Shows geographic relationship between device's most recent known locations and the given region. The relation will always have a
geojson property of type
FeatureCollection which will contain at least the
Feature for the region. If last known locations exists for the device, the associated relations will be included, and their features will exist in the feature collection. If no known device location exists, the transition will contain data about the device and region, and the region will be included in the geojson feature collection.