ファイル:Topography of Bali.jpg

	このファイルはアメリカ航空宇宙局（NASA）によって作成されたものです。NASAの著作権の方針では、特記事項が無い場合、NASAの資料はパブリックドメインとなります。 （詳しくはTemplate:PD-USGov、NASAの著作権の方針について（英語）又はジェット推進研究所(JPL)の画像使用に関するガイドライン（英語）をご覧ください。）
	注意事項: NASAのロゴや記章・紋章の使用は米国法14 CFR 1221で制限されています。 NASA の公式ウェブサイトには、アメリカの宇宙開発局ではないソ連・ロシア連邦宇宙局からの画像も数多く収録されています。これらのファイルや資料は必ずしもパブリックドメインであるとは限りません。 ハッブル宇宙望遠鏡による資料は、宇宙望遠鏡科学研究所(STScI)による提供である場合パブリックドメインではない可能性があります。 ハッブル宇宙望遠鏡公式サイトの著作権ポリシー（英語）。詳しくは{{PD-Hubble}}や{{Cc-Hubble}}、{{Spacetelescope.org}}もご覧ください。 太陽・太陽圏観測衛星（SOHO, ESA & NASA）と共同のプロジェクトでは、宇宙探査用のロケットからの画像やデータを学校教育や非営利的な目的で使用することを容認していますが、その際は適切な著作権者帰属表示が求められています。（SOHOによる著作権ポリシー（英語）） 宇宙の今日の一枚(APOD)のサイトに掲載された画像は、著作権保護の対象になっている可能性があります。APODについて（英語）

• Source: http://earthobservatory.nasa.gov/Newsroom/NewImages/Images/PIA04950_lrg.jpg

• See Also: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=16436

• Image Policy at: http://earthobservatory.nasa.gov/masthead.html

Topography of Bali

The volcanic nature of the island of Bali is evident in this shaded relief image generated with data from the Shuttle Radar Topography Mission (SRTM).

Bali, along with several smaller islands, make up one of the 27 Provinces of Indonesia. It lies over a major subduction zone where the Indo-Australian tectonic plate collides with the Sunda plate, creating one of the most volcanically active regions on the planet.

The most significant feature on Bali is Gunung Agung, the symmetric, conical mountain at the right-center of the image. This "stratovolcano," 3,148 meters (10,308 feet) high, is held sacred in Balinese culture, and last erupted in 1963 after being dormant and thought inactive for 120 years. This violent event resulted in over 1,000 deaths, and coincided with a purification ceremony called Eka Dasa Rudra, meant to restore the balance between nature and man. This most important Balinese rite is held only once per century, and the almost exact correspondence between the beginning of the ceremony and the eruption is believed by those involved to have great religious significance.

Two visualization methods were combined to produce the image: shading and color coding of topographic height. The shade image was derived by computing topographic slope in the northwest-southeast direction, so that northwest slopes appear bright and southeast slopes appear dark. Color coding is directly related to topographic height, with green at the lower elevations, rising through yellow and tan, to white at the highest elevations.

Elevation data used in this image were acquired by the Shuttle Radar Topography Mission aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Geospatial-Intelligence Agency (NGA) of the U.S. Department of Defense and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Earth Science Enterprise, Washington, D.C.

• Location: 8.33 degrees South latitude, 115.17 degrees East longitude
• Orientation: North toward the top, Mercator projection
• Size: 153 by 112 kilometers (95 by 69 miles)
• Image Data: shaded and colored SRTM elevation model
• Date Acquired: February 2000

Image Courtesy SRTM Team NASA/JPL/NIMA

nb: Originally uploaded by me, Jack Merridew, as w:User:Davenbelle, on en:wp:

• http://en.wikipedia.org/w/index.php?title=Special%3ALog&type=upload&user=Davenbelle&page=File%3APIA04950+lrg+Topography+of+Bali.jpg