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Digital Ortho Photos of Ice free Greenland from existing Satellite imagery 2020

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Why is it important?

Topographic maps of Greenland are generally outdated, and the positional accuracy often inadequate, in the open land outside the main settlement areas.

This means that critical decisions relevant for public administration and environmental regulation are often based on inadequate data and information, thus impeding the ability of authorities to make informed and data driven decisions rooted in the best possible data.

The new up to date orthophoto mosaics based on the latest satellite imagery from the Airbus Spot 6/7 satellites will contribute to address this gap by providing a fresh view of the ice-free areas of Greenland.

Project highlights:

Provision of very high resolution satellite imagery covering 225.000 km2 of Greenland

Advanced large scale data processing to produce seamless cloud-free, orthorectified and color optimized image mosaics covering the entire 225.000 km2.

Independent advice and support on satellite data selection and processing, drawing upon more than 20 years’ experience

In more detail..

Since 2015, DHI GRAS has supported the Danish Agency for Data Supply and Efficiency (SDFE), in close cooperation with Greenland’s Government, in their mission to provide updated topographic maps of the ice-free areas of Greenland.

The current topographic maps of Greenland are based on data collected in the 1930s and 1970-80s and they are inaccurate both in terms of elevation, distance and geolocation. However, Greenland is a large country and combined with the extreme conditions, dark polar winters and frequent cloud cover makes it difficult and costly to map at scale through traditional means.

Through previous pilot projects (undertaken in collaboration with Airbus on behalf of SDFE), we have provided ready-to-use orthomosaics and detailed Digital Elevation Models (DEM) for an area covering 85.000 sqkm of Greenland, successfully demonstrating the viability and potential of satellite imagery as a solution to the existing data gap.

In this project (in collaboration with Airbus) we will deliver updated satellite ortho image mosaics for the majority of the ice-free areas of Greenland – covering an extent of more than 225.000 km2.

These new data, providing a fresh view of Greenland, will underpin efforts to update existing topographic maps, thus contribute to support informed decision making and make it easier and more secure to navigate in the vast Greenlandic nature.

In partnership with

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Danish Agency for Data Supply and Efficiency:

The Danish Agency for Data Supply and Effeciency (SDFE) provides high-quality data to the public and private sectors, enabling them to make important community decisions on the best possible basis.

SDFE is an agency that spans broadly across public administration and is part of the Danish Ministry of Climate, Energy and Utilities.

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EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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WindSight – input for wind resource assessments

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Why is it important?

Accurate estimations of wind energy resources are highly complex and time consuming - ultimately relying on consistent, accurate and timely input data. Yet, in many cases such data is inaccessible or simply not available and this may impact the ability of wind modelers to accurately assess wind resources.

How can it help?

The WindSight data package provides a new generation of satellite-based information products to improve wind resource assessments.

WindSight includes 5 different high-quality and high-resolution data products on land cover, key forest characteristics, historical and future changes, topography and surface roughness. The core of the product suite includes the novel forest products which provide detailed inside on current and historical forest height and forest density, in grid sizes of 20 meters. Together with an improved 10 meter land cover product, these provide the backbone of the surface roughness product that provides accurate insight on roughness length - directly compatible as input for a wide range of software and modelling methods including WindPRO, WaSP and CFD tools.

What you get!

5 different high-quality and high-resolution data products – tailored for wind sites anywhere in the World.

Analysis ready data compatible with WindPRO, WAsP, CFD tools and standard GIS software.

Accurate, timely and low cost information on forest height and forest density, replacing the needs for most LIDAR campaigns.

Typical customers?

Wind energy developers use the data products for preliminary screening of wind site suitability for planning and prospecting. 

Wind modellers use the advanced surface roughness data products in flow models, for improved accuracy of wind resource assessments. Testing at 10+ global wind energy sites has shown an improved accuracy of the modelled Annual Energy Production (AEP).

Specifications

Typically 10 meter resolution

Data can be obtained for any onshore wind site in the world

Cover large areas instantaneously to complement field data

Go 40 years back in time to estimate long-term forest changes

Monitoring information can be provided on a weekly basis

Data available in a ready to use format for easy incorporation into existing GIS systems and databases

Price list

Contact us for a quote

Want to know more?

Visit us at our WindSight product page:

Visit WindSight

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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Flood Risk and Hazard Mapping

flood risk and hazard mapping
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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)

flood risk and hazard mapping

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!
Want to know more?

