The paper gives first a review of the state of the art which is 
followed by a section on future possibilities of generalized photo- 
grammetric point determination. In the conclusion future tasks are 
specified. 
2. STATE OF THE ART 
  
2.1 REPRESENTATIVE EXAMPLES OF COMBINED ADJUSTMENT 
Point determination with general control and object information goes 
back to at least 1972. Three developments shall be mentioned here, 
which have had significant influence on practice and further progress 
in the field. 
The PAT-M43 program for block adjustment by models was extended to 
simultaneous consideration of statoscope and APR data, to save height 
control points. Although such auxiliary data were successfully used 
before, it was the first time that this information was rigorously 
processed in a combined adjustment. For the same purpose of saving 
height control object information in the form of equal heights of 
points along the shorelines of lakes was taken into consideration 
(ACKERMANN et.al. 1972). The latter information was also used in the 
SPACE-M model block adjustment program (BLAIS, 1977). A combined 
adjustment of photogrammetric image data and geodetic observations 
was realized by the SAPGO program (WONG and ELPHINGSTONE, 1972). It 
already offered the option of estimating the variances of adjusted 
object coordinates. 
Till today quite a number of further contributions to generalized 
point determination by aerial and close range photogrammetry have 
been published. Representative examples shall be treated here, start- 
ing with investigations and developments which relate to aerial 
triangulation. 
Block adjustment with auxiliary data, supplied by navigation systems 
is investigated in (ACKERMANN, 1984). Simulations and practical re- 
sults are reviewed. Combined photogrammetric and Doppler adjustment 
is studied in (ANDERSON, 1982). The author suggests a rigorous adjust- 
ment in two steps. First the Doppler station coordinates are estimated 
with their full covariance matrix. This information then is used in 
photogrammetric block adjustment. A report on the use of auxiliary data 
in model block adjustments is given in (BLAIS, 1984). Results obtained 
with various types of simulated and real auxiliary data are discussed. 
The advantages of the use of existing geodetic observations in photo- 
grammetric control densification are pointed out in (BURTCH, 1984). 
Bundle block adjustment with consideration of various geodetic obser- 
vations is treated in (CORCODEL, 1984). 
A concept for generalized adjustment by least squares, called GALS is 
presented in (ELASSAL, 1983). It allows for any number of types of 
observations with corresponding variances and covariances. In addition 
to the unknown parameters their covariance matrix is estimated. 
Further examples of using geodetic observations to control aerial