Similar
![20072.BL-Group 1--Slateford, PA--Delaware River Viaduct Bridge no. 27.19 [1908-1910]](https://cache.getarchive.net/Prod/thumb/cdn2/L3Bob3RvLzIwMjEvMDIvMTEvMjAwNzJibC1ncm91cC0xLXNsYXRlZm9yZC1wYS1kZWxhd2FyZS1yaXZlci12aWFkdWN0LWJyaWRnZS1uby0yNzE5LTE5MDgtMTkxMC1mZjhjNDQtNjQwLmpwZw%3D%3D/40/26/webp "20072.BL-Group 1--Slateford, PA--Delaware River Viaduct Bridge no. 27.19 [1908-1910]")
Related
Chart of the head of navigation of the Potomac River shewing the route of the Alexandria Canal : made in pursuance of a resolution of the Alex'a Canal Company Oct. 1838 /
Summary
Nautical chart with extensive annotations in col. and lead pencils to show proposed railroad routes connecting central Washington and Alexandria (Va.).
Relief shown by hachures. Depths shown by contours and soundings.
Oriented with north toward the lower right.
Originally printed on 2 sheets.
Includes note.
LC copy soiled, stained, missing edge sections, and mounted on cloth backing.
Available also through the Library of Congress Web site as a raster image.
Phillips. Washington, 79
DCP
Vault
The word portolan comes from the Italian adjective portolano, meaning "related to ports or harbors", or "a collection of sailing directions". Portolan charts are maps based on compass directions and estimated distances observed by the pilots at sea. They were first made in the 13th century in Italy, and later in Spain and Portugal where they considered to be state secrets. The English and Dutch found the description of Atlantic and Indian coastlines extremely valuable for their raiding, and later trading, ships. The oldest survived portolan is the Carta Pisana, dating from approximately 1296 and the oldest preserved Majorcan Portolan chart is the one made by Angelino Dulcert who produced a portolan in 1339.
Tags
Date
Contributors
Source
Copyright info