Visit us at our flood data portal:

Visit Floodmetrics

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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Forest Monitoring with Satellites

forest monitoring
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Why is it important?

Forest monitoring with satellite data provide the consistent coverage needed to estimate forest cover area and forest cover changes over large areas.

This information is critical for decision makers and practitioners to take timely actions to protect forests and to promote sustainable forest monitoring and management as each year millions of hectares of forests around the world are being lost or degraded due to deforestation and wildfires.

How can it help?

Accurate forest and land cover maps are needed to assist land use planning initiatives and support sustainable forest resource management. They are a necessity for understanding the impact of human land use and land cover change on hydrological processes and climate change.

Earth observation can provide near real time alert information on forest disturbance which can help mitigate and assess damage from natural events (e.g. forest fires and storm damage) and forest encroachment due to unlicensed mining and agricultural activities.

What you get!

GIS maps to effectively share information about forest cover and land use

Ability to visualize and analyze the location and pace of deforestation

Better understanding of linkages between deforestation and issues such as e.g. forest fires and watershed hydrology

Typical customers?

Earth observation is often used in national forest inventory programs to complement traditional sample-based observations with estimates of forest area and/or volume per unit area
Conservation agencies uses satellites to get timely information on forest cover changes within protected areas
Monitoring and alert systems for storm and fire damage, estimation of changes in carbon stocks (e.g. REDD+) and to evaluate suppliers and their compliance with environmental standards

Specifications

Typically 10 meter resolution

Data can be obtained from anywhere on Earth

Cover large areas instantaneously to complement field data

Go 40 years back in time to estimate long-term forest changes

Monitoring information can be provided on a weekly basis

All weather capacity mapping through clouds and at night with Synthetic Aperture Radar (SAR) data

Data available in a ready to use format for easy incorporation into existing GIS systems and databases

Price list

Contact us for a quote

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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Crop Mapping Inventory

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Why is it important?

Crop mapping inventory is needed for government and national purposes but is also equally important for agri-businesses, farmers and as an input to support subsidies and certification systems.

Valuable information on crop status and growth development can be provided throughout the growing season to monitor crop progress and identify any signs of damage or stress.

How does it work?

Crop mapping refers to the inventory assessments of what is grown on the fields as well as the operational assessment of crop growth during a growing season.

What you get!

Up to date crop area and statistics of the major crop types

In-season operational assessment of crop health and status

Valuable information on crop type and acreage statistics can be provided on annual and semi-annual basis

Typical customers?

Agronomist can use crop inventory as input to models for the further assessment of harvest and yield prediction, soil productivity, or land use intensity

Agencies use crop inventories to monitor and plan growing seasons and for EU regulations on subsidies for crops

Agricultural companies such as fertilizer companies and seed producers can use crop information to better manage supply chains and improve sales

Specifications

Crop classification is benefitting from the recent surge in SAR and optical data availability, coupled with the development of advanced machine-learning classification algorithms.

SAR data provides information relating to structural characteristics of crops, including size, density, orientation and surface roughness, while optical imagery provides data related to leaf pigmentation, cell structure and moisture content.

We use a data fusion approach to crop classification as it offers the highest potential for accurate mapping. We have provided crop type mapping with average accuracies up to 95%.

The main output attribute of the classification will be the predicted crop class for each field parcel in the control zone. As an additional source of information that can help to evaluate class confidence, we will include crop class probability values.

Price list

The production of custom tailored crop inventory is between 1.5 and 2.5 Euro/km2.

For operational crop monitoring please contact us.

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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Water Quality

Satellite data analysis
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Why is it important?

Having access to near real-time information about the conditions of water quality and its distribution is essential to proactively manage risks and improve responses to water incidents, such as algal blooms, red tides or sediment plumes.

Remote-sensing is the only practical and economical method to detect the quality of marine environments as well as remote and large inland waters where frequent in situ sampling is impossible. Satellite-image archives enable change detection of previously unmeasured or un-monitored water bodies.

How does it work?

At DHI GRAS we process satellite imagery with state-of-the-art algorithms to produce accurate and seamless maps on water quality, such as chlorophyll concentrations or suspended matter content.

These maps enable assessments of the current and historic state of the water quality and its variability in space and time, which is key for impact assessments, early warnings, environmental monitoring as well as water resource management.

What you get!

Detailed and customised mapping of the water quality in your water environment with very fast turn-around time

Insights into historical water quality conditions and comparison with present information

Seamless integration of information from Earth Observation and in situ monitoring into your decision support system

Typical customers?

