# Source: Deltares Global Flood Maps
# Type: cog
# Catalog: STACConnector
# Generated by: folia catalog import
# Generated at: 2026-02-08T00:49:06.836016+00:00
#
# Do not edit manually - will be overwritten on next import.

source:
  id: planetary-computer-deltares-floods
  name: Deltares Global Flood Maps
  type: cog
  url: https://planetarycomputer.microsoft.com/api/stac/v1/collections/deltares-floods
  description: '[Deltares](https://www.deltares.nl/en/) has produced inundation maps
    of flood depth using a model that takes into account water level attenuation and
    is forced by sea level. At the coastline, the model is forced by extreme water
    levels containing surge and tide from GTSMip6. The water level at the coastline
    is extended landwards to all areas that are hydrodynamically connected to the
    coast following a ‘bathtub’ like approach and calculates the flood depth as the
    difference between the water level and the topography. Unlike a simple ''bathtub''
    model, this model attenuates the water level over land with a maximum attenuation
    factor of 0.5 m km-1. The attenuation factor simulates the dampening of the flood
    levels due to the roughness over land.


    In its current version, the model does not account for varying roughness over
    land and permanent water bodies such as rivers and lakes, and it does not account
    for the compound effects of waves, rainfall, and river discharge on coastal flooding.
    It also does not include the mitigating effect of coastal flood protection. Flood
    extents must thus be interpreted as the area that is potentially exposed to flooding
    without coastal protection.


    See the complete [methodology documentation](https://ai4edatasetspublicassets.blob.core.windows.net/assets/aod_docs/11206409-003-ZWS-0003_v0.1-Planetary-Computer-Deltares-global-flood-docs.pdf)
    for more information.


    ## Digital elevation models (DEMs)


    This documentation will refer to three DEMs:


    * `NASADEM` is the SRTM-derived [NASADEM](https://planetarycomputer.microsoft.com/dataset/nasadem)
    product.

    * `MERITDEM` is the [Multi-Error-Removed Improved Terrain DEM](http://hydro.iis.u-tokyo.ac.jp/~yamadai/MERIT_DEM/),
    derived from SRTM and AW3D.

    * `LIDAR` is the [Global LiDAR Lowland DTM (GLL_DTM_v1)](https://data.mendeley.com/datasets/v5x4vpnzds/1).


    ## Global datasets


    This collection includes multiple global flood datasets derived from three different
    DEMs (`NASA`, `MERIT`, and `LIDAR`) and at different resolutions. Not all DEMs
    have all resolutions:


    * `NASADEM` and `MERITDEM` are available at `90m` and `1km` resolutions

    * `LIDAR` is available at `5km` resolution


    ## Historic event datasets


    This collection also includes historical storm event data files that follow similar
    DEM and resolution conventions. Not all storms events are available for each DEM
    and resolution combination, but generally follow the format of:


    `events/[DEM]_[resolution]-wm_final/[storm_name]_[event_year]_masked.nc`


    For example, a flood map for the MERITDEM-derived 90m flood data for the "Omar"
    storm in 2008 is available at:


    <https://deltaresfloodssa.blob.core.windows.net/floods/v2021.06/events/MERITDEM_90m-wm_final/Omar_2008_masked.nc>


    ## Contact


    For questions about this dataset, contact [`aiforearthdatasets@microsoft.com`](mailto:aiforearthdatasets@microsoft.com?subject=deltares-floods%20question).'
  provider: Deltares
  license: CDLA-Permissive-1.0
  metadata:
    stac: true
    stac_api: true
    connector_id: planetary-computer
    tags:
    - Deltares
    - Flood
    - Sea level rise
    - Water
    - Global
    dataset:
      tier: 2
      thematic_group: Hydrology & Water
      format: raster
      crs: EPSG:4326
      temporal:
        range: 2018-01-01/2018-12-31
        type: snapshot
        default_range: latest
      quality:
        coverage: global
      layout:
        type: tiled
      stac_collection_id: deltares-floods
      homepage: https://planetarycomputer.microsoft.com/api/stac/v1/collections/deltares-floods