Intermap Technologies - Digital Elevation Models
Proprietary mapping technology creates superior DEMs
The
high-quality 3D digital mapping data afforded by our proprietary
airborne interferometric synthetic aperture radar (IFSAR) technology
meet the demanding needs of a wide range of geospatial applications,
such as base mapping, watershed analysis, image rectification, and
line-of-sight analysis. Our IFSAR DEMs, collected as part of our
NEXTMap® countrywide mapping program, are predominantly accurate to 1
vertical meter and include:
Digital surface model (DSM)
- a first-reflective-surface model that contains cultural features such
as buildings, roads, vegetation, and natural terrain features. The key
benefit of the DSM is that it provides a geometrically correct base map.
Digital terrain model (DTM) - a
bare-earth model in which cultural features such as buildings, roads,
and vegetation canopy are digitally removed. Intermap has two versions
of DTMs available — to learn more, see "DTM v1.0 & DTM v1.5" information.
Intermap's DEMs
are included in our NEXTMap countrywide mapping program that includes
all of Western Europe, the contiguous United States and Hawaii, and much
of Southeast Asia.
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