Introduction to GIS - Using EPPL7 on a microcomputer Lowenberg, C. D. 1993. Introduction to GIS - Using EPPL7 on a microcomputer. U.S. Fish and Wildlife Service, Environmental Management Technical Center, Onalaska, Wisconsin, February 1993. EMTC 93-P002. 95 pp. + Appendixes. ABSTRACT This tutorial was prepared for field personnel in the Long Term Resource Monitoring Program (LTRMP) for the Upper Mississippi River System (UMRS) and other river managers who use Environmental Planning and Programming Language version 7 (EPPL7). The data sets included in the tutorial are from the LTRMP geographic information system (GIS) data base, and the exercises cover frequently used GIS procedures. KEYWORDS geographic information system, EPPL7, microcomputer