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Chap Pga I Map Plan and Chart
The Night Before
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6-inch plan angles anticyclone Ben Nevis blue Bonne Projection boundaries Britain cage centre chain Chapter chart colour printed compass contours convenient copper corner correct cover datum detail distance draw earth East Anglia edge edition England and Wales engraved equator feet folded geological give given gradient Greenwich meridian ground Gunter's chain hachures height hill features hill shading hydrographer important inch interested J-inch land latitude layer linen London London Traffic Area map projections margin mean sea level measured Mercator methods mile millibars mounted Mudge's maps names north and south Office old series ordnance maps Ordnance Survey orthomorphic perhaps photographic pins plane table plate plotted pole position projection record revision road Scotland sheet lines shown slope sort standard parallel straight stream surface surveyor theodolite town triangles vertical interval warm front whilst wind yards zinc zincography