products Digital Elevation Models (DEM)
Digital Elevation Models (DEM)
A Digital Elevation Model (DEM) is a digital representation of ground surface topography or terrain. A DEM can be represented as a raster (a grid of squares) or as a triangular irregular network. DEMs are commonly built using remote sensing techniques; however, they may also be built from land surveying. DEMs are often used in geographic information systems and serve as the most common basis for digital relief maps and are commonly called Digital Surface Models (DSMs).
Bathymetry
TCarta Marine Global 90m Grid Bathymetry Data
Our bathymetry datasets include available 90 meter resolution grid, contour lines, sounding points, and the 1:60,000 scale coastline at a highly competitive price and the fastest delivery times – learn more
Data Specifications:
– Contour lines, sounding points, and coastline inputs
- 32- Floating Point grid
- No Data clip to coastline
– Integration with SRTM / DEM
DBM GIS Dataset
Current Data Coverage - Complete
- Canadian Arctic Ocean
- Baffin Bay & Davis Strait
- Beaufort Sea
- North Sea
- Norwegian Sea
- Greenland Sea
- Barents Sea
- Kara Sea
- Atlantic Coast of Europe
- East Siberian Sea
- Laptev Sea
- Offshore Libya
- Offshore Ghana
- Offshore Kenya
- Offshore Mozambique
- Offshore Tanzania
- Gulf of Suez and the Red Sea (coming shortly)
- Offshore Ivory coast to offshore Namibia (coming shortly)
- Gulf of Oman to India
- Gulf of Thailand
- Makassar Strait
- Chukchi Sea
- Denmark Strait
- North Island, New Zealand
- S. China Sea
- E. China Sea
- Yellow SeaA Additional Regions available within 60 days of placing an order.
The rest of the world's regions available within 6 weeks of placing order.
Please contact us via phone or email for additional information and pricing. To expedite your request, it's very helpful if you can provide an Area of Interest which can be submitted through this form.
ASTER DEM
ASTER GDEM was produced using ASTER data acquired from the start of observation to the end of August, 2008 in cooperation with the Japan-US ASTER Science Team.
ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) is an imaging instrument flying on Terra, a satellite launched in December 1999 as part of NASA's Earth Observing System (EOS). ASTER is a cooperative effort between NASA, Japan's Ministry of Economy, Trade and Industry (METI) and Japan's Earth Remote Sensing Data Analysis Center (ERSDAC). ASTER is being used to obtain detailed maps of land surface temperature, reflectance and elevation.
ASTER GDEM is now released and its distribution started, after the validation and the distribution site design.
Intermap Technologies' NEXTMap® elevation data (DEMs)
Spatial Energy partners with industry-leading companies, like Intermap Technologies®, to meet the needs of energy companies worldwide. Intermap is a digital mapping company that has set the industry standard for highly reliable 3D digital models (DEMs) of the earth’s surface, including digital elevation data and geometric images of unprecedented uniform accuracy.
Intermap has built national databases, called NEXTMap® and Spatial Energy provides these DEMs to our customers. In addition to NEXTMap® USA, NEXTMap® Europe and NEXTMap® Britain, a host of additional digital elevation datasets (DEMs) are available, including Indonesia, Jamaica, the Philippines, Puerto Rico, the Solomon Islands, and Vanuatu.
NEXTMap datasets are current, off-the-shelf products that can be purchased immediately and are available in different specifications and types. Verified by eleven, national independent agencies, these models provide a high degree of accuracy and have many applications within the energy industry.
This NEXTMap DSM shows an area in the Marcellus Basin where the data is being used to eliminate unnecessary, counterproductive guesswork and optimize investments in natural oil and gas exploration and production.
Available products include:
- Digital Terrain Models
- Digital Surface Models
- Orthorectified Radar Images
Common uses of DEMs include:
- new venture planning
- modeling surface and ground water flow patterns
- viewshed/line of sight analysis
- logistics planning
- seismic planning
- well site planning
- pipeline route planning
- facility planning
- drainage analysis
- cut-fill operations
- creation of relief maps
- extraction of terrain parameters
- rendering of 3D visualizations
- rectification of aerial photography or satellite imagery
Quality of DEMs
The quality of a DEM is a measure of how accurate elevation is at each pixel (absolute accuracy) and how accurately is the morphology presented (relative accuracy). Several factors play an important role for quality of DEM-derived products:
- terrain roughness
- sampling density (elevation data collection method)
- grid resolution or pixel size
- interpolation algorithm
- vertical resolution
- terrain analysis algorithm
Spatial Energy offers DSM and DTM products:
In addition to DEMs, Spatial Energy can also provide either digital surface models (DSMs) or digital terrain models (DTMs) when digital representations of the earth with buildings and vegetation removed are needed.
Spatial Energy offers the following DSM products:
Spatial 1m Digital Surface Model (DSM)
This digital surface model represents the terrain elevations and surface elevation of tree canopy and the top of buildings. Break lines are not added to the DSM. Bodies of water are flattened. The post spacing is 5 meters with vertical accuracy in open flat terrain of f 1m (RMSE).
Spatial 7m Digital Surface Model (DSM)
This digital surface model represents terrain elevations and also represents the surface elevation of tree canopy and the top of buildings. Larger objects are edited to the ground except in areas of dense canopy where the ground height cannot be determined. No break lines added to the DSM. Bodies of water are flattened. The post spacing is 30 meters with vertical accuracy in open flat terrain of 7m (RMSE).
Digital Terrain Model (DTM)
A Digital Terrain or “Bare Earth” Model can also be created when there is a requirement for a digital representation of the earth void of all buildings and vegetation. Pricing for DTMs can be provided on a custom project basis.
Additional Information
For additional
information and pricing, please
contact us via phone or email.
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