Digital Map Databases in Support of Avionic Display Systems

摘要

The emergence of computerized mission planning systems (MPS) and airborne digitalmoving map systems (DMS) has necessitated the development of a global database of raster aeronautical chart data specifically designed for input to these systems. The Naval Oceanographic and Atmospheric Research Laboratory's (NOARL) Map Data Formatting Facility (MDFF) is presently dedicated to supporting these avionic display systems with the development of the compressed Aeronautical Chart (CAC) database on Compact Disk Read Only Memory (CDROM) optical discs. The MDFF is also developing a series of aircraft-specific, Write-Once, Read Many (WORM) optical discs. NOARL has initiated a comprehensive research program aimed at improving the pilots' moving map displays; current research efforts include the development of an alternate image compression technique and generation of a standard set of color palettes. The CAC database with provide digital aeronautical chart data in six different scales. CAC is derived from the Defense Mapping Agency's (DMA) Equal Arc-second (ARC) Digitized Raster Graphics (ADRG), a series of scanned aeronauticaL charts. NOARL processes ADRG to tailor the chart image resolution to that of the DMS display while reducing storage requirements through image compression techniques. CAC is being distributed by DMA as a Library of CDROMs. Digital moving map, Worm technology, Optical disk, database.