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Geography / Leica / Geographic data and information / Geomatics / Civil engineering / Surveying / Geodesy / Satellite navigation systems / Bwlch / Leica Camera / Global Positioning System / Levelling


Survey of Cefn Perfa 13 March 2014 The Team: John Barnard and Myrddyn Phillips 1) Introduction Cefn Perfa (Hill Number 15004, Section 31B, OS 1:50000 Map 148, OS 1:25000 Map 200E, Grid Ref. SO173579) is listed as a P30 h
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