map no good when of line and that's when you need it to find a hot spot , should save last map or local area to run of line
the map is a guide only as BT could not accurately show peoples home for security reasons. it also shows a hotspot like my own when I use netgear so there is no btwif signal albeit I am able to use BTWIFI
you don't need map just scan for BTWIFI signal wherever you are
Anyway, you can save a map yourself by taking a screenshot. Also useful if you're going somewhere unfamiliar and want to record nearby hotspots in advance.