Flood Risk and Hazard Mapping

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

Flood and Hazard Mapping

Worldwide high resolution flood risk and hazard mapping

Why is it important?

Flood risk and hazard mapping is important for efficient flood risk management. The flood maps are used to prevent flood damages, for land use planning and rescue operations.

How can it help?

With satellite imagery it is possible to map the extent of an area that has been subject to either a flood or hazard, and assess the damage, getting a full overview of where aid is needed the most.

What you get!

Assess the amount of flooding in near real time by triggering satellites to map flooded areas. The 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)

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

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

Typical customers?

Urban planners to manage and understand the flood risks in urban planning zones

Civil security agencies to asses the potential severity and frequency of flood losses in emergency situations

NGOs and governments to map, plan and analyse flood risk problems from local to national scales

Specifications

Satellites and our services are global

Get these type of maps daily depending on the overpass schedule of the different satellites

Get information about historical floodings depending on availability of archived imagery

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

Price list

Let us know in advance where and when you expect a flooding to occur and contact us for a quote!

Visit us at our flood data portal:

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

January 25, 2019February 6, 2019

The bi-annual Danish Marine Research event

The Danish Marine Research event:

25 January 2019

DHI GRAS presenting state-of-the-art marine and coastal research

Today is the last day of the bi-annual Danish Marine Research event, covering state-of-the-art research within marine and coastal topics.

In the session ‘New Technology in Marine Research and Monitoring’ we presented our new high-resolution Danish bathymetry model providing a first ever full national cover of shallow water bathymetry in Denmark and the status of our 2-year activity on high-resolution mapping of submerged aquatic vegetation at national scale funded by the VELUX FONDEN.

It is clear that the acceptance of satellite-based information as a valuable tool for monitoring the marine and coastal zone is increasing and we look forward to further work on increasing the acceptance through continued delivery of high-quality services and data products.

Contact us at gras@dhigroup.com if you want to know more about how we use satellite data to monitor the coastal zone or read about the project here.

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

January 16, 2019May 16, 2019

Satellite-derived bathymetry for nautical navigation

Providing accurate maps of the coastal zone for safe navigation of ships with satellite-derived bathymetry

Satellite-derived bathymetry for guiding nautical navigation

Providing accurate maps for the safe navigation of ships

The challenge:

Greenland Pilot Service provides navigational safety services in the Arctic region and their strategy is to contribute to a safe development of the cruise industry in polar regions.

They embark experienced and licensed Polar Code Compliant Pilots on board the cruise vessels. The Pilots contribute with local knowledge and experience, to strengthen the bridge team, ensuring a safe and effective operation.

The 24/7 manned operations center in Nuuk carries out all mandatory Risk Assessments, and continuously updates the pilots with daily information on weather and ice.

To be able to operate safely and ensure best practice, they needed updated information about coastlines and submerged hazards in the poorly charted shallow coastal area around Skjoldungen, Greenland.

Project highlights:

Updated and accurate mapping of coastlines including at high and low tide

Location and size of submerged hazards mapped with clear depiction of small and large submerged hazards

Updated spatial information ensuring safe transport of vessels, ideal for large and remote areas

Project Manager,

Greenland Pilot Service

Thomas Bøggild

With the help of satellite-derived bathymetry from DHI GRAS we were able to make a proper navigational risk assessment enabling our clients to safely access the remote and poorly charted waters around Skjoldungen. DHI GRAS did a great job in helping us understand the value of the data and delivery was fast and on time

In more detail..

We were commissioned by the client to provide them with accurately mapped coastlines at both low and high tide, as well as identify submerged hazards, such as reefs, rocks and sand banks.

Sentinel images provided the raw data, which were then analysed and validated. The information derived from satellites is much more accurate than existing nautical charts in the Arctic and allowed Greenland Pilot Services to safely enter the waters around Skjoldungen.

Greenland Pilot Service:

A pilotage company specialised in assisting masters and navigators in their operations in Polar regions.

They carry out mandatory risk assessments and contingency planning according to relevant laws and regulations as well as voyage planning while ensuring compliance with the Polar Code.

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

January 9, 2019June 14, 2019

Mapping aquatic vegetation in Denmark

Mapping aquatic vegetation in Denmark:

09 January 2019

For the first time, the aquatic environment around the Danish coastline will be mapped using satellite images.

By using satellites, the task is both easier to carry out and gives a better spatial overview.

This will help to strengthen the protection of our coastal water environment.

The project has been made possible thanks to a grant from the VELUX Foundation.

Watch the video below to learn more!

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

January 4, 2019May 16, 2019

Your geodata on the web

Entire geodata web solutions into one package. From data acquisition to intuitive applications for your users.

Your geodata on the web

From satellites through analysis to the web

Why is this important?

Easy access and visualization of geodata is as important as the actual analysis and processing of the data itself. We build modern and intuitive web apps that fit your needs, whether it’s an internal tool for your analysts to query data, or a simple and elegant app for visualizing results.

The solution can be based on tried and true analysis methods or modern AI and machine learning. Our analysts and software developers work together to transform it into an algorithm which can be deployed operationally. We automate the entire pipeline, from acquisition to analysis and visualization.

The highlights:

An algorithm built to solve your exact problem

A modern and elegant web app custom-built to suit your end-users

In more detail..

We build entire geodata web solutions into one package. Data acquisition from relevant sensors and satellites, analysis using our state of the art algorithms and AI, all the way to displaying the data in a custom-built web app, using our own open source raster server.

At DHI GRAS we have experts in both geodata analysis, software- and web development. We leverage this to provide you with a full package solution. We aim for full automation, seamlessly streaming results to your app as soon as they are processed.

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871