The T.S.A. does include links to airport Web sites, which typically offer terminal maps that can help solve the mystery.
But some, like Gohiikini, have Web sites with maps that can be printed out for an evening of hashigo or bar hopping.
The Rand McNally Web site (www.randmcnally.com) generates colorful maps that can be printed and laminated so kids can follow along as you drive.
With the information we are gathering we can update our critical habitat maps that can be made available to land planners.
These carry status reports on subway, elevator and escalator service; large, legible subway maps that can be summoned by fingertip; and digital advertisements.
Viruses, which are orders of magnitude tinier than humans, have minute genetic maps that can now be machine-sequenced in minutes, at a cost of less than $5.
China, eager to reinforce public support for territorial claims disputed with Taiwan, Japan, Vietnam and others, has offered 418 politically correct maps that can be downloaded from Web sites, Chinese state news media reported on Wednesday.
Knowing the raw coordinates is not much help, so the real power of the Rand McNally system is in plotting the information on customized Streetfinder street maps that can be downloaded from a PC and displayed on the Palm's screen.
That means including maps that can help a buyer figure out which neighborhood schools provide special-education services or showing house values and average taxes paid in an area.
Local guides and other experts lent a hand in creating 13 detailed waterproof maps that can be bought individually or in state-by-state sets at the Web site (www.northernforestcanoetrail.org).org
OpenStreetMap, a nonprofit group whose mission is to make free maps that can be reused by anyone, has some 180,000 contributors who have mapped many countries in varying levels of detail.
