NH data: odd gap north of Keene (for the town of Gilsum)

[cooljeanius]

So, there are a lot of odd gaps in the map, but I thought I'd just highlight one relevant to my local chapter: does anyone know why there's this small empty patch just north of Keene in the Southern NH chapter's coverage area?

[cooljeanius]

Looks like that's the town of Gilsum: https://en.wikipedia.org/wiki/Gilsum,_New_Hampshire