Aerotrianguliacijos paklaidų pasiskirstymo tyrimas, taikant paviršių deformacijos teoriją

Abstract

The surface deformation theory was adopted for investigation of mean square error (RMSE) distribution and geometry representation in aerial triangulation block networks. Regarding theoretical (Fig 1, 2) and actual accuracy (Fig 3) of block adjustment, the colour isograms have been compiled the pictures of which querly describes photogrammetric model surface deformation. Using software WINSURF isograms were compiled according to mean square errors of 1355 photogrammetric points gained after the block adjustment. Simulating block network adjustment two options were chosen: kinematic GPS - photogrammetric network and traditional aerial triangulation network with minimum number of control points. In aerial triangulation controlled by kinematic GPS support, the planimetric RMSE was obtained which does not exceed 2-5 cm. Theoretical accuracy of aerial triangulation with minimum geodetic support was received more lower (≈9 times). It was determined that after block network adjustment the theoretical accuracy gained according to variance matrix data does not always correspond to the reality. Residual deformation of stereopair is defined by differential formulas (1,2). The surface deformation theory with graphical representations is the easiest way to detect the systematic errors and define pseudosystematic and partly random deformation of photogrammetric model geometry. The photogrammetric point coordinates calculated by aerotriangulation method are nearly without the influence of the systematic bias.