Topographic Maps and Sketch Mapping

alidade Biglerville bodies are blue bounded by parallels British General Staff brown contours brown shading Carte de France Chestnut Hill clinometer colors contour line contour map conventional signs described difference in elevation direction drainage drawing drawn edge equals 1 mile feet field fifth contour forests French map green ground hachures Hansrote horizontal distance inch equals indicated interpolated interval landscape sketch letters line of sight Little Orleans Longitude is reckoned Map Reading measured meters method Note objects Ordnance Survey parallels and meridians Plainview plotted point of set-up printed reconnaissance map rectangular sheets Relief is shown represent rivers roads are shown scale maps sheet covers shown in Fig simple sketch board sketch mapping slope board slope scale spot heights square streams tion topographic map tracing paper traverse triangulation U. S. G. S. maps vertical angle water bodies yards