Wow.
I spend a good part of my coffee and email time this morning flying around the globe with this data. My only comments are:
The boundy box appears to be sunk in the Arctic Ocean.
There is something going on with "route" which happens to coincide with the Death Valley waypoint.
Once again excellent Cy.

Regarding symbols... the subject of symbols always comes up and is never resolved. GPS manufactures have sets of symbols, not necessarly standard sets, which may differ from receiver to receiver. Mapping software developers have an even wider range of symbols extending to personal symbology ( a recent subject in the GPSXML yahoo group). When I am map authoring, using ExpertGPS, I use the Garmin eTrex set of symbols as there are a great many eTrex units in use by TravelByGPS.com patrons.