you'll have to subtract 20 degrees from your bearing. In northern Maine, the declination is about 20 degrees west, so you'll have to add 20 degrees to the compass reading. Click here to find out how. Copyright Rodale, Inc. 2001.