Fichier:Checkerboard forest in Idaho.jpg
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Afrikaans: ’n Ruimtevaarder aan boord van die Internasionale Ruimtestasie het hierdie opvallende skaakbordpatroon langs die Priestrivier in die noorde van Idaho waargeneem. Die foto is net voor sononder geneem, sodat sommige berghange gloei terwyl ander deur lang skaduwees bedek word weens die lae sonhoek.
Die kwartmylbreë (400 m) vierkante in hierdie landskapskaakbord blyk die resultaat van bosbestuur te wees. Soortgelyke patrone het in die 1800's ontstaan, toe alternatiewe lappies grond deur die Amerikaanse regering aan spoorweë soos die Noord-Pasifiese Spoorweg toegestaan is, en etlike lappies grond in die Pasifiese Noordweste verkoop en die hout geoes is. Die grond wat hier gewys word, word tans vir wild en bosbou aangewend. Die wit kolle weerspieël gebiede met jonger, kleiner bome, waar wintersneeubedekking helder vir die ruimtevaarders vertoon. Donker groenbruin blokkies is lappies van digter, ongeskonde woud. Die skaakbord-benadering handhaaf die volhoubaarheid van beboste streke, terwyl die oes van bome 'n opsie bly. Die Priestrivier, wat van bo na onder deur die toneel kronkel, word weerskante deur 'n woudbuffer begrens wat as 'n natuurlike filtrasiestelsel kan dien om waterkwaliteit te beskerm. Byna 'n eeu lank is die rivier benut om hout te vervoer. Dit het egter in 1968 verander toe die rivier se hoofstroom by 'n lys van "wilde en natuurskoon riviere" gevoeg is om vir hul "uitstaande natuurlike, kulturele en ontspanningsvoordele" in 'n natuurlik-funksionerende toestand vir die genot van huidige en toekomstige geslagte bewaar te word. Whitetail Butte (links op beeld) is histories deur staats- en federale grondbestuurders as 'n uitkykpunt vir bosbrande gebruik.English: An astronaut aboard the International Space Station observed this distinctive checkerboard pattern alongside the Priest River in northern Idaho. The photograph was taken just before sunset, so some mountainsides glow while others are covered in long shadows because of the low Sun angle.
The quarter-mile (400 m) squares in this landscape checkerboard appear to be the result of forest management. Similar patterns originated in the 1800s, when alternate parcels of land were granted by the U.S. government to railroads such as the Northern Pacific. Many parcels in the Pacific Northwest were later sold off and harvested for timber. The land shown here is now managed for wildlife and for timber harvesting. The white patches reflect areas with younger, smaller trees, where winter snow cover shows up brightly to the astronauts. Dark green-brown squares are parcels of denser, intact forest. The checkerboard is used as a method of maintaining the sustainability of forested tracts while still enabling a harvest of trees. The Priest River, winding through the scene from top to bottom, is bordered on both sides by a forest buffer that can serve as a natural filtration system to protect water quality. For nearly a century, the river was used to transport logs. Its function changed in 1968 when the river’s main stem was added to a list of “wild and scenic rivers” in order to preserve its “outstanding natural, cultural, and recreational values in a free-flowing condition for the enjoyment of present and future generations.” Whitetail Butte has historically been used by state and federal land managers as a lookout point for forest fires. |
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| Source | http://earthobservatory.nasa.gov/IOTD/view.php?id=89541&eocn=image&eoci=moreiotd |
| Auteur | "An astronaut aboard the International Space Station"—"a member of the Expedition 50 crew" |
| Lieu de la prise de vue |  | Voir cet endroit et d’autres images sur : OpenStreetMap |  |
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Astronaut photograph ISS050-E-28519 was acquired on January 4, 2017, with a Nikon D4 digital camera using an 1150 millimeter lens, and is provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center. The image was taken by a member of the Expedition 50 crew. The image has been cropped and enhanced to improve contrast, and lens artifacts have been removed. The International Space Station Program supports the laboratory as part of the ISS National Lab to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by Andi Hollier, Hx5, and M. Justin Wilkinson, Texas State University, Jacobs Contract at NASA-JSC. The photo's vantage point was outer space but relative to the surface of the earth, it is rotated approximately 20° clockwise.
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Cette image a été promue selon les critères des images de valeur, et est considérée comme l’image de plus grande valeur sur Commons dans le domaine : Forests in Idaho, checkerboard forest photographed from the International Space Station.. La proposition est consultable sur Commons:Valued image candidates/Checkerboard forest in Idaho.jpg. |
| Annotations | Cette image est annotée : Voir les annotations sur Wikimedia Commons |
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| Date et heure | Vignette | Dimensions | Utilisateur | Commentaire | |
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| actuel | 7 février 2017 à 07:52 | | 4 928 × 3 280 (7,97 Mio) | Koavf | {{Information |Description ={{en|1=An astronaut aboard the International Space Station observed this distinctive checkerboard pattern alongside the Priest River in northern Idaho. The photograph was taken just before sunset, so some mountainsides gl... |
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