Contractors to survey the impact of construction work in marine environments

Authorities to complement or redesign traditional water quality monitoring for their monitoring obligations, e.g. for the Water Framework Directive or support early warnings of occurrences of algae blooms, red tides and sediment plumes

Aquaculture farmers to monitor water condition and its variability in space and time or support site selection decisions

Specifications

Depending on the aim of the monitoring and the desired spatial resolution, the temporal frequency ranges from daily to annual and the spatial resolution from 10-300 meters

All data can be aggregated according to customer specifications, such as seasonal means, monthly means etc.

In general, satellites provide information on the uppermost layer of the water body

Please contact us for more information

Price list

Contact us for a quote

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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Satellite Imagery

Satellite data analysis imagery images
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Why is it important?

Satellite imagery is a highly valuable source of information as the applications are many and can be tailored to the individual project.

Traditional field surveys to monitor areas and projects are costly and time-consuming, whereas this solution gives you the information you need at a similar price but much faster.

With satellite imagery you can track the local environment, the progress of your infrastructure project or urban developments. It also allows for comparison with archived data and depicts large and remote areas.

How does it work?

DHI GRAS is working together with the world’s leading providers of satellite imagery to increase the access to the continuously growing field of satellite data.

Due to the recent improvements in spatial resolution, satellites are now a competitive alternative to aerial photography and field visits in many different applications. An array of different satellites ensures your specific needs will be covered.

Our vast experience allows us to offer our customers an independent and solid advice on which satellite image that would fit the specific purposes best.

Through our distribution agreements with almost all commercial satellite operators we make sure the latest news and details are available to our customers.

What you get!

A product that fits into all types of GIS applications and other software packages

Access to independent and experienced advice on which satellite imagery fits your project the best

Access to a large portfolio (+50) of radar imagery with all-weather image capabilities

Typical customers?

Municipalities looking for a cost-efficient overview of their area

Researchers looking for detailed imagery for research purposes

Planners looking for detailed insights for remote sites before field surveying and construction activities

Specifications

WorldView-2: multispectral imagery at 1.8 meter resolution and panchromatic imagery at 0.46 meters

QuickBird: 60 cm resolution (panchromatic and pansharpened) and 2.4 m multispectral

GeoEye-1: 0.4 m resolution (panchromatic and pansharpened)

Ikonos: 4 m multispectral

RapidEye: 5 m

Pleiades: 4 band data at 2 m resolution and panchromatic data at 0.7 m

Price list

Get archived optical data products from €10/km² with a spatial resolution from 0.5 m

Get new optical data acquisition from €17/km² with a spatial resolution from 0.5 m

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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Satellite-derived Bathymetry

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Why is it important?

Coastal environments are some of the most dynamic and constantly changing regions of the globe. Monitoring and mapping these changes is critical to environmental studies and construction activities such as harbours, pipelines and other critical infrastructure in the coastal zone and shallow off-shore areas.

A significant part of the worlds coastal region is still poorly mapped, or the mapping is significantly outdated. Navigating in poorly mapped or dynamic areas can be supported with up-to-date satellite-derived water depths. The quick turnaround allows for quick delivery of up-to-date information as support to time-critical situations such as disaster relief following natural disasters where existing map material may have become outdated.

How does it work?

At DHI GRAS, we have developed a cost-effective method for accurate water depth mapping based on high resolution satellite images. Based on over 10 years of research and project activities we have developed an approach that exploits all the newest satellite systems.

Our proprietary state-of-the-art physical modelling method secures highly accurate deliveries. The approach is globally applicable, and we have helped clients all over the world from the polar regions to the tropics.

Satellite-derived bathymetry is a cost-effective approach to detailed mapping of the worlds shallow areas. Unlike field-based surveys the solution has a quick turnaround, no health and safety issues and requires no permits.

Since it is based on satellite information it is also ideal for remote areas and harsh environments.

What you get!

Very detailed mapping of the coastal and nearshore area in 2 to 10 meter spatial resolution 

Very fast turn-around time no matter the location

Our proprietary methods and rigorous quality assessment ensures high quality data deliveries

Senior Project Manager,
Niras

Klavs Bundgaard

NIRAS has used high resolution bathymetry data from DHI GRAS for a detailed wave and water level study in Denmark. The bathymetry data was derived from satellites in an impressive high resolution. With the surface coverage, it was possible to see detailed morphological variations such as longshore bars, sand waves and other similar features, which are not normally seen in traditional measurements with that level of detail. It clearly made the subsequent modelling much more valid. The product is price-wise very competitive compared to traditional survey methods.

