Global Flood Map

The first global flood map to provide risk professionals with all perils and climate options

Fathom's Global Flood Map
Fathom's Global Flood Map - Pakistan flood simulation

Fathom’s award-winning Global Flood Map provides its users with the most robust and comprehensive set of hazard data and flood risk information in the world. Available across all major flood perils: pluvial, fluvial and coastal, it revolutionizes how insurers, financial markets, engineers, corporates and governments can understand and integrate flood hazard and climate change data into their risk operations.

Key features of Fathom’s Global Flood Map

01

~30-meter resolution globally

1 arcsecond data, based on FABDEM+, our latest complete map of the Earth’s terrain

Downscaled to 10-meter resolution where advanced regional data permits

02

Climate Dynamics

Fully flexible climate conditioned flood hazard data for any projected combination of future year and climate scenario up to 2100

Learn more about Climate Dynamics here

03

Multi-peril flood layers

Fluvial, pluvial and coastal flooding – Assess the risk from major types of flood including defended and undefended views.  With flood depths for return periods between 5 – 1000 years and Risk Scores (Relative Risk and Risk Category) for each type of flooding

04

Terrain data

Underpinned by an unparalleled Digital Elevation Model (DEM) combining FABDEM with the best available local LiDAR data

Learn more about our Global Terrain Data

05

Access

Gain instant on-demand access via the Fathom API and Fathom Portal, or host the data on-premise 

Discover Fathom’s access options 

06

Metadata

Providing transparency with additional information within our maps to provide you with a better understanding of the influencing factors that may impact the certainty of flood risks, across all flood perils.

Learn more in our Metadata product briefing

Flood map regional enhancements

Fathom has built a consistent hazard map at 30-meter globally. Where enhanced regional data is available, Fathom has provided regional updates that incorporate improved observational records, defense and terrain data. Browse the map to learn more.
  • Regional Enhancements
  • Global Flood Map
  • No coverage

Global Flood Map

Key features

01~30-meter resolution globally

02 – Climate Dynamics
Flood hazard data for any projected combination of future year and climate scenario

03 – Fluvial, pluvial and coastal flooding

04 – Terrain data
Blending FABDEM with the best available local data

05 – Access
Instant on-demand access to all of Fathom’s data

06 – Flood layers
Available as either Depths (by return periods) or Risk Scores

US Flood Map

Key features

01 – Climate Dynamics
Updated 2020 climate state

02 – 10 return periods
Ranging from 1-in-5 year to 1-in-1000 year

03 – Coverage
Fathom covers 100% of contiguous US
FEMA covers 60% of contiguous US

04 – Inland flooding 

05 – Access
Via the Fathom API, Fathom Portal, direct provision or via a partner

06 – ~10 meter resolution

arrow light short rightFathom’s US Flood Map

UK Flood Map

Key features

01 – Climate Dynamics
5 climate scenarios across 3 time horizons

02 – 10 return periods
Ranging from 1-in-5 year to 1-in-1000 year

03 – Defenses
Unique detection algorithm that identifies flood defenses where data are not available

04 – Inland and coastal flooding 

05 – Access
Via the Fathom API, Fathom Portal, direct provision or via a partner

06 – ~10 meter resolution

arrow light short rightFathom’s UK Flood Map

Japan Flood Map

Key features

01 – ~10 meter resolution

02 Climate Dynamics
5 climate scenarios across 3 time horizons

03 Inland and coastal flooding 

04 – 11 return periods
Ranging from 1-in-5 year to 1-in-2500 year

05 – Access
Via the Fathom API, Fathom Portal, direct provision or via a partner

05 – Defenses
Flood defenses are explicitly built-in using a new levee detection algorithm

arrow light short rightDiscover Fathom’s Japan Flood Map

Key features

01~30-meter resolution globally

02 – Climate Dynamics
Flood hazard data for any projected combination of future year and climate scenario

03 – Fluvial, pluvial and coastal flooding

04 – Terrain data
Blending FABDEM with the best available local data

05 – Access
Instant on-demand access to all of Fathom’s data

06 – Flood layers
Available as either Depths (by return periods) or Risk Scores

Map of USA

Key features

01 – Climate Dynamics
Updated 2020 climate state

02 – 10 return periods
Ranging from 1-in-5 year to 1-in-1000 year

03 – Coverage
Fathom covers 100% of contiguous US
FEMA covers 60% of contiguous US

