Abstract
Developers of the Geographic Resources Analysis Support System (GRASS) at the U.S. Army Corps of Engineering Research Laboratories (USACERL) have been closely involved with the SDTS project since February 1992. Software for the exchange of data between GRASS and SDTS is near completion. Access to SDTS data via this software promises many benefits for GRASS users, but SDTS will also pose challenges to the GRASS user community just as it has for the creation of GRASS-SDTS software itself. Areas of difficulty include distinctions between SDTS and GRASS in the definition of certain spatial objects, SDTS metadata requirements, and accommodation within GRASS of the complex data attribute schemas that will be typical of SDTS data sets.
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