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Proceedings Paper

How a digital photogrammetric workstation is compared to an analytical plotter
Author(s): Mostafa Madani
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Paper Abstract

A digital photogrammetric workstation (DPW) is an analytical stereoplotter that utilizes digital imagery for photogrammetric purposes. Recent trends in the computer industry's price/performance have already made cost-effective DPWs a reality. High-performance computers, high-speed image processing, lower memory cost, inexpensive mass storage, image compression/decompression techniques, and high-resolution monitors are now available commercially. In this paper, accuracy and performance of digital photogrammetric products on Intergraph's InterMap Digital (IMD) are compared against the InterMap Analytic (IMA). For such comparison, several aerial photographs of different scales are scanned at different pixel sizes using the Intergraph's PhotoScan. Orientation steps, with identical options and parameters, are performed by several operators on both systems. Digital Elevation Models (DEM) are also collected on the IMD and IMA and generated automatically by the MATCH-T program, developed by Inpho GmbH, Germany. Orientation and DEM results of all stereo pairs obtained by several operators are compared. Several statistical indicators, on the accuracy of the data, are extracted and some concluding remarks, regarding the performance of the operational steps, are provided.

Paper Details

Date Published: 15 October 1993
PDF: 11 pages
Proc. SPIE 1943, State-of-the-Art Mapping, (15 October 1993); doi: 10.1117/12.157158
Show Author Affiliations
Mostafa Madani, Intergraph Corp. (United States)

Published in SPIE Proceedings Vol. 1943:
State-of-the-Art Mapping
Bill P. Clark; Andy Douglas; Bryan L. Foley; Brian Huberty; LeLand D. Whitmill, Editor(s)

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