|
Beacon Press Books
A beacon is an intentionally conspicuous device designed to attract attention to a specific location. A common example is the lighthouse, which draws attention to a fixed point that can be used to navigate around obstacles or into port. More modern examples include a variety of radio beacons that can be read on radio direction finders in all weather, and radar transponders that appear on radar displays. Beacons can also be combined with semaphoric or other indicators to provide important information, such as the status of an airport, by the colour and rotational pattern of its airport beacon, or of pending weather as indicated on a weather beacon mounted at the top of a tall building or similar site. When used in such fashion, beacons can be considered a form of optical telegraphy. For navigation Beacons help guide navigators to their destinations. Types of navigational beacons include radar reflectors, radio beacons, sonic and visual signals. Visual beacons range from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geodetic Datum
A geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame, or terrestrial reference frame) is a global datum reference or reference frame for unambiguously representing the position of locations on Earth by means of either geodetic coordinates (and related vertical coordinates) or geocentric coordinates. DatumsThe plural is not "data" in this case are crucial to any technology or technique based on spatial location, including geodesy, navigation, surveying, geographic information systems, remote sensing, and cartography. A horizontal datum is used to measure a horizontal position, across the Earth's surface, in latitude and longitude or another related coordinate system. A ''vertical datum'' is used to measure the elevation or depth relative to a standard origin, such as mean sea level (MSL). A three-dimensional datum enables the expression of both horizontal and vertical position components in a unified form. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lefkada
Lefkada (, ''Lefkáda'', ), also known as Lefkas or Leukas (Ancient Greek and Katharevousa: Λευκάς, ''Leukás'', modern pronunciation ''Lefkás'') and Leucadia, is a Greece, Greek list of islands of Greece, island in the Ionian Sea on the west coast of Greece, connected to the mainland by a long causeway and Pontoon bridge, floating bridge. The principal town of the island and seat of the municipality is Lefkada (city), Lefkada. It is situated on the northern part of the island, approximately 25 minutes by automobile away from Aktion National Airport. The island is part of the Lefkada (regional unit), regional unit of Lefkada. Geography Lefkada measures from north to south, and from east to west. The area of the island is about , the area of the municipality (including the islands Kalamos (island), Kalamos, Kastos and several smaller islets) is . Its highest point is the mountain Stavrota, at above mean sea level, above sea level, situated in the middle of the island. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corcyra
Corfu ( , ) or Kerkyra (, ) is a Greece, Greek island in the Ionian Sea, of the Ionian Islands; including its Greek islands, small satellite islands, it forms the margin of Greece's northwestern frontier. The island is part of the Corfu (regional unit), Corfu regional unit, and is administered by three municipalities with the islands of Othonoi, Ereikoussa, and Mathraki. The principal city of the island (pop. 32,095) is also named Corfu (city), Corfu. Corfu is home to the Ionian University. The island is bound up with the history of Greece from the beginnings of Greek mythology, and is marked by numerous battles and conquests. Ancient Korkyra (polis), Korkyra took part in the Battle of Sybota which was a catalyst for the Peloponnesian War, and, according to Thucydides, the largest naval battle between Greek city states until that time. Thucydides also reports that Korkyra was one of the three great naval powers of Greece in the fifth century BCE, along with Classical Athens, At ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peloponnese
The Peloponnese ( ), Peloponnesus ( ; , ) or Morea (; ) is a peninsula and geographic region in Southern Greece, and the southernmost region of the Balkans. It is connected to the central part of the country by the Isthmus of Corinth land bridge which separates the Gulf of Corinth from the Saronic Gulf. From the late Middle Ages until the 19th century, the peninsula was known as the Morea, a name still in colloquial use in its demotic form. The peninsula is divided among three administrative regions: most belongs to the Peloponnese region, with smaller parts belonging to the West Greece and Attica regions. Geography The Peloponnese is a peninsula located at the southern tip of the mainland, in area, and constitutes the southernmost part of mainland Greece. It is connected to the mainland by the Isthmus of Corinth, where the Corinth Canal was constructed in 1893. However, it is also connected to the mainland by several bridges across the canal, including two submers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
