Google Earth Engine ——世界200000冰川面积、几何形状、表面速度和雪线高程2017年数据集

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发布于 2024-02-02 09:04:27

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发布于 2024-02-02 09:04:27

Global Land Ice Measurements from Space (GLIMS) is an international initiative with the goal of repeatedly surveying the world's estimated 200,000 glaciers.

The project seeks to create a globally comprehensive inventory of land ice, including measurements of glacier area, geometry, surface velocity, and snow line elevation. To perform these analyses, the GLIMS project uses satellite data, primarily from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and the Landsat Enhanced Thematic Mapper Plus (ETM+), as well as historical information derived from maps and aerial photographs.

Each feature in this dataset is a polygonal boundary of a glacier at the time of analysis. A few glacier IDs have hundreds of distinct rows over time.

This dataset is a snapshot of the inventory of glacier boundaries as of October 27, 2017, providing over 690,000 rows.

该数据集是截至 2017 年 10 月 27 日冰川边界清单的快照，提供超过 690,000 景。

Dataset Availability

1992-06-01T00:00:00 - 2017-08-01T00:00:00

Dataset Provider

National Snow and Ice Data Center (NSDIC)

Collection Snippet

ee.FeatureCollection("GLIMS/20171027")

Name	Type	Description
analysts	String	Name(s) of data contributor(s)
anlys_id	Double	ID of a glacier at a particular time
anlys_time	String	When the analysis was done
area	Double	Area of the glacier in the plane of the map projection in square kilometers
chief_affl	String	Affiliation of the chief of the regional center
db_area	Double	Same as 'area', but recomputed by the GLIMS project
geog_area	String	Name of geographic region covered by the regional center
glac_id	String	The GLIMS glacier ID
glac_name	String	The glacier name. ~80% of the rows equal 'None'
glac_stat	String	Glacier status, either 'exists' or 'None'
length	Double	Length of the glacier perimeter in meters
line_type	String	Glacier record type, e.g. 'glac_bound' for glaciers, or other values for internal rocks, snowlines, water features, etc.
local_id	String	ID assigned by the contributing institution or regional center
max_elev	Double	Highest part of the glacier, in meters above sea level
mean_elev	Double	Mean elevation of the glacier, in meters above sea level
min_elev	Double	Lowest part of the glacier, in meters above sea level
parent_id	String	ID of the glacier that is the parent of this glacier
primeclass	Double	WGMS glacier classification number
proc_desc	String	Description of processing done on this record
rc_id	Double	ID used by the regional center
rec_status	String	Record status
release_dt	String	Date data was released, in YYYY-MM-ddTHH:mm:ss format
src_date	String	Date of source imagery used to create the outline
subm_id	Double	The submission ID assigned by GLIMS
submitters	String	Name(s) of data submitter(s)
wgms_id	String	World Glacier Monitoring Service ID
width	Double	Width of the glacier in meters

数据引用：

For the creation of any reports, publications, new data sets, derived products, or services resulting from the data set, users should cite: GLIMS and NSIDC (2005, updated 2013): Global Land Ice Measurements from Space glacier database. Compiled and made available by the international GLIMS community and the National Snow and Ice Data Center, Boulder CO, U.S.A., doi:10.7265/N5V98602

https://doi.org/10.7265/N5V98602

代码：

var dataset = ee.FeatureCollection('GLIMS/20171027');
var visParams = {
  palette: ['gray', 'cyan', 'blue'],
  min: 0.0,
  max: 10.0,
  opacity: 0.8,
};
var image = ee.Image().float().paint(dataset, 'area');
Map.setCenter(-35.618, 66.743, 7);
Map.addLayer(image, visParams, 'GLIMS/20171027');
Map.addLayer(dataset, null, 'for Inspector', false);

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原始发表：2024-02-01，如有侵权请联系 cloudcommunity@tencent.com 删除

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