The DOPA computes global land cover statistics and land cover change statistics at the country, ecoregion and protected area levels for the epochs 1995, 2000, 2005, 2010, 2015 and with a resolution of 300m

For this purpose, we use the following datasets



The core Land Cover Classification System (LCCS) proposed is developed by the United Nations (UN) Food and Agriculture Organization (FAO) and is given hereafter:

cat_value
value_description
R
G
B
0
No data
0
0
0
10
Cropland, rainfed
255
255
100
11
Herbaceous cover
255
255
100
12
Tree or shrub cover
255
255
0
20
Cropland, irrigated or post-flooding
170
240
240
30
Mosaic cropland (>50%) / natural vegetation (tree, shrub, herbaceous cover) (<50%)
220
240
100
40
Mosaic natural vegetation (tree, shrub, herbaceous cover) (>50%) / cropland (<50%)
200
200
100
50
Tree cover, broadleaved, evergreen, closed to open (>15%)
0
100
0
60
Tree cover, broadleaved, deciduous, closed to open (>15%)
0
160
0
61
Tree cover, broadleaved, deciduous, closed (>40%)
0
160
0
62
Tree cover, broadleaved, deciduous, open (15-40%)
170
200
0
70
Tree cover, needleleaved, evergreen, closed to open (>15%)
0
60
0
71
Tree cover, needleleaved, evergreen, closed (>40%)
0
60
0
72
Tree cover, needleleaved, evergreen, open (15-40%)
0
80
0
80
Tree cover, needleleaved, deciduous, closed to open (>15%)
40
80
0
81
Tree cover, needleleaved, deciduous, closed (>40%)
40
80
0
82
Tree cover, needleleaved, deciduous, open (15-40%)
40
100
0
90
Tree cover, mixed leaf type (broadleaved and needleleaved)
120
130
0
100
Mosaic tree and shrub (>50%) / herbaceous cover (<50%)
140
160
0
110
Mosaic herbaceous cover (>50%) / tree and shrub (<50%)
190
150
0
120
Shrubland
150
100
0
121
Shrubland evergreen
120
75
0
122
Shrubland deciduous
150
100
0
130
Grassland
255
180
50
140
Lichens and mosses
255
220
210
150
Sparse vegetation (tree, shrub, herbaceous cover) (<15%)
255
235
175
151
Sparse tree (<15%)
255
200
100
152
Sparse shrub (<15%)
255
210
120
153
Sparse herbaceous cover (<15%)
255
235
175
160
Tree cover, flooded, fresh or brakish water
0
120
90
170
Tree cover, flooded, saline water
0
150
120
180
Shrub or herbaceous cover, flooded, fresh/saline/brakish water
0
220
130
190
Urban areas
195
20
0
200
Bare areas
255
245
215
201
Consolidated bare areas
220
220
220
202
Unconsolidated bare areas
255
245
215
210
Water bodies
0
70
200
220
Permanent snow and ice
255
255
255

Aggregation levels

Using expert's knowledge, we further used 3 aggregation levels the above classes in the following way to ease the interpretation of the main changes. The lowest aggregation level (3) corresponds to the original 22 global classes. The second one (level 2) shows 14 classes and the last one (level 1) covers only 4 classes. The aggregation rules are given hereafter.

