832
September 2014
PHOTOGRAMMETRIC ENGINEERING & REMOTE SENSING
In Figure 6, Dr. –Ing Uwe Wössner (with the High
Performance Computing Center Stuttgart) is demonstrating
how you can manipulate the scene using a 3D mouse. In the
top left corner of the screen there is one of two tracking systems
that track both the 3D mouse and the viewer’s goggles so that
the orientation of the view is controlled by the orientation
of the viewer’s head. This will create the opportunity to run
through a multitude of scenarios in an emergency command
center.
I would love to hear ideas for future columns.
What are you curious about?
Write me at:
.
Jim Peters works in the Geospatial Industry. For ASPRS, he
currently serves as the Chair for the Electronic Communications
Committee.
Figure 5. Interactive digital light table
Figure 6. Demonstration of a “3D mouse” with an active 3D
projection system.
GGS in the region was developed in 1946-1988 within the
State program developed by Prof. F. Krasovsky following
the “Fundamentals of Construction of the State Geodetic
Network of USSR” issued in 1954 and 1961 on the ellipsoid
Krasovsky 1940
(where a = 6,378,245 m and
1
/
f
= 298.3
– Ed.).
Its class 1 network has сhains of approximately
equilateral triangles with sides of 20-25 km located roughly
in the direction of the Earth’s meridians and parallels at
intervals of 200-250 km with 800-1000 km perimeter.
The area that bordered by the class 1 triangulation chain
is covered with solid nets of class 2 triangles with sides
of about 10-20 km. The network of geodetic points can
be made more dense by construction of class 3 and class
4 triangles. The main cartographic projection used in the
Central Asian region was the Gauss-Kruger projection with
6° and 3° zones. The main Datum, Geodetic and Cartesian
coordinates were Pulkovo 1942 (SK-42)
(the origin point is
at Pulkovo Observatory where: Φ
o
= 59° 46′ 18.55
″
North,
Λ
o
= 30
° 19′ 42.09
″
East of Greenwich.
The defining azimuth
at the point of origin to Signal A is:
a
o
= 317
° 02′ 50.62»
-
Ed.)
, based on the ellipsoid Krasovsky 1940. There are other
coordinate systems used in the Soviet Union as Pulkovo 63,
SK-90 etc., but Pulkovo 42 has been used as a base for all
other following reference systems.
“The Kyrgyz Government has announced the National
Reference System “Kyrg06” in 2010 (Decree No. 235
from October 7, 2010). The National Reference System
is ordered to use for geodetic and topographic activities,
engineering survey, construction and exploitation of
buildings and structures, land surveying and maintaining
the state cadaster. Kyrg-06 is based on the International
Terrestrial Reference Frame ITRF-2005, UTM projection
with five 3º zones”
(GNSS Application Trends in Central
Asia, Akylbek Chymyrov, Nyugat-magyarországi Egyetem,
Geoinformatikai Kar, Székesfehérvár, 2014)
.
The contents of this column reflect the views of the author, who is
responsible for the facts and accuracy of the data presented herein.
The contents do not necessarily reflect the official views or policies of
the American Society for Photogrammetry and Remote Sensing and/
or the Louisiana State University Center for GeoInformatics (C
4
G).
