GEE数据集——1988—2020年DEA （Digital Earth Australia ）澳大利亚海岸线30米分辨率的土地分类数据集DEA Land Cover 1.0.0

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简介

澳大利亚数字地球（DEA）土地覆被系统采用粮食及农业组织土地覆被分类系统分类法第二版（Di Gregorio 和 Jansen，1998 年；2005 年）为澳大利亚提供年度土地覆被分类。

DEA 土地覆被将 30 多年的卫星图像转化为澳大利亚土地、植被和水体随时间变化的证据。

土地覆被是地球表面观察到的物理覆被，包括树木、灌木、草、土壤、裸露的岩石、水体、种植园、农作物和建筑结构。全澳大利亚一致的土地覆被产品有助于了解环境的不同部分是如何变化和相互关联的。记录一段时间的地球观测数据首先可以观察特定时间的土地覆被状况，其次可以通过不同时间的比较观察土地覆被的变化方式。

如需了解更多信息，请参阅 DEA Landcover Landsat。

该产品是澳大利亚数字地球计划的一部分

数据产品

Catalog Owner

Geoscience Australia

Dataset Availability

1988-01-01T00:00:00Z–2020-01-01T00:00:00Z

Dataset Provider

Geoscience Australia NGIS

Contact

https://www.ga.gov.au/contact-us

Earth Engine Snippet

ee.ImageCollection("projects/geoscience-aus-cat/assets/ga_ls_landcover_class_cyear_2")

Resolution
25 meters

Bands

Name	Units	Min	Max	Description
`baregrad_phy_cat_l4d`		0	15	Bare gradation. Describes the percentage of bare in naturally bare areas.
`canopyco_veg_cat_l4d`		0	16	Vegetation Cover. The measured cover of vegetated areas.
`inttidal_wat_cat_l4a`		0	3	Intertidal. Delineates the intertidal zone.
`level3`		0	220	The base Level 3 land cover classification.
`level3_R`	m	0	255	R band of RGB composite for level 3 data.
`level3_G`	m	0	255	G band of RGB composite for level 3 data.
`level3_B`	m	0	255	B band of RGB composite for level 3 data.
`level4`		0	104	All level 3 and level 4 classes for a given pixel are combined to give a single classification value.
`level4_R`		0	255	R band of RGB composite for level 4 data.
`level4_G`		0	255	G band of RGB composite for level 4 data.
`level4_B`		0	255	B band of RGB composite for level 4 data.
`lifeform_veg_cat_l4a`		0	2	Lifeform. Describes the detail of vegetated classes, separating woody from herbaceous.
`waterper_wat_cat_l4d`		0	9	Water Persistence. Describes the number of months a water body contains water.
`watersea_veg_cat_l4a`		0	7	Water Seasonality. The length of time an aquatic vegetated area was measured as being inundated.
`waterstt_wat_cat_l4a`		0	1	Water State. Describes whether the detected water is snow, ice or liquid water. Only liquid water is described in this release.

baregrad_phy_cat_l4d Class Table

Value	Color	Description
10	#622f22	Sparsely vegetated (< 20 % bare)
12	#5c3317	Very sparsely vegetated (20 to 60 % bare)
15	#804a00	Bare areas, unvegetated (> 60 % bare)

canopyco_veg_cat_l4d Class Table

Value	Color	Description
10	#8fb31d	Closed (>65 %)
12	#b0bf1a	Open (40 to 65 %)
13	#9dc209	Open (15 to 40 %)
15	#77dd77	Sparse (4 to 15 %)
16	#64e986	Scattered (1 to 4 %)

inttidal_wat_cat_l4a Class Table

Value	Color	Description
3	#151b54	Intertidal zone

level3 Class Table

Value	Color	Description
111	#4aa02c	Cultivated Terrestrial Vegetation (CTV)
112	#54c571	(Semi-)Natural Terrestrial Vegetation (NTV)
124	#306eff	Natural Aquatic Vegetation (NAV)
215	#e6e6fa	Artificial Surface (AS)
216	#5c3317	Natural Bare Surface (NS)
220	#0020c2	Water

