Snellen chart. A wall chart developed by a Dutch ophthalmologist Hermann Snellen in the 19th century, which is still used today to measure visual acuity. It consists of 11 lines of block letters of decreasing size, which are to be read at a distance of 6 metres (20 feet).
See bridge in maps. Pont de Normandie is a cable-stayed road bridge that crosses the river Seine and contect Le Havre to Honfleur in Normandy, in France. The bridge was designed by Michel Virlogeux. Construction began in 1988 and the bridge was opened in January 1995.
detailed map of Portes-les-Valence and near places. Welcome to the Portes-les-Valence google satellite map! This place is situated in Valence, Drome, Rhone-Alpes, France, its geographical coordinates are 44Â° 52' 0 North, 4Â° 53' 0 East and its original name (with diacritics) is Portes-les-LÃ¨s. valenceirports in Portes-les-Valence and in the neighbourhood. Airports nearest to Portes-les-Valence are sorted by the distance to the airport from the city centre. Follow relate airport hotel guides for accommodation booking.