Global Flood Database (GFD)
Global Flood Database(GFD) combines over several years of flood data to create the first comprehensive satellite based resource for global flood risk management and mitigation.
Collection: gfd-events
A STAC collection hold all the GFD events.
- Name: Global Flood Database (GFD)
- Code: GFD
- Source organization:
- Source code:
- Source Type:
- Source organization email: support@floodbase.com
- Source URL: https://global-flood-database.cloudtostreet.ai/
- Source Data License: UNKNOWN
-
Source for: event, hazard, impact
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previous implementation (R): https://github.com/IFRCGo/GCDB/blob/main/RCode/MainlyHazardData/GetGFD.R
Data
The GFD data which is related to Flood is accessible using the Google Earth Engine library. The Image Collection which contains Flood related data is GLOBAL_FLOOD_DB/MODIS_EVENTS/V1.
Event Item
A GFD event will always produce an Event STAC Item. Here is a table with the fields that are mapped from the GFD event to the STAC event:
| STAC field | GFD Field | Description |
|---|---|---|
| id | id | Unique Identifier |
| geometry | system:footprint | The data from GFD field type gives LinearRing which is not supported, so, the geometry is constructed by converting the data to type Polygon. |
| collection | gfd-events |
|
| bbox | coordinates from system:footprint |
Max and min latitude and longitude are calculated from the coordinates from system:footprint |
| title | dfo_main_cause | |
| description | dfo_main_cause | |
| datetime | system:time_start | |
| monty:country_codes | cc | Split the cc field to get the list of iso3 |
| monty:hazard_codes | List of hazard codes converted following the mapping | Default value is FL as GFD is a flood related source. |
Hazard Item
A GFD event and episode will ALWAYS produce one hazard STAC item. Here is a table with the STAC fields that are mapped from the GFD event to the STAC hazad.
| STAC field | GFD Field | Description |
|---|---|---|
| id | id | Unique Identifier |
| geometry | system:footprint | The data from GFD field type gives LinearRing which is not supported, so, the geometry is constructed by converting the data to type Polygon. |
| collection | gfd-hazards |
|
| bbox | coordinates from system:footprint |
Max and min latitude and longitude are calculated from the coordinates from system:footprint |
| title | dfo_main_cause | |
| description | dfo_main_cause | |
| datetime | system:time_start | |
| monty:country_codes | cc | Split the cc field to get the list of iso3 |
| monty:hazard_codes | List of hazard codes converted following the mapping | Default value is FL as GFD is a flood related source. |
| monty:hazard_detail | Hazard detail based on dfo_severity | Detailed description of the hazard |
Hazard Detail
The hazard_detail is constructed using the following fields.
| STAC field | GFD Field | Description |
|---|---|---|
| severity_value | dfo_severity | Alert Score |
| severity_unit | GFD Flood Severity Score | Alert level |
Impact Item
According to the event type and the fields available in the GFD event, one or more Impact STAC Items can be created. The following sections describe the mapping of specific GFD event information to the STAC impact item.
| STAC field | GFD Field | Description |
|---|---|---|
| id | id | Unique Identifier |
| geometry | system:footprint | The data from GFD field type gives LinearRing which is not supported, so, the geometry is constructed by converting the data to type Polygon. |
| collection | gfd-impacts |
|
| bbox | coordinates from system:footprint |
Max and min latitude and longitude are calculated from the coordinates from system:footprint |
| title | dfo_main_cause | |
| description | dfo_main_cause | |
| datetime | system:time_start | |
| monty:country_codes | cc |
Split the cc field to get the list of iso3 |
| monty:hazard_codes | List of hazard codes converted following the mapping | Default value is FL as GFD is a flood related source. |
| monty:impact_detail | Impact items using dfo_dead, dfo_displaced fields | Several impact items are created based on dfo_dead, dfo_displaced fields |
Impact Details
The following fields are used to create several Impact Detail items. 1. DEATHS
| STAC Field | GFD Field | Description |
|---|---|---|
| category | MontyImpactExposureCategory.ALL_PEOPLE | |
| type | MontyImpactType.DEATH | |
| value | value from dfo_dead | Get the value using the key dfo_dead |
| unit | count | |
| estimate_type | MontyEstimateType.PRIMARY |
- DISPLACED
| STAC Field | GFD Field | Description |
|---|---|---|
| category | MontyImpactExposureCategory.ALL_PEOPLE | |
| type | MontyImpactType.TOTAL_DISPLACED_PERSONS | |
| value | value from dfo_displaced | Get the value using the key dfo_displaced |
| unit | count | |
| estimate_type | MontyEstimateType.PRIMARY |