Wednesday, November 20, 2013

Scientists digitally map out entire Great Barrier Reef for the first time



First high resolution map of the entire reef from the world's biggest satellite-derived bathymetry survey

Welcome to the homepage for the high resolution, satellite-derived bathymetry (SDB) of the entire Great Barrier Reef (GBR). Here you can learn more about the project, download free samples, and order both the flagship 30 m horizontal resolution product. To learn more about the project and the products, including an introduction to SDB, please download the project information booklet, press release and the overview map (also accessible by clicking on the pdf icon to the right).

The Products

The two main product types that are made being available here are:
  • Digital, shallow water bathymetry (underwater topography) maps for any or all parts of the GBR
  • Digital, shallow water seafloor reflectance (color and brightness) maps for any or all parts of the GBR
Please note that all bathymetry products are at a nominal 10 cm vertical resolution. For a more detailed description, as well as independent assessments of these products, please see the project information booklet.

Sample data

Please follow this link to download sample data of the main products available for purchase, as well as a sample of the next generation 2 m resolution product.

For free

Download entire GBR bathymetry, down-sampled to 500m horizontal resolution

Saturday, November 16, 2013

Tir-na-nog





In Irish manuscripts, the Otherworld beyond the Ocean bears many names. It is Tir-na-nog, 'The Land of Youth'; Tir-Innambéo, 'The Land of the Living'; Tir Tairngire, 'The Land of Promise'; Tir N-aill, 'The Other Land (or World)'; Mag Mar, 'The Great Plain'; and also Mag Mell, 'The Plain Agreeable (or Happy).'

But this western Otherworld, if it is what we believe it to be--a poetical picture of the great subjective world--cannot be the realm of any one race of invisible beings to the exclusion of another. In it all alike--gods, Tuatha De Danann, fairies, demons, shades, and every sort of disembodied spirits--find their appropriate abode; for though it seems to surround and interpenetrate this planet even as the X-rays interpenetrate matter, it can have no other limits than those of the Universe itself. And that it is not an exclusive realm is certain from what our old Irish manuscripts record concerning the Fomorian races. These, when they met defeat on the battle-field of Moytura at the hands of the Tuatha De Danann, retired altogether from Ireland, their overthrow being final, and returned to their own invisible country--a mysterious land beyond the Ocean, where the dead find a new existence, and where their god-king Tethra ruled, as he formerly ruled in this world. And the fairy women of Tethra's kingdom, even like those who came from the Tuatha De Danann of Erin, or those of Manannan's ocean-world, enticed mortals to go with them to be heroes under their king, and to behold there the assemblies of ancestors. It was one of them who came to Connla, son of Conn, supreme king of Ireland; and this was her message to him:--'The immortals invite you. You are going to be one of the heroes of the people of Tethra. You will always be seen there, in the assemblies of your ancestors, in the midst of those who know and love you.' And with the fairy spell upon him the young prince entered the glass boat of the fairy woman, and his father the king, in great tribulation and wonder, beheld them disappear across the waters never to return.

THE SILVER BRANCH AND THE GOLDEN BOUGH 

To enter the Otherworld before the appointed hour marked by death, a passport was often necessary, and this was usually a silver branch of the sacred apple-tree bearing blossoms, or fruit, which the queen of the Land of the Ever-Living and Ever-Young gives to those mortals whom she wishes for as companions; though sometimes, as we shall see, it was a single apple without its branch. The queen's gifts serve not only as passports, but also as food and drink for mortals who go with her. Often the apple-branch produces music so soothing that mortals who hear it forget all troubles and even cease to grieve for those whom the fairy women take. For us there are no episodes more important than those in the ancient epics concerning these apple-tree talismans, because in them we find a certain key which unlocks the secret of that world from which such talismans are brought, and proves it to be the same sort of a place as the Otherworld of the Greeks and Romans. Let us then use the key and make a few comparisons between the Silver Branch of the Celts and the Golden Bough of the Ancients, expecting the two symbols naturally to differ in their functions, though not fundamentally.

