Topographic Drawings by E. Hergesheimer, Assistant. Polar Bay of San Pablo

Bay of San Pablo

May 9th 1846

aids and hazards to navigation and terrestrial features (farmlands

Highly detailed map showing streets

Topographic Drawings by E. Hergesheimer, Assistant. Polar Bay of San PabloThese 1: 10,000 Scale drawings are reference and example drawings showing the proposed techniques and styles for what would become the standards of topographic mapping and cartography. Contour lines were still uncommon on maps of the day. Examples include: Heavy Oak Woods, Reclaimed Marsh and Orchards (Delaware River)Railroads, Canals, Iron Bridges, Rocky cliffs, Mid river drift, Water worn Rocks, Mixed Woods overhill curves (Harper's Ferry)Rice,