DEM は、1 km、2 km、5 km のグリッド セル内で蓄積された標高測定値に対する時空間適合から形成され、1 km の最頻解像度で投稿されます。DEM と NASA の Operation IceBridge キャンペーン中に取得された 2.3*107 の航空レーザー高度計測定値の差の中央値と二乗平均平方根は、それぞれ -0.30 m と 13.50 m です。
DEM の不確実性は、傾斜の大きい地域で高くなります。特に、標高測定が低解像度モードで取得された地域で高くなります。これを考慮して、平均精度は 9.5 m と推定されます。
Slater, T.、Shepherd, A.、McMillan, M.、Muir, A.、Gilbert, L.,
Hogg, A. E., Konrad, H.、Parrinello, T.: A new Digital Elevation
Model of Antarctica derived from CryoSat-2 altimetry, The Cryosphere,
doi:10.5194/tc-2017-223, 2018
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["必要な情報がない","missingTheInformationINeed","thumb-down"],["複雑すぎる / 手順が多すぎる","tooComplicatedTooManySteps","thumb-down"],["最新ではない","outOfDate","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["サンプル / コードに問題がある","samplesCodeIssue","thumb-down"],["その他","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis dataset provides a 1 km resolution digital elevation model (DEM) of the Antarctic ice sheet and ice shelves.\u003c/p\u003e\n"],["\u003cp\u003eThe DEM is derived from CryoSat-2 satellite radar altimetry data collected between July 2010 and July 2016.\u003c/p\u003e\n"],["\u003cp\u003eIt includes elevation, data composition, slope, a smoothed elevation model, and elevation uncertainty bands.\u003c/p\u003e\n"],["\u003cp\u003eThe DEM has an average accuracy of 9.5m and was validated against NASA Operation IceBridge airborne laser altimeter measurements.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is provided by CPOM and has specific terms of use.\u003c/p\u003e\n"]]],["The dataset provides a digital elevation model (DEM) of the Antarctic ice sheet and shelves, derived from CryoSat-2 satellite radar altimeter observations between July 2010 and July 2016. Elevation measurements were fitted within 1, 2, and 5 km grid cells, with a 1 km modal resolution. The data includes elevation, data composition, slope, a smoothed elevation version, and elevation uncertainty. Users can access the dataset through Earth Engine using a provided code snippet. The average accuracy is estimated to be 9.5m.\n"],null,[]]