Table 2 The summary of the feature candidates for cropland mask generation.
From: The 10-m crop type maps in Northeast China during 2017–2019
Group | Periods | Proxies | Metrics | # of features |
|---|---|---|---|---|
Seasonal metrics | seeding stage, growth stage, harvest stage | RE2, SWIR1, SWIR2, NDVI, EVI, LSWI, NDSVI, NDTI, RENDVI, REP | median | 30 (10 proxies /stage × 3 stages) |
Annual metrics | growing season | RE2, SWIR1, SWIR2, NDVI, EVI, LSWI, NDSVI, NDTI, RENDVI, REP | min, max, mean, std, amplitude, and 5/25/50/75/95th percentile | 100 (10 proxies /metric × 10 metrics) |
Texture measures | seeding stage, growth stage, harvest stage | NDVI | gray-level co-occurrence matrix | 54 (18 metrics/stage × 3 stages) |
