The Point Position Data (PPDB): The Future.
Abstract
Point Positioning Data Bases (PPDBs) are sets of stereo images for which exploitation parameters have been predetermined and recorded readable media. The imagery provides complete systematic coverage of a project area. A typical PPDB product currently contains image film positives, image paper prints, machine readable media with exploitation parameters, an atlas of image coverage and user instructions. PPDBs require and exploitation workstation. The workstation, or Analytical Point Positioning System (APPS), includes a stereo comparator, an IO device for reading parameters and a computer. Upgrade of the photo-based PPDB to a digital PPDB is inevitable. It would be a mistake to assume that a digital PPDB is different from the conventional PPDB only in the sense that imagery is encoded in digital form and stored on magnetic/optical media. Digital PPDB has a much broader functionally than conventional PPDB. Once a digital PPDB is available to field users, its usefulness will extend far beyond point positioning. A wealth of image analysis and feature extraction technology that previously could be used only at Defense Mapping Agency facilities can eventually be exploited at user sites.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 08, 1986
- Accession Number
- ADA173337
Entities
People
- Bruce D. Waxman
- John Unruh