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In August 2006 Geomodeling Department was established in JSC “KAZGEOCOSMOS”.
Functions of the Geomodeling Department are as follows:
• generation of detailed digital terrain relief models and orthophotomaps
on the basis of airborne and space-borne stereo photography
• construction of special maps based on aerial hyper-spectral scanner
data processing
Results of modeling include topographic maps (starting from M 1:500
scale), high-precision 3D terrain relief models, orthophotomaps,
specific maps of soil moisture content, vegetation cover conditions.
Owing to employing the advanced airborne survey technologies and
in-office data processing, the constructed specific maps ensure most
precise description of the Earth surface. Generated products are
effectively used in the engineering studies and environmental monitoring
projects.
In the beginning of 2007 JSC “KAZGEOCOSMOS” purchased the unique
airborne laboratory for the Earth remote sensing. The laboratory
is outfitted with the multi-spectral large-format UltraCamX digital
aerial camera and CASI-1500 hyper-spectral scanner. Such airborne
laboratory enables to implement ultrahigh precision airborne survey
in a multi-spectral (0.03 - 0.6m) and a hyper-spectral (0.25 – 4m)
ranges. As for its functional parameters, the airborne laboratory
has considerably better capabilities than the existing remote sensing
satellites, and in terms of the survey swath coverage such airborne
laboratory may be competitive to many commercial satellites.
Detailed digital terrain relief models and orthophotomaps construction
Geomodeling Department is outfitted with the up-to-date equipment
and the special photogrammetric airborne survey data processing software.
Quality of digital aerotopographic survey allows to generate cartographic
materials at 1:500; 1:2,000; 1:10,000; 1:25,000 scales in the computer-aided
automatic mode and in full compliance with all requirements of the
Land Resources Management Agency of the Republic of Kazakhstan. Large-format
UltraCamX camera geometry, the use of state-of-the-art GPS+IMU system
and advanced in-office photogrammetric processing system enable to
fulfill terrain relief modeling with +5cm plane and vertical accuracy.
The terrain relief modeling with so high accuracy may be done within
shortest timeframes and for significantly vast areas covering hundreds
of square kilometers. It is necessary to note that the airborne laser
scanners (i.e. the aircraft lidars) do not allow to build up a terrain
relief model with better vertical accuracy than 15cm. This drawback
is especially notable at generating models for the areas with rather
flat terrain relief. In contrast with the lidar survey technology,
a considerably higher efficiency of digital aerotopographic survey
(at identical requirements to the terrain relief modeling accuracy)
makes the use of a digital large-format camera economically preferable.
In the steppe and mountain regions of Kazakhstan the application
of digital aerotopographic survey for terrain relief modeling is
a more appropriate solution in terms of the survey quality and cost.
Special maps generation on the basis of hyper-spectral airborne
survey information
The airborne laboratory of JSC "KAZGEOCOSMOS" is equipped
with the high-resolution hyper-spectral camera which is the only
one available in the CIS. Geo-modeling Department is furnished with
the necessary software and hardware for constructing various special
maps on the basis of performing airborne surveys and hyper-spectral
data processing.
This Department is developing new techniques of airborne hyper-spectral
data processing for the following purposes:
• vegetation species composition analysis;
• species biomass density;
• health conditions of forestlands;
• plant community degradation degree;
• soil erosion level;
• soil moisture content;
• top soil chemical composition;
• water surface analysis;
• local spectral anomalies delineation (search for unsanctioned pipeline
cutting-in, leaks of chemicals, etc.)
Thematic hyper-spectral survey data processing for specific purposes
enables to perform fast mapping of vast areas with a high spatial
and spectral resolution unachievable by the Earth remote sensing
satellites.
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