It is evident at the outset that the Golden Bough was as much the property of the queen of that underworld called Hades as the Silver Branch was the gift of the Celtic fairy queen, and like the Silver Bough it seems to have been the symbolic bond between that world and this, offered as a tribute to Proserpine by all initiates, who made the mystic voyage in full human consciousness. And, as we suspect, there may be even in the ancient Celtic legends of mortals who make that strange voyage to the Western Otherworld and return to this world again, an echo of initiatory rites--perhaps druidic--similar to those of Proserpine as shown in the journey of Aeneas, which, as Virgil records it, is undoubtedly a poetical rendering of an actual psychic experience of a great initiate.

Folkvangr




In Norse mythology, Fólkvangr (“field of the host” or “people-field” or “army-field”) is a meadow or field ruled over by the goddess Freyja where half of those that die in combat go upon death, while the other half go to the god Odin in Valhalla.

Fólkvangr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson. According to the Prose Edda, within Fólkvangr is Freyja’s hall Sessrúmnir.

To go to either Valhalla or Folkvangr is to be chosen for one's valor and skill.  Which of these halls you find yourself in depends entirely on who chose you: Odin's chosen are in Valhalla, while Freyja's are in Folkvangr.  However, these should not be thought of as "paradises," nor are they the only ones.  There are a great many possible afterlifes in the germano-celtic beliefs, and most of them are defined by a certain purpose.  In the case of these two, those who dwell there (the Einherjar) will fight on our behalf at the Ragnarok, and so were chosen for qualities that suit that purpose.

Many, if not most, of the dead go to Hel (sometimes called Helheim) -- but this is not comparable to the "hell" of Christianity, as it is not necessarily a place of punishment.  There is no Norse/German/Celtic equivalent to the idea of "salvation" so there is no need for an eternal punishment.  The main distinction between Hel and the other possibilities, is that Hel is not a place of distinct purpose.  It is simply a place to dwell, and wait, while feasting with Baldr and Hella in her hall.

KYON ORTHROS (or Orthus)




Two-headed dog of Geryon, one of the monstrous offspring of Typhon and Echidne and father of the Sphinx, either by Echidne or the Chimaera. He was killed by Heracles, along with Eurytion, when Heracles was sent to steal the cattle of Geryon, which Orthros and Eurytion guarded.

The word orthros in Greek means "morning twilight." His name was also spelt Orthos, after another word meaning "straight" or "height."

Hesiod, Theogony 326 ff (trans. Evelyn-White) (Greek epic C8th or C7th B.C.):
"But she [the Khimaira or perhaps Ekhidna] in love with Orthos, mothered the deadly Sphinx . . . and the Nemeian lion."

Hesiod, Theogony 309:
"First she [Ekhidna] bore him [Typhon] Orthos, who was Geryones' herding dog."

Hesiod, Theogony 293 ff:
"[Herakles] killed Orthos and the oxherd Eurytion out in that gloomy meadow beyond the fabulous Okeanos."

Pindar, Isthmian Ode 1 ep 1 (trans. Conway) (Greek lyric C5th B.C.):
"Alkmene bore that dauntless son [Herakles], to whom long since the fierce hounds of Geryon yielded in trembling terror."

Pseudo-Apollodorus, Bibliotheca 2. 106 - 108 (trans. Aldrich) (Greek mythographer C2nd A.D.):
"He [Geryon] owned crimson-colored cattle, which were herded by Eurytion and protected by Orthos, the hound with two heads born of Ekhidna and Typhon . . . When he [Herakles] reached Erytheia he camped on Mount Abas. The dog smelled him there and went after him, but he struck at it with his club, and when the cowherd Eurytion came to help the dog, he slew him as well."

Quintus Smyrnaeus, Fall of Troy 6. 249 ff (trans. Way) (Greek epic C4th A.D.):
"There [depicted on the shield of Eurypylos son of Herakles] lay the bulk of giant Geryon dead mid his kine . . . Before him slain lay that most murderous hound Orthros, in furious might like Kerberos his brother-hound: a herdman lay thereby, Eurytion, all bedabbled with his blood."