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4. TASKS OF GEODETIC TEAM
Geodetic team is of key importance for work and cooperation of
other teams.
First of all we have to supply actual map of Park area. Some
teams use our color aerial photos for land cover interpretation.
Elaborated numerical map will be a geometric base for the
spatial information management system. We also realize and
co-ordinate work in this area.
The main tasks of our team are as follows:
0 topographic map in scale 1: 25000 elaboration,
0 computerization of cadastral cases and numerical cadastral
map elaboration,
and moreover
0 consulting in area of using aerial photos for interpretation
purposes,
0 creation and implementation of spatial information system
for environmental and natural resource management,
0 co-ordination in area of preparation data for spatial
information system.
. GeoSET - [5731-32 bdp - 1]
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For this purpose and for interpretation of land cover the color
aerial photos in scale 1: 20000 ware taken.
We started field measurements of photogrammetric ground
points using classical method. However, because of insufficient
quality of existing control networks in this area, using total
station appeared to be neither good nor economic solution.
Therefore we decided to use GPS.
Aerotraingulation was made with use of classical, analytical
technology: measurements on modernized Stecometer,
adjustment with polish block adjustment software - NADZOR.
Achieved results (Mp = +0.60m, Mh = £0.30m) are sufficient
for elaboration map in scale 1 : 25000.
For elaboration of topographic map we use modernized,
connected to PC’s analog stereoplotters and desktop mapping
software - GeoSET (Figure 1).
In GeoSET is also measured regular grid and topographic lines
for DTM. The contour lines on plotted ‘map are generated in
SCOP. We cannot use digital photogrammetry and procedures
of automatic generation of digital elevation models, because of
high cost of this technology.
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Figure 1: Photogrammetric map elaboration in GeoSET
5. EMPLOYED TECHNOLOGY
5.1 Topographic map elaboration
In such conditions as large (over 60.000 ha) area, difficult,
inaccessible, boggy terrain, the best solution for map
elaboration is photogrammetry.
GeoSET will be employed as main tool for redaction and
edition of topographic map, which we will plot on ink jet
plotters, too. At now other teams can use raw, not drafted map
in the form of verification plots (Figure 2) or disk files in BDP
(inner format of GeoSET) or DXF format.
International Archives of Photogrammetry and Remote Sensing. Vol. XXXII, Part 7, Budapest, 1998 165