Template:GeoGroup/testcases3

Some data for testing:
 * Birmingham is at 52.486°N, -1.89°W
 * M5 / A41 junction is at 52.51172°N, -1.97513°W
 * The Black Country Living Museum is at 52.52007°N, -2.07527°W

Examples
Data from Netherton Tunnel Branch Canal article:

No coords
This section has no coordinates. Attempting to use in GeoGroup's section parameter should result in an error

Various maplink examples
Display the coordinates from a different section than this one (in current article):

Display the coordinates from a different section than this one (in current article), when that section has no coordinates: (error expected)

Display all the coordinates in a different article:

Display just the coordinates in one section of a different article:

Display all coordinates in a category: (expect maplink to be ignored for categories)