Tsinghua FROM-GLC year of change to impervious surface

Tsinghua/FROM-GLC/GAIA/v10
Dataset Availability
1985-01-01T00:00:00 - 2018-12-31T00:00:00
Dataset Provider
Earth Engine Snippet
ee.Image("Tsinghua/FROM-GLC/GAIA/v10")
Tags
impervious urban development built tsinghua

Description

This dataset contains annual change information of global impervious surface area from 1985 to 2018 at a 30m resolution. Change from pervious to impervious was determined using a combined approach of supervised classification and temporal consistency checking. Impervious pixels are defined as above 50% impervious. The year of the transition (from pervious to impervious) can be identified from the pixel value, ranging from 34 (year: 1985) to 1 (year: 2018). For example, the impervious surface in 1990 can be revealed as the pixel value greater than 29 (see the lookup table). This dataset is temporally consistent, following the conversion from pervious (e.g., non-urban) to impervious (e.g., urban) monotonically. For more information about the mapping approach and assessment, see https://doi.org/10.1016/j.rse.2019.111510.

Bands

Resolution
30 meters

Bands

Name Min Max Description
change_year_index 1* 34*

Year of the transition from from pervious to impervious. From 34 (year: 1985) to 1 (year: 2018)

* estimated min or max value

change_year_index Class Table

Value Color Description
1 014352 2018
2 1A492C 2017
3 071EC4 2016
4 B5CA36 2015
5 729EAC 2014
6 8EA5DE 2013
7 818991 2012
8 62A3C3 2011
9 CCF4FE 2010
10 74F0B9 2009
11 32BC55 2008
12 C72144 2007
13 56613B 2006
14 C14683 2005
15 C31C25 2004
16 5F6253 2003
17 11BF85 2002
18 A61B26 2001
19 99FBC5” 2000
20 188AAA 1999
21 C2D7F1 1998
22 B7D9D8 1997
23 856F96 1996
24 109C6B 1995
25 2DE3F4 1994
26 9A777D 1993
27 151796 1992
28 C033D8 1991
29 510037 1990
30 640C21 1989
31 31A191 1988
32 223AB0 1987
33 B692AC 1986
34 2DE3F4 1985

Terms of Use

Terms of Use

This work is licensed under a Creative Commons Attribution 4.0 International License. https://creativecommons.org/licenses/by/4.0/

Citations

Citations:
  • Gong, P., Li, X., Wang, J., Bai, Y., Chen, B., Hu, T., ... & Zhou, Y. (2020). Annual maps of global artificial impervious area (GAIA) between 1985 and 2018. Remote Sensing of Environment, 236, 111510.

Explore in Earth Engine

var dataset = ee.Image("Tsinghua/FROM-GLC/GAIA/v10");

var visualization = {
  bands: ['change_year_index'],
  min: 0.0,
  max: 34.0,
  palette: [
    "014352","1A492C","071EC4","B5CA36","729EAC","8EA5DE",
    "818991","62A3C3","CCF4FE","74F0B9","32BC55","C72144",
    "56613B","C14683","C31C25","5F6253","11BF85","A61B26",
    "99FBC5","188AAA","C2D7F1","B7D9D8","856F96","109C6B",
    "2DE3F4","9A777D","151796","C033D8","510037","640C21",
    "31A191","223AB0","B692AC","2DE3F4",
  ]
};

Map.setCenter(-37.62, 25.8, 2);

Map.addLayer(dataset, visualization, "Change year index");