Twin Peaks Tunnel assessment map, San Francisco, California 1927 (Raster Image)

This map shows features such as roads, railroads, tunnels, drainage, selected public buildings, city block numbers, land assessment figures, cemeteries, parks, and more. Relief is shown by hachures. Includes inset: Map showing the boundaries of the city and county of San Francisco.

Includes monetary assessment for cost of tunnel. This layer is part of a selection of digitally scanned and georeferenced historic maps from The Harvard Map Collection as part of the Imaging the Urban Environment project. Maps selected for this project represent major urban areas and cities of the world, at various time periods.

These maps typically portray both natural and manmade features at a large scale. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.