Digital Geographic Information (DGI) has evolved into one of the primary and most essential elements of many information system applications both for the Mapping@ Charting and Geodesy (MCG) Community and for other@ diverse users. This document provides the necessary data structure@ file organization@ format and capture specifications to enable the exchange of seamless raster data sets@ UTM/UPS Standardized Raster Products (USRP)@ on a common world-wide datum. Other forms of this same basic file organization and format have been created to enable the exchange of other types?of MCG raster data not explicitly for use in a seamless data sets.