ARC Digitized Raster Graphics (*.gen;TRANSH01.THF)

ARC Digitized Raster Graphics (ADRG) are digitized replicas of hard copy source maps and charts that the Defense Mapping Agency produces on CD-ROM (Compact Disc-Read Only Material) for distribution.

The ADRG process converts the hard copy source, datum and projection to WGS84 and the Equal ARC-Second Raster Chart/Map (ARC) projection which permits a worldwide seamless data base for map data of a given scale.

Products currently available are: Operational Navigation Charts (ONC) at 1:1,000,000, Tactical Pilotage Charts (TPC) at 1:500,000, Joint Operations Graphics (JOG) at 1:250,000, Topographic Line Maps (TLM) at 1:50,000 and Jet Navigation Charts at 1:2,000,000. Many are available for public sale.

SIS Desktop can use ADRG data as raster background images.


  • Cadcorp SIS Desktop
  • Cadcorp SIS ActiveX Modeller
  • Cadcorp SIS ActiveX Manager
  • Cadcorp SIS ActiveX Viewer
  • Cadcorp GeognoSIS