lc1_code
lc1
lc2_code
lc2
lc3_code
lc3
lc_code
1
Natural / semi-natural land
1
Tree cover
1
Tree cover, broadleaved, evergreen, closed to open (>15%)
50
1
Natural / semi-natural land
1
Tree cover
2
Tree cover, broadleaved, deciduous, closed to open (>15%)
62
1
Natural / semi-natural land
1
Tree cover
2
Tree cover, broadleaved, deciduous, closed to open (>15%)
61
1
Natural / semi-natural land
1
Tree cover
2
Tree cover, broadleaved, deciduous, closed to open (>15%)
60
1
Natural / semi-natural land
1
Tree cover
3
Tree cover, needleleaved, evergreen, closed to open (>15%)
72
1
Natural / semi-natural land
1
Tree cover
3
Tree cover, needleleaved, evergreen, closed to open (>15%)
71
1
Natural / semi-natural land
1
Tree cover
3
Tree cover, needleleaved, evergreen, closed to open (>15%)
70
1
Natural / semi-natural land
1
Tree cover
4
Tree cover, needleleaved, deciduous, closed to open (>15%)
82
1
Natural / semi-natural land
1
Tree cover
4
Tree cover, needleleaved, deciduous, closed to open (>15%)
81
1
Natural / semi-natural land
1
Tree cover
4
Tree cover, needleleaved, deciduous, closed to open (>15%)
80
1
Natural / semi-natural land
1
Tree cover
5
Tree cover, mixed leaf type (broadleaved and needleleaved)
90
1
Natural / semi-natural land
2
Shrubland
6
Shrubland
122
1
Natural / semi-natural land
2
Shrubland
6
Shrubland
121
1
Natural / semi-natural land
2
Shrubland
6
Shrubland
120
1
Natural / semi-natural land
3
Grassland
7
Grassland
130
1
Natural / semi-natural land
4
Lichens and mosses
8
Lichens and mosses
140
1
Natural / semi-natural land
5
Mosaic tree, shrub and herbaceous cover
9
Mosaic tree and shrub (>50%) / herbaceous cover (<50%)
100
1
Natural / semi-natural land
5
Mosaic tree, shrub and herbaceous cover
10
Mosaic herbaceous cover (>50%) / tree and shrub (<50%)
110
1
Natural / semi-natural land
6
Sparse vegetation
11
Sparse vegetation (tree, shrub, herbaceous cover) (<15%)
153
1
Natural / semi-natural land
6
Sparse vegetation
11
Sparse vegetation (tree, shrub, herbaceous cover) (<15%)
152
1
Natural / semi-natural land
6
Sparse vegetation
11
Sparse vegetation (tree, shrub, herbaceous cover) (<15%)
151
1
Natural / semi-natural land
6
Sparse vegetation
11
Sparse vegetation (tree, shrub, herbaceous cover) (<15%)
150
1
Natural / semi-natural land
7
Bare areas
12
Bare areas
202
1
Natural / semi-natural land
7
Bare areas
12
Bare areas
201
1
Natural / semi-natural land
7
Bare areas
12
Bare areas
200
1
Natural / semi-natural land
8
Wetland, tree cover
13
Tree cover, flooded, fresh water
160
1
Natural / semi-natural land
8
Wetland, tree cover
14
Tree cover, flooded, saline water or brackish water
170
1
Natural / semi-natural land
9
Wetlands, shrub or herbaceous cover
15
Shrub or herbaceous cover, flooded, fresh/saline/brackish water
180
2
Mosaic natural / managed land
10
Mosaic natural vegetation / cropland
16
Mosaic natural vegetation (tree, shrub, herbaceous cover) (>50%) / cropland (<50%)
40
2
Mosaic natural / managed land
10
Mosaic natural vegetation / cropland
17
Mosaic cropland (>50%) / natural vegetation (tree, shrub, herbaceous cover) (<50%)
30
3
Cultivated / managed land
11
Cropland
18
Cropland, rainfed
12
3
Cultivated / managed land
11
Cropland
18
Cropland, rainfed
11
3
Cultivated / managed land
11
Cropland
18
Cropland, rainfed
10
3
Cultivated / managed land
11
Cropland
19
Cropland, irrigated or post-flooding
20
3
Cultivated / managed land
12
Urban areas
20
Urban areas
190
4
Water / snow and ice
13
Water bodies
21
Water bodies
210
4
Water / snow and ice
14
Permanent snow and ice
22
Permanent snow and ice
220


We use two main scripts to process the data.
  1. esa_script1.sh creates GRASS Location (ESA) based on sampled dataset (ESA LC) with following parameters:
    • EPSG 4326
    • 90,-90, -180, 180
    • e-w resol: 0:00:10
    • n-s resol: 0:00:10
    • cols: 129600
    • rows: 64800
  2. the second script (esa_script2.sh) executes GRASS commands performing the following tasks
    1. create mapsets
    2. allows access to all mapsets
    3. import LC (epochs 1995,2000,2005,2010,2015) in ESALC_1995_2015 mapset
      • assign categories and colors the the imported maps
    4. create LC1 maps as reclass of epoch 1995 and 2015 according to the aggregation level shown above
      • assign categories and colors the the reclassed maps
    5. import WDPA FLAT (six slices) in WDPA mapset (to be updated for each run)
      • patch the six slices in one real global map
      • assign NULL value to 0 value cells; assign category and color to flat WDPA
      • delete the temporay slices of WDPA
    6. Create a GRASS/POSTGIS connection within the mapset POSTGIS