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WORKING WITH MAPS
LOOKING AT MAPS
Fig PAGE 76 Twinlobed glacial moraine blocking the mouth of part of the Dora Baltea valley
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accurate air photographs alignment angle appear bearing block diagram boundaries Britain British camera cartographic centimetres chapter coastline colour construction contours Crown copyright reserved described detail distance drainage drawing drawn edition enlargement errors example Georef give Gough Map grid lines grid reference hachures height distortion hill horizontal important inch indicate intersection Istituto Geografico Militare land landscape latitude and longitude length main roads map projections map series map users marked measured meridians method mile National Grid normal nucleation oblique obvious Ordnance Survey Ordnance Survey map original orthomorphic parish plate position principal point printing produced Ptolemy's world map radial railways rectangular relatively relief revision rhumb line river route scale factor scale line scale maps settlement pattern Sewstern shape sheet lines shown in Fig slope square straight lines strip surface tilt distortion tion topographical maps towns triangulation units usually valley