Typical customers?

Widely used by the modelling community where accurate bathymetry is required for any high quality hydrodynamic modeling of the coastal zone

Engineering companies working in the coastal zone use our data in the initial planning phase and as a first screening before conducting costly field campaigns

National authorities and hydrographic offices get up-to-date information about territorial waters and minimize navigational hazards within their area of responsibility

Specifications

We are industry leading providers of satellite-derived bathymetry

Our solution is based on more than 10 years of research and development funded by European Commission, European Space Agency, national authorities and internal funds

We have a proven track record with satisfied clients all over the world

We have a fast turn-around on all deliveries

We offer a cost efficient and industry leading high-quality product

Globally applicable where conditions allow it

All data undergo a very thorough quality

Every data point comes with an associated derived uncertainty measure

Price list

Available resolutions:

2-m resolution

10-m resolution

Price range depends on size of Area of Interest

Contact us for details and custom quotes

Want to know more?

Visit us at our bathymetry data portal

Visit the Bathymetrics Data Portal

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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Digital Elevation Model

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Why is it important?

A DEM enables you to understand all aspects of the terrain and is an essential input in many geospatial analyses such as topography mapping, hydrological modelling, airspace planning, infrastructure site planning’s and environmental change applications.

An elevation model derived from satellites will overcome challenges related to the insufficient detail level in public available DEM’s such as SRTM, as well as being a more cost-efficient alternative to LiDAR and land surveyor based DEM’s.

How does it work?

A Digital Elevation Model (DEM) is a digital representation of the earth’s terrain heights.

We provide DEM’s created from stereoscopic satellite imagery, which is a highly cost-efficient alternative to traditional land and aerial based surveying approaches. A DEM can be used to derive topographic contours and compute elevation slope, aspect and other topography characteristics used in many geospatial analyseis.

A DEM can be delivered as both a digital surface model (DSM) which includes surface features such as vegetation and man-made structures, as well as a bare-earth representation without above ground objects (DTM) – both options ranging from 50 cm to 30 m in spatial resolution

What you get!

Updated and tailormade Digital Elevation Model (DTM/DSM), delivered in any ready-to-use GIS format

Possible additional data layers such as contour lines, hydrological enhancements, satellite imagery

Our independent and qualified advice on selecting the right solution suited to your project requirements

Typical customers?

Hydrological modelers work with DEM’s for flood modelling

Aerial operators (e.g. UAV and airplane pilots) need accurate terrain heights to safely plan their flight

Wind resource modelers need accurate terrain heights to estimate onshore wind resources

Specifications

Delivery time: Some products are ready to go, others need a bit more processing time

To further enhance the accuracies of the DEM, a few ground control points (GCP) is very often beneficial

We will assist with experience and guidance

Price list

Typical pricing:

1m DEM: 60-90 EUR/sqkm

4m DEM: 30-50  EUR/sqkm

Minimum order size: 100 sqkm

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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Coastline Mapping

coastline mapping
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Why is this important?

Coastal zone managers and port authorities have an advantage when they have access to information about the changes and trends in their coastal area.

Coastline mapping is a solution that uses satellite images and historical archives dating back to the 1960s with the option to combine with existing aerial photographs.

The highlights:

Archives dating back to the 1960’s and recent satellite data provides coastlines that are delivered in ready-to-use vector data format

The coastlines can be derived down to a map scale of 1:1.000, with spatial details of 0.5m to 30m, and comes with flexible options accommodating varying budgets and specifications

Digital maps of the entire coastal zone can be produced with embedded information such as vegetation, sediment, coastal protection, constructions etc.

In more detail..

DHI GRAS has profound experience in mapping coastal erosion and stability classification and with our expertise in this field we can tailor a solution that works for you.

Based on historical satellite data dating back to the 1960’s we can assess and quantify erosion/accretion changes over time. Methods used for extracting coastlines are typically semi-automatic object-based segmentation depending on the nature of the coast and the details needed in the final products.

Further classification of the coastal zone can be derived based on the timeseries of satellite data to extract information about dynamics and development of vegetation, coastal protection, constructions etc.

Tidal information can be considered by adding corrections based on DHI tidal models.

coastline mapping

EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

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EOatDHI part of the DHI GROUP

gras@dhigroup.com
+45 4516 9100

Agern Alle 5,
2970 Hørsholm,
Denmark

CVR: 36466871

Disclaimer
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