LTRMP standard operating procedures: Quality control for cartographic activities Owens, T. W., K. Hop, L. Robinson, L. DeHaan, and T. Fancher. 1997. Long Term Resource Monitoring Program standard operating procedures: Quality control for cartographic activities. U.S. Geological Survey, Environmental Management Technical Center, Onalaska, Wisconsin, May 1997. LTRMP 95-P008-7. 10 pp. + Appendixes A F ABSTRACT The Environmental Management Technical Center has produced a series of standard operating procedure (SOP) manuals detailing the steps in producing spatial data sets to meet quality standards. The present SOP Manual is a continuation of that series detailing the quality control (QC) standards and procedures taken at each production step to ensure that the data are correct and can be passed to the next stage in the production process. Adherence to the SOPs detailed in the other manuals and to the QC procedures discussed here ensure that errors are kept to a minimum and that the data are reliable for monitoring and research. KEYWORDS Cartography, digitizing, photo interpretation, quality control, standard operation procedures, zoom transfer scope