If I was reading the purpose of this stackexchange site right, I could also ask general map questions. Not necessarily regarding software.
Anyways, I was wondering if someone could inform me what this blue line indicates on this topo map image. I understand the circular line with the ticks indicates a lower elevation, possible sinkhole-like, but I don't know what that blue line is.
Also, does that line with the Xs through it normally indicate a fence?
If it matters at all, this is a map image from an ESRI powered site.