cellio: (avatar)
[personal profile] cellio
Google Maps almost failed me this morning. That's never happened before. Those "M" guys used to get things wrong so much that I couldn't rely on them at all; they even managed to leave out a major state road once, telling me that I could exit the interstate and get onto such-and-such road that was miles and miles away. And those "Y" guys led me on some merry romps a couple times. But Google Maps had always given me what I needed with a smile and useful photos besides.

This morning I had to run an errand in Wilkinsburg before work. I don't particularly know the wilds of Wilkinsburg, but it's not the land of unnamed dirt roads or anything like that. I was a little surprised that Google's directions didn't actually have me turn onto the street named in the address, but a street number of "xxx02" is likely to be at a corner, so that seemed ok. So, armed with directions and Street View of the key intersections I didn't already know (Street View has made my life so much easier in this land of sometimes-inadequate road signs), I headed off... and at the end of the directions found myself at the end of a road facing an iron gate. Oops.

So I called my destination, told them where I was, and asked how to recover. How far was I from such-and-such road? Sorry, not from around here -- never heard of such-and-such road. Ok, I should go back to other-such-and-such road and... wait, never encountered that one on my way here. We went back and forth a couple times and I said I guessed I was going to have to reschedule and get better directions. I repeated what I had said at the beginning of the conversation: I was at the end of such-and-such road facing an iron gate with an "authorized personnel only" sign and no other markings.

Wait, the guy said, is it a blue sign? Yup. Could I see a white building beyond the gate? Yup. He told me to wait. A couple minutes later somebody came to open the back gate so I could drive in. Weird!

So it worked out in the end (costing me 10 minutes or so), but it was very puzzling.

(no subject)

Date: 2011-03-19 04:20 am (UTC)
From: [identity profile] eub.livejournal.com
Oh, I assure you Google Maps runs into all kinds of problems all the time, we just try to find them and fix them before they go live, or before they affect anyone, or before they affect too many queries too severely...

I can't say if it applies to your case (would you be willing to post the address in question?), but one possibility is if you're routing to a destination that's an area (rather than a point), and if the data may not say where the driveway is. In which case it might decide to get you as close as it can, on the road network, to the center of the area. And possibly the back service road was the road that got closest to that.

Depending on the exact issue, it may be fixable most quickly by:
1) search for the place.
If the marker looks like it is showing the type of problem described above,
2) click on the marker to open the little dialog window
3) from the "More" dropdown, select "Move marker"
4) and drag it to the point it would have been good to drive to.

(Or you can use the "Report a problem" at the very very bottom of the directions, but that's more involved.)

(no subject)

Date: 2011-03-20 05:29 am (UTC)
From: [identity profile] eub.livejournal.com
I can reproduce the problem with not being able to drag the marker. Bleah, will report that.

[squirrel hill to 902 Brinton road, pittsburgh] is giving me this route onto Brinton Road (http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=FW0JaQIdjoc8-ykl36WZDPE0iDEeCOSh2vXi4g%3BFaP9aAIdTj09-ykhiOXlKuw0iDFDFrHJuxbtUw&q=squirrel+hill+to+902+Brinton+road,+pittsburgh&aq=&sll=40.435107,-79.87269&sspn=0.008819,0.010343&g=902+Brinton+road,+pittsburgh&ie=UTF8&ll=40.436267,-79.874382&spn=0.008819,0.010343&z=16&saddr=squirrel+hill&daddr=902+Brinton+road,+pittsburgh), which it sounds like is different than what you got. Did you get routed to that corner of Reed and Sperling behind the place, where it looks like there's a grown-over gate?

(no subject)

Date: 2011-03-24 05:50 am (UTC)
From: [identity profile] eub.livejournal.com
... and if I follow your link, I see your dead-end directions, but if I just re-issue the query by clicking the Search button, then I get the good directions. Yuck. This must be some type of cached geocode bug.

(no subject)

Date: 2011-03-24 07:33 pm (UTC)
From: [identity profile] eub.livejournal.com
Unofficially, a fix for this should roll out soon. It's possible that I was getting the fixed result because I was randomly in a subset of users getting the release early.

(To see if it's been fixed, best to re-do the query rather than using the saved URL. I don't know if it's true for this, but the saved URL tends to encode some things rather than letting them vary dynamically -- good for the recipient of the URL to see the same thing you saw, bad if what you saw was wrong.)

(no subject)

Date: 2011-03-25 03:25 am (UTC)
From: [identity profile] eub.livejournal.com
The part I can explain is the "center of the area" issue I mentioned upthread. That's why that back-corner destination ever came up.

There's a bunch of machinery around that "area" issue to try to deal with it correctly, so users get the front entrance when they ask for directions. Some of that machinery got out of whack -- I don't even know more detail than that.

(no subject)

Date: 2011-03-20 05:33 am (UTC)
From: [identity profile] eub.livejournal.com
(I'm working on traffic data these days, but I used to do the directions, so your problem is near to my heart.)

(no subject)

Date: 2011-03-24 05:51 am (UTC)
From: [identity profile] eub.livejournal.com
Oh, no problem at all! Thanks for the report.

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