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license: mit |
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--- |
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# Flood Detection Dataset |
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## Overview |
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This repository contains model output parquet files and geotiffs from our flood detection research. The data is organized in 3° × 3° tiles, with each tile containing both tabular data and processed geotiff images. |
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## Directory Structure |
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``` |
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├── N27 # Main directory by latitude |
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│ ├── N27E030 # Subdirectory for specific tile |
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│ │ ├── N27E030.parquet # Tabular data |
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│ │ ├── N27E030_90m.tif # Geotiff with 90m buffer |
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│ │ └── N27E030_240m.tif # Geotiff with 240m buffer |
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``` |
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The naming convention uses the southwest corner coordinates of each tile. For example, `N27E030` represents: |
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- Latitude: 27°N to 30°N |
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- Longitude: 30°E to 33°E |
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## Schema |
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| Column | Type | Description | |
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|--------|------|-------------| |
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| year | int | Year of observation | |
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| month | int | Month of observation | |
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| day | int | Day of observation | |
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| lat | float | Latitude of potential flood detection (pixel center) | |
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| lon | float | Longitude of potential flood detection (pixel center) | |
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| filename | str | Corresponding Sentinel-1 file name | |
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| land_cover | int | ESA WorldCover land cover classification | |
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| dem_metric_1 | float | Individual pixel slope | |
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| dem_metric_2 | float | Maximum slope within 240m | |
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| soil_moisture | float | LPRM algorithm absolute soil moisture (%) | |
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| soil_moisture_zscore | float | Soil moisture anomaly (Oct 2014-Sep 2024 baseline) | |
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| soil_moisture_sca | float | SCA algorithm absolute soil moisture (%) | |
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| soil_moisture_sca_zscore | float | SCA soil moisture anomaly (Oct 2014-Sep 2024 baseline) | |
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| temp | float | Average daily minimum temperature (1991-2020 climate) | |
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| edge_false_positives | int | Edge effect detection flag | |
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## Recommended Filtering |
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For optimal results, we recommend applying the following filters: |
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```python |
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filters = { |
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'dem_metric_2': '< 10', |
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'soil_moisture_sca': '> 1', |
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'soil_moisture_zscore': '> 1', |
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'soil_moisture': '> 20', |
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'temp': '> 0', |
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'land_cover': '!= 60', # exclude bare ground |
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'edge_false_positives': '= 0' |
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} |
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``` |
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## Spatial Resolution |
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- Current Status (Oct 31, 2024): |
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- Africa and South America: 20-meter resolution |
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- Rest of world: 30-meter resolution (20-meter update expected later this year) |
