Google Earth Engine—该数据集提供了格陵兰岛冰盖的完整的15米分辨率的图像，该图像来自1999年至2002年的Landsat 7 ETM+和RADARSAT-1 SAR图像

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发布于 2024-02-02 10:18:48

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发布于 2024-02-02 10:18:48

This dataset provides a complete 15 m resolution image mosaic of the Greenland ice sheet derived from Landsat 7 ETM+ and RADARSAT-1 SAR imagery from the years 1999 to 2002. The methods include a combination of image cloud masking, pan sharpening, image sampling and resizing, and image coregistration. Please see Howat, 2014 for more information regarding processing methods.

Note

Users of GIMP DEM or GIMP 2000 Image Mosaic images may find it helpful to mask out areas outside of the Greenland coastline using the corresponding 15 m ocean mask image Greenland Ice Mapping Project (GIMP) Land Ice and Ocean Classification Mask,
The SAR data are distributed at 20 m resolution. Data were up-sampled through bilinear interpolation to 15 m to match the resolution of Landsat band-8.

General documentation

该数据集提供了格陵兰岛冰盖的完整的15米分辨率的图像马赛克，该图像来自1999年至2002年的Landsat 7 ETM+和RADARSAT-1 SAR图像。这些方法包括图像云遮蔽、平移锐化、图像取样和大小调整以及图像核对的组合。关于处理方法的更多信息，请参见Howat, 2014。

备注

GIMP DEM或GIMP 2000图像马赛克的用户可能会发现，使用相应的15米海洋掩码图像格陵兰冰图项目（GIMP）陆地冰和海洋分类掩码来掩码格陵兰海岸线以外的区域是有帮助的。 SAR数据以20米的分辨率分布。数据通过双线性插值被上采样到15米，以匹配Landsat band-8的分辨率。一般文件

Dataset Availability

1999-06-30T00:00:00 - 2002-09-04T00:00:00

Dataset Provider

NASA NSIDC DAAC at CIRES

Collection Snippet

ee.Image("OSU/GIMP/2000_IMAGERY_MOSAIC")

Bands Table

Name	Description	Resolution	Wavelength
B1	Landsat 7 ETM+ blue	15 meters	0.45 - 0.52 µm
B2	Landsat 7 ETM+ green	15 meters	0.52 - 0.60 µm
B3	Landsat 7 ETM+ red	15 meters	0.63 - 0.69 µm
B4	Landsat 7 ETM+ near infrared	15 meters	0.77 - 0.90 µm
B5	Landsat 7 ETM+ shortwave infrared 1	30 meters	1.55 - 1.75 µm
B6_low_gain	Landsat 7 ETM+ low-gain thermal Infrared 1. This band has expanded dynamic range and lower radiometric resolution (sensitivity), with less saturation at high Digital Number (DN) values. Resampled from 60m to 30m.	30 meters	10.40 - 12.50 µm
B6_high_gain	Landsat 7 ETM+ high-gain thermal Infrared 1. This band has higher radiometric resolution (sensitivity), although it has a more restricted dynamic range. Resampled from 60m to 30m.	30 meters	10.40 - 12.50 µm
B7	Landsat 7 ETM+ shortwave infrared 2	30 meters	2.08 - 2.35 µm
B8	Landsat 7 ETM+ panchromatic	15 meters	0.52 - 0.90 µm
B8_radarsat	RADARSAT-1 synthetic aperture radar amplitude imagery	15 meters

数据引用：

Howat, I.M., A. Negrete, B.E. Smith, 2014, The Greenland Ice Mapping Project (GIMP) land classification and surface elevation datasets, The Cryosphere, 8, 1509-1518, doi:10.5194/tc-8-1509-2014 article pdf

MEaSUREs Greenland Ice Mapping Project (GIMP) 2000 Image Mosaic, Version 1 | National Snow and Ice Data Center

https://doi.org/10.5067/4RNTRRE4JCYD

代码：

var dataset = ee.Image('OSU/GIMP/2000_IMAGERY_MOSAIC');
var greenlandImage = dataset.select(['B3', 'B2', 'B1']);
var visParams = {
  min: 0.0,
  max: 255.0,
};
Map.setCenter(-29.1605, 70.4, 9);
Map.addLayer(greenlandImage, visParams, 'Greenland Pansharpened Image');