The other day my husband and I nearly missed an early morning cross-country flight because our shuttle driver got lost in a pre-dawn maze of village streets. His initial mistake occurred when his GPS unit directed him to take a road that all the locals know is navigable only by 4-wheel drive vehicles with high clearances. Impassible for someone driving a large passenger sedan like him.
He got himself thoroughly lost, quite literally in the woods, and having lost faith in his GPS, had difficulty making his way to our pick-up location. By the time he called us for help, his emotional state made it difficult for him to make sense of our verbal instructions. And we were on the verge of panic about making our flight from Boston, given the rush-hour traffic we’d now to have fight.
Everyone in this Cape Cod village has known for more than a decade that most of the printed (and now digital) maps of this area are erroneous. Sadly, now these errors are getting replicated, published digitally, and distributed via GIS downloads to Garmin and other navigation devices. (I cite this Cape Cod venue as one example of a recurring problem.)
Twice in the past week while driving through cities on a major interstate highway, I’ve been given bad advice by my Garmin device. In both cases I ignored it because I happened to know the area well enough to realize the navigation directions made no sense at all. Human intelligence overrode the system based on prior experience. Had I taken action on the GPS system’s advice, I would have wasted time and gas, and quite probably gotten lost in both cities where this situation occurred. Needless to say, I now listen to the device with considerable skepticism about its accuracy and credibility.
So the question is, how can people correct known mistakes in the mapping systems that provide bad directions or send people down missing or unnavigable streets? Is there a crowd-sourcing solution? And if so, how can the information be validated?
Image courtesy of Google Earth: Cape Cod villages can be difficult to navigate even with the help of GPS units.

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Craigslist’s flagging feature, or something like it could work well here. If there is a problem with a posting, individual site users can “flag” it by hitting “flag” and then choosing from one of four options to describe the problem. Once enough people have flagged something, it comes up for review by a person (I think).
They could add a “Report Problem” button with simple options like “temporary road closed” or “road impassible” and once it came up enough times, have someone look into it.