IKONOS Terrain Model
The ITM-1 is the first seamless, high-quality and consistent terrain data set globally available and derived from the IKONOS high-resolution imaging satellite. The terrain models are edge-matched, cleaned for data anomalies, and seamlessly mosaicked to be consistent with GeoEye's high quality standards and value expectations. These advantages translate to immediate productivity.

ITM-1 will establish the foundation of any geographic information and mapping system, and forms the basis for three-dimensional visualization, hydrology, degree and stability of slopes, least-cost-path analysis applications and other critical geographic modeling. Other applications include site planning for telecommunications, 3D terrain visualization for flight simulation, topographic map production, and photogrammetric digital image othorectification. ITM-1 Technical Specifications

Terrain Model-2 is a globally available DEM created using a proprietary process using IKONOS® and ASTER imagery.  ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) is an imaging instrument on board the Terra satellite that was launched in December 1999 as part of NASA’s Earth Observing System (EOS).

Terrain Model-2 is targeted at markets outside of the United States where quality DEMs are often very difficult to obtain. The key advantage of the product is that it is affordably priced and available worldwide.   There may be limited cases were ASTER imagery is not available due to cloud cover. Consequently, a feasibility evaluation must be done prior to order acceptance.