Interoperability between terrain data bases (ground, culture, and models) has been a problem for many years. Networked simulations make the problem particularly visible. Recognizing the problem is the first step in solving the problem. Measuring the problem is the next step. Minimizing or eliminating the problem is the last step. Completing all of the steps consistently yields a methodology to address interoperability. The Institute for Simulation has recently completed a research program for STRICOM and DMSO which directly addresses each of the above steps. This report will summarize the problem by reference to other papers and will concentrate on techniques to measure and minimize the problem. The techniques described combine automated and manual methods and are rooted in mathematics and statistics. Techniques for minimizing the problem are also described. Finally a methodology, with accompanying criteria, are presented for recognizing, measuring, and minimizing terrain interoperability problems. Use of computer generated forces as the criteria for assessment of interoperability is a key component of the method.

The techniques and criteria involve capturing terrain processing characteristics from image generators and computer generated forces and measuring the color, size, and placement of objects. Techniques are also presented for measuring correlation in terrain skin and culture. Remediation techniques are also presented for terrain skin. Finally a methodology using computer generated forces is presented for assessing whether interoperability has been achieved. The paper concludes with recommendations for additional research as the methodology presented is the first attempt at addressing this problem and therefore, is limited in its completeness.