Final answer:
Without access to a map or GIS data, the precise 8-digit grid coordinates for the northernmost point of Scotts Lake's shoreline cannot be determined; grid coordinates are location-specific and require relevant mapping information.
Step-by-step explanation:
The 8-digit grid coordinates for a specific point are based on a reference system that divides the Earth into a grid, allowing for precise location mapping. To find the northernmost point of Scotts Lake's shoreline, one would typically need a topographic map or access to a geographic information system (GIS) that provides the 8-digit grid coordinates for that exact location.
However, as we do not have the specific map or GIS data for Scotts Lake, it is not possible to provide these coordinates. If Scotts Lake were situated within a known region such as the Great Lakes or West Australia, we could provide a general range of coordinates based on the given median latitude and longitude values.
For example, the Great Lakes region has a latitude range between 41N to 48N and longitude range between 92W to 76W, with medians at 44N and 82W respectively. Similarly, for the Western Australia region near Swan River estuary and Cockburn Sound, the latitude median is 32S with a corresponding longitude median of 115E.