As the Army moves to converge Live, Virtual, and Constructive simulation domains for the Synthetic Training Environment (STE), the need for One World Terrain (OWT) capabilities greatly increases.  However, as more OWT standards, services and datasets evolve and mature, the focus now shifts more to terrain content in support of live training engagements which has implications on the terrain production strategy, representation of battlefield effects, and service availability at the point of need.  In order to minimize fair fight issues such as improper hit adjudication or potential negative training outcomes, the digital terrain to real world approximation will require increased spatial, geometric, and semantic resolutions that exceed traditional virtual or constructive simulation needs. In the evolution of the STE for Live Training Systems (LTS), OWT will serve as the core authoritative terrain content that can then be further extended for the STE LTS use cases toward adjudicating and providing accurate battle damage assessment from simulated weapons engagements.  The Army has a wide variety of weapons with associated penetration capabilities depending on the cover provided by the terrain.  High fidelity terrain characteristics coupled with ballistic and effects models are necessary to simulate the effects of various weapons in multiple engagement scenarios.  This paper presents initial experiences from the LTS community focused on hosting and delivering OWT services during live training exercises.  This data will highlight areas where OWT capabilities can be augmented and extended to address live training integration challenges in the STE.  Additionally, these experiences may support enhancements to geospatial data collection and distribution while encouraging developers to incorporate OWT capabilities into future training devices.  This will promote wider community acceptance and further refinement of the OWT standards and architecture.

Keywords
3D,ADAPTABILITY,ARCHITECTURE,AVATAR,CONCEPTUAL MODELING,DATA,ENVIRONMENTS,TERRAIN,URBAN ENVIRONMENT

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