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 can use ADRG data as raster background images.
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