Superpositioning of Digital Elevation Data with Analog Imagery for Data Editing

摘要

The Topographic Developments Laboratory of the U.S. Army Engineer Topographic Laboratories (ETL) has established the Photogrammetric Technology Integration (PTI) testbed system for the evaluation of superpositioning techniques utilizing electronically scanned hardcopy imagery with overlayed digital elevation data and for the exploitation of new stereoviewing technologies. The testbed is configured around the Elevation Data Editing Terminal (EDET) developed for the Defense Mapping AGency. The EDET system was designed to anaglyphically display digital elevation data, produced by automated correlation equipment, superimposed on the original imagery allowing an operator to validate or correct the data. Inputs include the original imagery, the setup parameters and digital elevation values. The interior orientation, along with the setup parameters, reestablishes the compilation model. The locally rectified imagery is viewed in one half inch square patches permitting an operator to correct the digital data where necessary. ETL is concerned with the evaluation and enhancement of the EDET system and interfacing new stereoviewing devices as an alternative to the current anaglyphic display. (Author)