Tactical Terrain Data (TTD) is comprised of data set similar in content, accuracy and resolution to a Class B, 1:50,000 scale topographic map, a 1:50,000 Tactical Terrain Analysis Data Base, and a Marine Combat Chart. TTD will contain unsynthesized and unsymbolized feature and attribute data plus elevation data. Feature and attribute data will include information about the size, shape, location and height of extracted features. The elevation matrix will contain elevation posts every 30 meters referenced to the World Geodetic System. TTD is considered the Army's operational support data base and will meet most user requirements. Special Terrain Data (STD) is comprised of elevation and feature data sets similar to TTD, but is much more detailed and accurate, being roughly equivalent to a 1:12,500 scale topographic map. The Defense Mapping Agency has recognized Army's need for the TTD product, but indicated that STD would be difficult to produce using current and planned production systems at DMA. Higher resolution STD is still required, but new DMA production solutions are needed. Some possibilities at least on an interim basis, include having an Army user employ TTD as a base to establish geometry, best-fit it to higher resolution source material such as the new generations of multispectral imagery, and extract more dense feature data as required.