Google Earth Engine ——MERIT/DEM/v1_0_3影像100M分辨率數(shù)據(jù)集

MERIT DEM a high accuracy global DEM at 3 arc second resolution (~90 m at the equator) produced by eliminating major error components from existing DEMs (NASA SRTM3 DEM, JAXA AW3D DEM, Viewfinder Panoramas DEM). MERIT DEM separates absolute bias, stripe noise, speckle noise and tree height bias using multiple satellite datasets and filtering techniques. After the error removal, land areas mapped with 2 m or better vertical accuracy were increased from 39% to 58%. Significant improvements were found in flat regions where height errors larger than topography variability, and landscapes such as river networks and hill-valley structures became clearly represented.

'MERIT DEM was developed by processing the following products as baseline data:

NASA SRTM3 DEM v2.1

JAXA AW3D - 30 m DEM v1

Viewfinder Panoramas DEM

In addition to the above baseline dems, these products were used as supplementary data:

NASA-NSIDC ICESat/GLAS GLA14 data

U-Maryland Landsat forest cover data

NASA Global Forest height data

JAMSTEC/U-Tokyo G3WBM water body data'

MERIT DEM是通過(guò)消除現(xiàn)有DEM（NASA SRTM3 DEM、JAXA AW3D DEM、Viewfinder Panoramas DEM）中的主要誤差成分而產(chǎn)生的3角秒分辨率的高精度全球DEM（赤道上約90米）。MERIT DEM利用多個(gè)衛(wèi)星數(shù)據(jù)集和過(guò)濾技術(shù)，分離了絕對(duì)偏差、條紋噪聲、斑點(diǎn)噪聲和樹(shù)高偏差。去除誤差后，以2米或更好的垂直精度測(cè)繪的土地面積從39%增加到58%。在高度誤差大于地形變化的平坦地區(qū)發(fā)現(xiàn)了明顯的改進(jìn)，河網(wǎng)和山谷結(jié)構(gòu)等地貌變得清晰可見(jiàn)。

MERIT DEM是通過(guò)處理以下產(chǎn)品作為基線數(shù)據(jù)開(kāi)發(fā)的。

NASA SRTM3 DEM v2.1

JAXA AW3D - 30米DEM v1

取景器全景圖DEM

除上述基線數(shù)據(jù)外，還使用了這些產(chǎn)品作為補(bǔ)充數(shù)據(jù)。

NASA-NSIDC ICESat/GLAS GLA14數(shù)據(jù)

U-Maryland Landsat森林覆蓋數(shù)據(jù)

NASA全球森林高度數(shù)據(jù)

JAMSTEC/U-Tokyo G3WBM水體數(shù)據(jù)'。

Dataset Availability

1987-01-01T00:00:00 - 2017-01-01T00:00:00

Dataset Provider

Dai Yamazaki (University of Tokyo)

Collection Snippet

ee.Image("MERIT/DEM/v1_0_3")

Bands Table

使用說(shuō)明：

'Citation to the paper is adequate if you simply use MERIT DEM. If you asked for help for additional handling/editing of the dataset, or if your research outcome highly depends on the product, the developer would request co-authorship.

MERIT DEM is licensed under a Creative Commons "CC-BY-NC 4.0" or Open Data Commons "Open Database License (ODbL 1.0)". With a dual license, you can choose an appropriate license for you.

To view a copy of these license, please visit:

CC-BY-NC 4.0 license: Non-Commercial Use with less restriction.

ODbL 1.0 license: Commercial Use is OK, but the derived data based on MERIT DEM should be made publicly available under the same ODbL license. For example, if you create a flood hazard map using MERIT DEM and you would like to provide a COMMERCIAL service based on that, you have to make the hazard map PUBLICLY AVAILABLE under OdBL license.

Note that the above license terms are applied to the "derived data" based on MERIT DEM, while they are not applied to "produced work / artwork" created with MERIT DEM (such as figures in a journal paper). The users may have a copyright of the artwork and may assign any license, when the produced work is not considered as "derived data".

By downloading and using the data the user agrees to the terms and conditions of one of these licenses. Notwithstanding this free license, we ask users to refrain from redistributing the data in whole in its original format on other websites without the explicit written permission from the authors.

The copyright of MERIT DEM is held by the developers, 2018, all rights reserved.'

MERIT DEM采用知識(shí)共享 "CC-BY-NC 4.0 "或開(kāi)放數(shù)據(jù)共享 "開(kāi)放數(shù)據(jù)庫(kù)許可（ODbL 1.0）"進(jìn)行許可。通過(guò)雙重許可證，你可以選擇適合你的許可證。

要查看這些許可證的副本，請(qǐng)?jiān)L問(wèn)。

CC-BY-NC 4.0許可證。非商業(yè)使用，限制較少。

ODbL 1.0許可證。商業(yè)使用是可以的，但基于MERIT DEM的衍生數(shù)據(jù)應(yīng)在相同的ODbL許可證下公開(kāi)提供。例如，如果你用MERIT DEM創(chuàng)建了一個(gè)洪水災(zāi)害地圖，并且你想在此基礎(chǔ)上提供商業(yè)服務(wù)，你必須在ODBL許可證下公開(kāi)提供該災(zāi)害地圖。

請(qǐng)注意，上述許可條款適用于基于MERIT DEM的 "衍生數(shù)據(jù)"，而不適用于用MERIT DEM創(chuàng)作的 "作品/藝術(shù)作品"（如期刊論文中的數(shù)字）。當(dāng)制作的作品不被視為 "派生數(shù)據(jù) "時(shí)，用戶可以擁有藝術(shù)品的版權(quán)，并可以轉(zhuǎn)讓任何許可。

MERIT DEM的版權(quán)由開(kāi)發(fā)者持有，2018年，所有權(quán)利保留。

引用：

Yamazaki D., D. Ikeshima, R. Tawatari, T. Yamaguchi, F. O'Loughlin, J.C. Neal, C.C. Sampson, S. Kanae & P.D. Bates. A high accuracy map of global terrain elevations. Geophysical Research Letters, vol.44, pp.5844-5853, 2017.?doi:10.1002/2017GL072874

代碼：

var dataset = ee.Image("MERIT/DEM/v1_0_3");

var visualization = {

bands: ['dem'],

min: -3,

max: 18,

palette: ['000000', '478FCD', '86C58E', 'AFC35E', '8F7131',

'B78D4F', 'E2B8A6', 'FFFFFF']

};

Map.setCenter(90.301, 23.052, 10);

Map.addLayer(dataset, visualization, "Elevation");

開(kāi)發(fā)者

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版權(quán)聲明：本文內(nèi)容由網(wǎng)絡(luò)用戶投稿，版權(quán)歸原作者所有，本站不擁有其著作權(quán)，亦不承擔(dān)相應(yīng)法律責(zé)任。如果您發(fā)現(xiàn)本站中有涉嫌抄襲或描述失實(shí)的內(nèi)容，請(qǐng)聯(lián)系我們jiasou666@gmail.com 處理，核實(shí)后本網(wǎng)站將在24小時(shí)內(nèi)刪除侵權(quán)內(nèi)容。