level4 Class Table

Value	Color	Description
1	#347c17	Cultivated Terrestrial Vegetated
3	#347c17	Cultivated Terrestrial Vegetated: Herbaceous
4	#347c17	Cultivated Terrestrial Vegetated: Closed (> 65 %)
5	#347c17	Cultivated Terrestrial Vegetated: Open (40 to 65 %)
6	#347c17	Cultivated Terrestrial Vegetated: Open (15 to 40 %)
7	#347c17	Cultivated Terrestrial Vegetated: Sparse (4 to 15 %)
8	#347c17	Cultivated Terrestrial Vegetated: Scattered (1 to 4 %)
14	#347c17	Cultivated Terrestrial Vegetated: Herbaceous Closed (> 65 %)
15	#347c17	Cultivated Terrestrial Vegetated: Herbaceous Open (40 to 65 %)
16	#347c17	Cultivated Terrestrial Vegetated: Herbaceous Open (15 to 40 %)
17	#347c17	Cultivated Terrestrial Vegetated: Herbaceous Sparse (4 to 15 %)
18	#347c17	Cultivated Terrestrial Vegetated: Herbaceous Scattered (1 to 4 %)
19	#12ad2b	Natural Terrestrial Vegetated
20	#12ad2b	Natural Terrestrial Vegetated: Woody
21	#12ad2b	Natural Terrestrial Vegetated: Herbaceous
22	#12ad2b	Natural Terrestrial Vegetated: Closed (> 65 %)
23	#12ad2b	Natural Terrestrial Vegetated: Open (40 to 65 %)
24	#12ad2b	Natural Terrestrial Vegetated: Open (15 to 40 %)
25	#12ad2b	Natural Terrestrial Vegetated: Sparse (4 to 15 %)
26	#12ad2b	Natural Terrestrial Vegetated: Scattered (1 to 4 %)
27	#12ad2b	Natural Terrestrial Vegetated: Woody Closed (> 65 %)
28	#12ad2b	Natural Terrestrial Vegetated: Woody Open (40 to 65 %)
29	#12ad2b	Natural Terrestrial Vegetated: Woody Open (15 to 40 %)
30	#12ad2b	Natural Terrestrial Vegetated: Woody Sparse (4 to 15 %)
31	#12ad2b	Natural Terrestrial Vegetated: Woody Scattered (1 to 4 %)
32	#12ad2b	Natural Terrestrial Vegetated: Herbaceous Closed (> 65 %)
33	#12ad2b	Natural Terrestrial Vegetated: Herbaceous Open (40 to 65 %)
34	#12ad2b	Natural Terrestrial Vegetated: Herbaceous Open (15 to 40 %)
35	#12ad2b	Natural Terrestrial Vegetated: Herbaceous Sparse (4 to 15 %)
36	#12ad2b	Natural Terrestrial Vegetated: Herbaceous Scattered (1 to 4 %)
55	#a0d6b4	Natural Aquatic Vegetated
56	#a0d6b4	Natural Aquatic Vegetated: Woody
57	#a0d6b4	Natural Aquatic Vegetated: Herbaceous
58	#a0d6b4	Natural Aquatic Vegetated: Closed (> 65 %)
59	#a0d6b4	Natural Aquatic Vegetated: Open (40 to 65 %)
60	#a0d6b4	Natural Aquatic Vegetated: Open (15 to 40 %)
61	#a0d6b4	Natural Aquatic Vegetated: Sparse (4 to 15 %)
62	#a0d6b4	Natural Aquatic Vegetated: Scattered (1 to 4 %)
63	#a0d6b4	Natural Aquatic Vegetated: Woody Closed (> 65 %)
64	#a0d6b4	Natural Aquatic Vegetated: Woody Closed (> 65 %) Water > 3 months (semi-) permanent
65	#a0d6b4	Natural Aquatic Vegetated: Woody Closed (> 65 %) Water < 3 months (temporary or seasonal)
66	#a0d6b4	Natural Aquatic Vegetated: Woody Open (40 to 65 %)
67	#a0d6b4	Natural Aquatic Vegetated: Woody Open (40 to 65 %) Water > 3 months (semi-) permanent
68	#a0d6b4	Natural Aquatic Vegetated: Woody Open (40 to 65 %) Water < 3 months (temporary or seasonal)
69	#a0d6b4	Natural Aquatic Vegetated: Woody Open (15 to 40 %)
70	#a0d6b4	Natural Aquatic Vegetated: Woody Open (15 to 40 %) Water > 3 months (semi-) permanent
71	#a0d6b4	Natural Aquatic Vegetated: Woody Open (15 to 40 %) Water < 3 months (temporary or seasonal)
72	#a0d6b4	Natural Aquatic Vegetated: Woody Sparse (4 to 15 %)
73	#a0d6b4	Natural Aquatic Vegetated: Woody Sparse (4 to 15 %) Water > 3 months (semi-) permanent
74	#a0d6b4	Natural Aquatic Vegetated: Woody Sparse (4 to 15 %) Water < 3 months (temporary or seasonal)
75	#a0d6b4	Natural Aquatic Vegetated: Woody Scattered (1 to 4 %)
76	#a0d6b4	Natural Aquatic Vegetated: Woody Scattered (1 to 4 %) Water > 3 months (semi-) permanent
77	#a0d6b4	Natural Aquatic Vegetated: Woody Scattered (1 to 4 %) Water < 3 months (temporary or seasonal)
78	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Closed (> 65 %)
79	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Closed (> 65 %) Water > 3 months (semi-) permanent
80	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Closed (> 65 %) Water < 3 months (temporary or seasonal)
81	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Open (40 to 65 %)
82	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Open (40 to 65 %) Water > 3 months (semi-) permanent
83	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Open (40 to 65 %) Water < 3 months (temporary or seasonal)
84	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Open (15 to 40 %)
85	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Open (15 to 40 %) Water > 3 months (semi-) permanent
86	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Open (15 to 40 %) Water < 3 months (temporary or seasonal)
87	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Sparse (4 to 15 %)
88	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Sparse (4 to 15 %) Water > 3 months (semi-) permanent
89	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Sparse (4 to 15 %) Water < 3 months (temporary or seasonal)
90	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Scattered (1 to 4 %)
91	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Scattered (1 to 4 %) Water > 3 months (semi-) permanent
92	#a0d6b4	Natural Aquatic Vegetated: Herbaceous Scattered (1 to 4 %) Water < 3 months (temporary or seasonal)
93	#e6e6fa	Artificial Surface
94	#4b5320	Natural Surface
95	#4b5320	Natural Surface: Sparsely vegetated
96	#4b5320	Natural Surface: Very sparsely vegetated
97	#4b5320	Natural Surface: Bare areas, unvegetated
98	#3bb9ff	Water
99	#3bb9ff	Water: (Water)
100	#3bb9ff	Water: (Water) Tidal area
101	#3bb9ff	Water: (Water) Perennial (> 9 months)
102	#3bb9ff	Water: (Water) Non-perennial (7 to 9 months)
103	#3bb9ff	Water: (Water) Non-perennial (4 to 6 months)
104	#3bb9ff	Water: (Water) Non-perennial (1 to 3 months)

