This layer is a georeferenced raster image of the historic paper map entitled: A chart of the harbour of Boston : with soundings, sailing marks, &c. taken from Holland's survey's [sic], carefully revised and corrected by Osgood Carleton, Esqr. Republished and sold by W. Norman, book and chart-seller ca. 1800. Scale [ca. 1:25,500]. Covers Boston Harbor and adjacent lands. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Massachusetts State Plane Coordinate System, Mainland Zone (in Feet) (Fipszone 2001). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, or other information associated with the principal map. This map shows coastal features such as rocks, channels, points, coves, islands, and more. Depths are shown by soundings and shading. It also shows land features such as roads, drainage, and more. Relief is shown pictorially and by hachures. This layer is part of a selection of digitally scanned and georeferenced historic maps of Massachusetts from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of regions, originators, ground condition dates (1755-1922), scales, and purposes. The digitized selection includes maps of: the state, Massachusetts counties, town surveys, coastal features, real property, parks, cemeteries, railroads, roads, public works projects, etc.