IEEE Geoscience and Remote Sensing Magazine - March 2023 - 107

with a shape of 1,920 × 1,920 pixels. A sample image from
the dataset is given in Figure 1.
QUALITY ASSESSMENT AND STATISTICS
With the intention of further improving the usability of
the dataset, we conduct a quality assessment of the Sentinel-2
seasons. First, an evaluation platform is prepared
and shared with many RS experts. The participants are
then asked to annotate the informativeness of each Sentinel-2
season. Next, by performing a statistical analysis that
takes the percentage of the votes, we 1) discard the patches
with a discard score of higher than 50%, 2) assign a quality
score between 0 and 10 to each season, and 3) calculate
the single temporal subset of each season using the quality
scores calculated in the previous step. In cases where several
seasons are assigned with the same quality score, we favor
the season summer over the other seasons. In addition to
the single temporal subsets, we also make the quality scores
publicly available, which can be used to form case-specific
single temporal subsets.
With this quality assessment, we not only refine the dataset
and remove noninformative patches, but also boost
the versatility of the dataset by generating quality scores
and single temporal subset seasons assigned to each season
and patch, respectively. We advise the researchers to make
use of the single temporal subset seasons defined for each
GEE Collections
S2_L2A
S1_GRD
WDPA
WorldCover
VIIRS
.clip()
.clip()
Filtering
IW
VV + VH
Filtering the
Date
Ascending +
Descending
Binary Mask
Encoded With 1, 2,
and 3 Pixel
Values for
WDPA Categories
Ia, Ib, and II.
.toByte()
.toByte()
.clip()
.clip()
Northern
Hemisphere
Southern
Hemisphere
Winter
Spring
Summer
Autumn
('2019-12-01', '2020-02-28')
('2020-03-01', '2020-05-30')
('2020-06-01', '2020-08-31')
('2020-09-01', '2020-11-30')
Summer
Autumn
Winter
Spring
Coregistration
Percentile
Composite
Export
FIGURE 2. Curation workflow: querying and filtering the geodata sources in the MapInWild dataset. L2A: Level-2A;
GRD: ground range distance.
MARCH 2023 IEEE GEOSCIENCE AND REMOTE SENSING MAGAZINE
107

IEEE Geoscience and Remote Sensing Magazine - March 2023

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