GM Johnson - Street Maps USAGM Johnson & Associates Ltd. is a computer cartography company, specializing in street maps and atlas publishing for the North American retail market. GM Johnson uses advanced technology to design and publish maps. GM Johnson has built a solid publishing business over a 16-year period, and has been aggressively building its street maps and atlases over the past 10 years. They have increased production by using technology to produce over 50 new titles per year. In a relatively short period of time, they have produced a large collection of maps, atlases and bases (more than 320 titles).