The precision is met the need of 1:2000 scaled topographic map 
making in the view of precision of checking points. The internal 
precision of corrected imaged = ¿0.07/77 that indicates the 
internal geometric precision of the corrected image is quite 
good by using the Equation (1). 
4. CONCLUSIONS 
In the condition of limited area (1 km 2 ), flat relief (the 
difference in elevation less than 1 m) and high quality imaging, 
the internal geometric precision of standard images taken by 
QuickBird is in high quality. The precision of 0.6 pixel can be 
obtained by means of first-order or second-order polynomials 
usually when the images are integrally corrected by applying 
polynomial mathematic model. If the polynomial order is too 
high, the precision will be declining instead, the absolute root 
mean square error of horizontal coordinate being 0.35m. 
Discarding aspect of the ground resolution, the absolute 
precision of simple-points has meet the requirement in 
planimetrie precision, of 1:2000 scaled topographic maps. 
REFERENCES 
CaoTong, 2001(3). Study on the earth correction of TM and the 
mosaic method. Beijing .Remote Sensing For Land & Resources. 
Chen Ze-ming, Ma Rong-hua, 2002 (1) . Analysis for the 
Remote Sensing Image Precision of the Satellite IKONOS 
Beijing: Remote Sensing Technology and Application. 
Feng Ji-wu, PAN ju-ting, 1991 .Remote sensing cartography 
Beijing: surveying and mapping publisher. 
Wang Zhi-zhuo,1986. The continuation of photogrammetric 
principle. Beijing: surveying and mapping publisher.