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Samuel R. Anderson and Kenneth R. Dixon, The Institute of Wildlife and Environmental Toxicology, Clemson University, Pendleton, SC 29670 USA

The HOME RANGE program initially was developed in the mid-1980s by Samuel, et al. The HOME RANGE program was developed to provide home range estimates based on an extension of the harmonic mean measure of animal activity and other commonly used methods. The authors have rewritten the program in C, Fortran, and Arc Macro Language (AML) to function in the workstation ARC/INFO environment. This program, called HRI for Home Range Interface, was a major advancement in the analysis of radiotelemetry data. The program now has been upgraded to function in a PC environment by rewriting it in the C language for Windows95/NT. This makes the system, HRI95, more "user friendly" and more widely accessible by freeing it from the Unix-based platforms needed to run ARC/INFO. The original HRI used ARC/INFO's advanced graphics and spatial analysis capabilities to create several ARC/INFO coverages, including a lattice of the harmonic mean grid, a Triangulated Irregular Network (TIN) of the activity level, and contours of selected activity levels. HRI then analyzes the input data set and performs all necessary calculations to provide ARC/INFO coverages for home range analysis. HRI95 still can be used to combine telemetry data coverages in conjunction with other data layers for analyses such as habitat preference and assessing the risk to environmental contaminants. The output from HRI95 still can be sent to Unix systems using workstation ARC/INFO.