The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008 
171 
Regions 
RMSE of the model SRTM dependence on slope area [m] 
to 2° 
from 2° to 6° 
Mazowieckie 
0.8 
(•) 
Lôdzkie 
0.9 
(•) 
Wielkopolskie 
0.7 
2.4 
Podlaskie 
1.1 
1.7 
Warminsko-mazurskie 
0.8 
2.3 
Kujawsko-pomorskie 
0.7 
1.8 
Zachodniopomorskie 
0.9 
2.5 
Lubuskie 
1.4 
(•) 
Pomorskie 
1.2 
2.5 
Slqskie 
1.3 
3.7 
Malopolskie 
1.1 
3.4 
Swiçtokrzyskie 
1.2 
3.5 
Lubelskie 
1.6 
2.4 
Podkarpackie 
1.1 
3.4 
Table 3. The values of RMSE after bias elimination 
Figure 1. Height differences between DEM and terrain profile points in meters 
REFERENCES 
3. CONCLUSION 
On the base of investigate research was affirmed that SRTM 
model include systematic error. Average of bias amounted 
for flat area 3.5 m and for hilly area 3.7 m. The quality of 
SRTM model increased after elimination bias. 
The accuracy results showed that SRTM DTED-1 data 
supply by measure of characteristic relief form establish the 
perfect source material to generate contours lines on the 
topographical maps in 1:50,000 scales and less. It can be also 
used to generating of orthoimages on the basis of high 
resolution satellite data (SPOT 5, Ikonos and QuickBird) 
which should be collected with small off-nadir viewing angle 
of the sensor. Obtained result can be used as reference data 
for calibration of the interferometer and his measuring- 
system of the SRTM mission on the area of Poland. 
References from Journals: 
Rodrigues E., Morris C. S., Belz J. E., 2006. A Global 
Assessment of the SRTM Performance. Photogrammetric 
Engineering & Remote Sensing, s.261 - 267. Remote 
Sensing, XX ISPRS Congress, XXXV, Bl, Comm. I, 
pp. 474.478. 
Jacobsen K„ 2006. SRTM HEIGHT MODELS. 
GEOconnexion International Magazine, August, s.20-21. 
References from Other Literature: 
Ewiak I., Kaczynski R., Istanbul 2004. Accuracy of DTM 
generated from SPOT 4 and SPOT 5- HRS data. Int. Arch, of 
Photogrammetry and Remote Sensing. XX ISPRS Congress, 
XXXV, Bl, Comm. I, pp. 474 - 478.