Outline of the Method of Conducting a Trigonometrical Survey: For the Formation of Geographical and Topographical Maps and Plans, Military Reconnaissance, Levelling, Etc (Classic Reprint) - Softcover

Excerpt from Outline of the Method of Conducting a Trigonometrical Survey: For the Formation of Geographical and Topographical Maps and Plans, Military Reconnaissance, Levelling, Etc

Sketching, in place of tracing contour lines, has been again lately resorted to on the Ordnance Survey for the features of the ground, on account of the greater cost of the latter more accurate system.

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