Map Documents A variety of Department map documents including PLOTS guide mapsheets, lake bathymetry, species distribution, administrative districts and hunting units. Map Service Applications Access to a variety of GIS data and a suite of tools and functionality available through the web browser presented through the Departments map service applications. Garmin GPS Maps GPS maps including lake bathymetry, hunting units and PLOTS guide maps for a variety of Garmin GPS units. GIS Hub Data Portal The North Dakota GIS Hub Data Portal is a tool for finding downloadable GIS data, GIS web services, and GIS applications using geographic extents, searching by keywords, browsing or searching within categories, or some combination of all. Mobile Apps and Services Department map information available on smartphone or tablet devices and a variety of online web services.