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1: 2010-05-02 (Sun) 14:11:11 admin source
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 +** Geo System[#n452847f] 
 +- OpenSim Diorama を美しく見る 
 +-- renderVolumeLODFactor set 4 
 +-- renderTerrainLODFactor set 4 
 +- 日本測地系=>世界測地系 簡易返還式 
 + BWGS84 = BTokyo - 0.00010695 *BTokyo + 0.000017464*LTokyo + 0.0046017 
 + LWGS84 = LTokyo - 0.000046038*BTokyo - 0.000083043*LTokyo + 0.010040 
 +- SRTM (Shuttle Radar Topography Mission) 
 +-- SRTM1   1秒メッシュ 約30m アメリカのみ 
 +-- SRTM3   3秒メッシュ 約90m 全世界 
 +-- SRTM30 30秒メッシュ 約900m 
 +-- 解説 http://www.jpl.nasa.gov/srtm/ 
 +-- ダウンロード http://dds.cr.usgs.gov/srtm/ 
 +- Landsat 7 
 +-- ダウンロード ftp://ftp.glcf.umiacs.umd.edu/glcf/Lands​at/ 
 +-メモ 
 +-- 数値標高モデル(DSM: Digital Surface Model)  測定生データ 
 +-- 数値地形モデル(DTM: Digital Terrain Model)  DEMの加工データ.地形を表す. 
 +-- SRTM30Plus 海底標高データ 
 +- 参考ページ 
 +-- SRTM  http://www.kashmir3d.com/srtm/ 
 +-- Landsat 7  http://oasis.halfmoon.jp/other/kashmir/ ​
 +#br


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