Flood Extent and Hazard Mapping

Worldwide high resolution flood mapping using historical and near real time satellite radar images and digital elevation models

THE Highlights

Near real time flood extent (delivery in 24-48 hours)

Historical flood hazards

Depth of flooded areas

Damage assessment

Our Services

Near real time flood extent

Assess the amount of flooding in near real time by triggering satellites to map flooded areas. A flood hazard map can be acquired a few hours after flooding has occurred and delivered in less than 24-48 hours globally (different solutions apply)

Historical flood hazards

Prevent or limit floods from happening again by mapping historical flood hazards to understand the risks and take mitigating actions based on time series of satellite imagery

Depth of flooded areas

Using high-quality Digital Terrain Models suitable for assessing flood depth coupled with enhancement of Digital Elevation Models through advanced image analysis (feature extraction)

Damage assessment

Assess the amount of damage by acquiring satellite images after the flooding in very high resolution (1m)

Satellites can map the extent and location of flooded areas

Over 50,000 people were evacuated from their homes after water from a breached dam flooded communities in central Myanmar on the 29th of August 2018.

Several deaths were confirmed in relation to the flooding and it was estimated that at least 12,000 households were affected by the breach, not to mention the many hectares of farmland that were turned into muddy fields.

The region is known to be prone to flooding when heavy monsoon rain every year causes thousands of people to be displaced.

With satellite imagery it is possible to map the extent of a flooded area and assess the damage, getting a full overview of where aid is needed the most. 


Let us know if a flooding event is expected to hit near you

We make sure that price and user requirements match so you only pay for what you need ensuring fitness for purpose


  • More than 18 years of experience within state-of-the-art satellite remote sensing

  • Provider of rapid flood mapping and related services as an on-demand service for +10 years

  • Deep know-how of relevant data sources and independent distribution of the worlds most advanced satellite imagery and digital elevation models
  • DHI GRAS is part of DHI – the first people you should call when you have a tough challenge to solve in a water environment.

  • DHI’s knowledge of water environments is second-to-none. It represents 50 years of dedicated research and real-life experience from more than 140 countries.


Can I get the same information for my area?

Yes, satellites and our services are global!

How often can I get these type of maps?

Potentially daily (and in some cases a few times per day), but this depends on the overpass schedule of the different satellites.

Can I get information about historical floods?

Yes, but this depends on the availability of archived imagery.

What costs are associated?

Contact us for a quote.

How quickly after the flooding can I get the information?

The raw satellite image is typically available within hours after the image acquisition. The time needed for analysis and production of maps, can vary from a few hours to days depending on the area size.

How to get started?

Simply let us know in advance where and when you expect a flooding to occur, then we can initiate a tasking of new satellite images of the needed area/time.

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Agern Alle 5,
2970 Hørsholm,

+45 4516 9100