Digital Elevation Models (DEMs)


LAND INFO's high quality Digital Elevation Models (DEMs) will aid you in achieving your project goals in the most efficient manner. We may already have the data you need in our archive, or can custom produce it upon request to your specifications.

Our Project Managers will work closely with you and your staff, taking into account the area in question, your project needs and budget to propose the most effective Digital Elevation Model solution.

Contact LAND INFO for a project recommendation.
  Digital Elevation Model (DEMs) image

Digital Elevation Models (DEMs) can be derived from a number of sources:

Topographic maps -- large-area cost-effective coverage

High-res optical stereo satellite imagery such as GeoEye-1, WorldView-1, WorldView-2, WorldView-3, Pléiades 1A, Pléiades 1B & IKONOS -- accurate and detailed terrain data of site-specific locations on a global basis

Medium-resolution optical stereo pairs including SPOT-6, ALOS & ASTER -- large-area cost-effective coverage

Radar satellite imagery including RadarSDat-2, TerraSAR-X and TandemSAR-X -- 10m DEMs of tropical areas that would be too cloudy for optical satellite solutions

Manned aircraft -- stereo imagery or LiDAR, ultra-high detail and accuracy but contingent upon specialized aircraft availability; contact LAND INFO for information on the mobilization of specialized aircraft for your project or the use of a portable sensor that can be installed on a locally available non-modified aircraft.

UAS (Unmanned Aircraft System, commonly referred to as a drone) -- a new alternative for areas where manned aircraft are either not available or would be prohibitively expensive, and satellite solutions don’t meet project specs. LAND INFO’s UAS offers up to 1.5cm resolution imagery/5cm resolution DEMs, achieving 15cm vertical accuracy without GCPs!

Off-the-shelf DEMs: from LAND INFO archive, SRTM 30m, GDEM 30m, Intermap 10m & 30m WorldDEM, Intermap 5m NextMap (full coverage of conterminous USA and Western Europe, select additional global coverage), Airbus Elevation30/Reference 3d and Airbus WorldDEM 12m radar-derived DEMs. Contact us for new lower pricing & min orders.

DEMs are available in two main types: Digital Terrain Models (DTMs) and Digital Surface Models (DSMs). DTMs represent bare-earth where as DSMs are first level surface, meaning they’ll reflect the top of structures and vegetation. Additional ways to represent 3d surfaces of the earth include vector contours, Triangular Irregular Networks (TINs) and rectangular grids.

Common Uses and Advantages of Digital Elevation Models (DEMs)
What are some common uses for DEMs?
• Watershed Modeling
• Civil Engineering
• RF Modeling (Wireless Communications)
• Simulation & Training – Military, Aviation, Urban Planning
• Cartography/Base Mapping
• Mining
• Orthorectification
Advantages of using LAND INFO DEMs:
• Accuracy and Quality
• Extensive Geographic Coverage
• Quick Turn-around Times
• Multiple solutions available to meet your project
   and budget needs
• Custom recommendation for your specific project

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Related Pages:
Examples of Digital Elevation Models (DEMs)
Examples of Terrain Representation Formats
Digital Elevation Models (DEMs) from Satellite Imagery
Digital Elevation Models (DEMs) from Topographic Maps