This layer is a georeferenced raster image of the historic paper map entitled: Official railway map of London and its environs, prepared and published at the Railway Clearing House, London ; drawn and engraved by J. W. Emslie, London. It was published by Railway Clearing House in 1899. Scale [ca. 1:33,000]. Covers greater London. The image inside the map neatline is georeferenced to the surface of the earth and fit to the British National Grid coordinate system (British National Grid, Airy Spheroid OSGB (1936) Datum). 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, index maps, legends, or other information associated with the principal map. This map shows features such as railroads, railroad stations, drainage, selected buildings and industry locations (e.g. mills, factories), county boundaries, and more. Relief is shown by hachures. 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.