04 – Inland flooding 

05 – Access
Via the Fathom API, Fathom Portal, direct provision or via a partner

06 – ~10 meter resolution

arrow light short rightFathom’s US Flood Map

Map of the UK in blue

Key features

01 – Climate Dynamics
5 climate scenarios across 3 time horizons

02 – 10 return periods
Ranging from 1-in-5 year to 1-in-1000 year

03 – Defenses
Unique detection algorithm that identifies flood defenses where data are not available

04 – Inland and coastal flooding 

05 – Access
Via the Fathom API, Fathom Portal, direct provision or via a partner

06 – ~10 meter resolution

arrow light short rightFathom’s UK Flood Map

Japan flood map

Key features

01 – ~10 meter resolution

02 Climate Dynamics
5 climate scenarios across 3 time horizons

03 Inland and coastal flooding 

04 – 11 return periods
Ranging from 1-in-5 year to 1-in-2500 year

05 – Access
Via the Fathom API, Fathom Portal, direct provision or via a partner

05 – Defenses
Flood defenses are explicitly built-in using a new levee detection algorithm

arrow light short rightDiscover Fathom’s Japan Flood Map
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Sompo international
Paul McEwan Sompo International Global Risk Analytics Director

Quote Fathom provide a first-rate product and service based upon cutting-edge research and methodologies, which are both robust and transparent. Their flood data sets are global, consistent and high calibre. Most importantly, Fathom is a responsive and collaborative firm who consistently deliver.

Judges comments New Civil Engineer Awards 2023 Technology Solutions Provider of the Year

Quote Highly knowledgeable presenters with genuine enthusiasm for the work they are doing. A product that can provide global impact in relation to an issue that is extremely high cost, and in a way that can be done efficiently and at scale.

Climate Engine logo
Caleb White Climate Engine Chief Operating Officer

Quote Climate Engine and Fathom have been in partnership for some time and our work with BMO’s Climate Institute is an example of how cutting edge flood modeling plays a key role in helping the bank and their clients mitigate risks associated with the physical impacts of climate change.

Microsoft logo svg
Ted Baksa Microsoft Senior Software Engineer

Quote Fathom’s flood hazard and risk data products are critical to assessing risks to Microsoft’s cloud infrastructure. In this way, their data impacts the delivery of services relied on by the 400 million global users of Office 365, Outlook.com and OneDrive, and the 48 million members of Xbox.

Dr Matthew Free Arup Director of Natural Hazard and Risk Management

Quote Fathom’s most recent release – Fathom-Global 3.0 – provides flood maps for anywhere in the world, and at improved levels of detail, providing information to help decision makers better manage their future flood risk by considering climate change and the associated uncertainty.

Accessing Global Flood Map

Fathom API

Fathom’s API is a cloud-based solution for data provision that enables users to access Fathom data on-demand directly.

Fathom Portal

Fathom’s Portal is an interactive platform that enables users to host, view and analyze data, without the need for an in-house platform.

On premise

Fathom’s products can be provided directly as a set of GeoTIFF files and hosted on premise.

Partners

Fathom data is available through a range of partners.

The evolution of Fathom’s Global Flood Map

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Fathom-Global 1.0

2015

The most comprehensive global view of flood available at the time, Fathom launched its first flood hazard dataset in 2015.

Built on 30 years of published scientific research, it used an early iteration of our global terrain data. We knew that floodplain topography and small flow pathways were poorly defined in some areas and that we could significantly improve on this in future releases.

Groundbreaking flood hazard data:

  • Terrain data: custom-processed SRTM
  • Discharge estimation: Global RFFA 
  • River channels: HydroSHEDS+
  • Efficient Fathom hydraulics models
  • Fathom model automation framework.

Fathom-Global 2.0

2019

The second iteration of Fathom-Global featured major enhancements. Better representation of river Channels and the ability to produce plausible event footprints were groundbreaking advances.

Our research programme was already pointing the way to even more significant developments to come, especially in our understanding of terrain and river channels.

Major leap in our understanding flood:

  • MERIT-DEM terrain dataset
  • River channels: MERIT-Hydro
  • Plausible event footprints.

Fathom-Global 3.0

2022

A step change in risk professionals’ ability to understand flooding at the global scale.

Coupling the latest topography and hydrography datasets with cutting-edge hydraulic modelling. Our latest terrain data, the first global digital elevation model with forest and buildings removed at a ~30-meter resolution and employing the most advanced representation of river channels available, including estimations of location, size and depth.

State of the art in flood data science:

  • Fluvial, pluvial and coastal. The first complete global view of flood hazard
  • Climate dynamics. Maps across time periods, warming levels and emissions scenarios
  • API. On demand access to all of our spatial data
  • 100% of river channels modelled.

1.0 2015
2.0 2019
3.0 2022

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