Why are some map tiles missing above 60 degrees North Latitude?

The MotionX Terrain maps are provided by OpenCycleMap and the MotionX Road maps are provided by OpenStreetMap. OCM and OSM are open source map projects which rely on contributions from users. While much of the world has been mapped, there are areas with fewer contributors which contain missing data. If you’d like to contribute to OCM or OSM, see our section on Adding and editing content in OpenStreetMap and OpenCycleMap.