lifeform_veg_cat_l4a Class Table

Value	Color	Description
1	#808000	Woody (trees, shrubs)
2	#848b79	Herbaceous (grasses, forbs)

waterper_wat_cat_l4d Class Table

Value	Color	Description
1	#357ec7	> 9 months
7	#6495ed	7-9 months
8	#5cb3ff	4-6 months
9	#87ceeb	1-3 months

watersea_veg_cat_l4a Class Table

Value	Color	Description
1	#357ec7	Semi-permanent or permanent (> 3 months)
7	#00bfff	Temporary or seasonal (< 3 months)

waterstt_wat_cat_l4a Class Table

Value	Color	Description
1	#357ec7	Water

代码

var landcover = ee.ImageCollection('projects/geoscience-aus-cat/assets/ga_ls_landcover_class_cyear_2');

var visualization = {
  bands: ['level4_R', 'level4_G', 'level4_B']
};

var lon = 122.41280;
var lat = -18.06402;

Map.setCenter(lon, lat, 10);

// Degrees in EPSG:3857.
var delta = 0.25;

var areaOfInterest = ee.Geometry.Rectangle(
  [lon - delta, lat - delta, lon + delta, lat + delta], null, false);

var image = landcover.filterDate('1995-01-01', '1996-01-01')
                     .filterBounds(areaOfInterest);
                  
Map.addLayer(image, visualization, 'Land Cover');

结果

GEE数据集——1988—2020年DEA （Digital Earth Australia ）澳大利亚海岸线30米分辨率的土地分类数据集DEA Land Cover 1.0.0_javascript

GEE数据集——1988—2020年DEA （Digital Earth Australia ）澳大利亚海岸线30米分辨率的土地分类数据集DEA Land Cover 1.0.0_javascript_02

引用

Lucas R, Mueller N, Siggins A, Owers C, Clewley D, Bunting P, Kooymans C, Tissott B, Lewis B, Lymburner L, Metternicht G. Land Cover Mapping using Digital Earth Australia. Data. 2019; 4(4):143. doi:10.3390/data4040143. Christopher J. Owers, Richard M. Lucas, Daniel Clewley, Carole Planque, Suvarna Punalekar, Belle Tissott, Sean M. T. Chua, Pete Bunting, Norman Mueller & Graciela Metternicht (2021) Living Earth: Implementing national standardised land cover classification systems for Earth Observation in support of sustainable development, Big Earth Data, 5:3, 368-390. doi:10.1080/20964471.2021.1948179.