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Figure 3.—IDPF network. 
DATA BASE UTILITY IN THE IDPF 
IDPF is a software package that controls a highly automated 
environment for performing all photogrammetric office processing. 
The IDPF also integrates computer graphics and data base management 
technologies in a network environment that supports a cluster of 
photogrammetric work stations. (See fig. 3.) Residing on the 
computer network are a number of data bases, one of which is a 
complete history of camera calibrations for the institution. 
The data base utilities function of the IDPF allows the operator 
limited access to the data base. The function, when selected 
interactively, invokes a list of cameras with information residing in 
the data base. Upon selection of the camera for the project, the 
camera calibration data are made available for photogrammetric 
processes on the IDPF. 
CONCLUSIONS 
The first phase of integration of the camera calibration allows the 
use of any combination of equipment for mensuration, processing, and 
data storage. Such an integrated software package will be useful for 
many agencies when adopting the NOS method of camera calibration. 
The inclusion of the NOS camera calibration software on the IDPF 
enhances IDPF's capability to perform on-line camera calibrations and 
enables network update of the camera calibration data base for 
cameras used in various projects. 
ACKNOWLEDGMENT S 
The author thanks Dr. Atef A. Elassal of NCRDL for the concept of the 
multiexposure, multicollimator camera calibration system and his 
support all along the project. Thanks are also due to 
Donald L. Light of USGS and his laboratory staff for providing the 
multiexposure, multicollimator calibration plates for two Wild RC10 
cameras used in the project. Lloyd W. Harrod of the NOS 
Photogrammetry Branch provided his expertise for measuring the 
calibration plates on the MASC.