Slashdot Log In
Open US GPS Data?
Posted by
samzenpus
on Tue Feb 26, 2008 09:36 AM
from the directions-want-to-be-free dept.
from the directions-want-to-be-free dept.
tobiasly writes "I read an article today about a map error on the popular Garmin GPS devices which often leads to truckers in a particular town becoming trapped. From my own experience, every electronic map I've ever seen (Google, Mapquest, my Mio GPS) has the layout of my neighborhood completely and frustratingly wrong. A quick search turned up only one open-source mapping project, but it's for New Zealand only. Why are there no comparable projects in the U.S. or elsewhere? Obviously such a project would need a good peer-review/moderation/trust system but I'd gladly put in the time necessary to drive around town with my GPS in "tracking" mode, then upload, tag, and verify my local data. Has anyone with more technical knowledge in maps and auto-routing looked more into this? Are there technical limitations to such a project? Should the government subsidize a project to create open, free, up-to-date electronic maps? Surely there is a public benefit available from such a project."
Related Stories
This discussion has been archived.
No new comments can be posted.
The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
open street map? (Score:5, Informative)
Re:open street map? (Score:4, Interesting)
Parent
Re:open street map? (Score:5, Informative)
Parent
Re: (Score:3, Interesting)
Re:open street map? (Score:5, Funny)
Parent
No? There are commercial applications... (Score:5, Informative)
I am amongst the ones who believe we're only seeing the beginning of OSM everywhere. Contrary to your comment, I believe it is happening and will not take that long to reach some level of overall maturity. As to why is doesn't need an army of volunteers? Because, as done with the TIGER dataset, datasets are directly piped into OSM, as done in the Netherlands last year [slashgeo.org].
Parent
Re:open street map? (Score:5, Informative)
Parent
Re:open street map? (Score:5, Interesting)
Often the errors you see is because there was a planned development that never went through it they (the city/county whoever) changed the traffic flow more recently then the map data is. I found this to be the case back in 1991 when I was delivering pizzas. I grabbed a city map from a tourist booth only to find some roads didn't exist. I purchased a random McNally or whatever the name is from a gas station to find the same errors. After I went to the city engineers office looking for an accurate map, they explained this to me. It was also interesting that I would watch development projects going up and already have a map complete with street names several years after this.
If you see a map problem with any map, I would bet it is something to do with the political entity more then the map maker. It might be them in some cases but roads dead ending when they should go through a town is the cities fault. And you will likely find the same error across multiple maps.
Parent
Re:open street map? (Score:5, Informative)
Parent
Re:open street map? (Score:5, Insightful)
Parent
Frustrating (Score:5, Interesting)
Re:Frustrating (Score:5, Informative)
I think you are underestimating just how many roads there are in the US.
Source: National Highway System (United States) [wikipedia.org]
The National Highway System (NHS) of the United States comprises approximately 160,000 miles (256,000 kilometers) of roadway, including the Interstate Highway System as well as other roads, which are important to the nation's economy, defense, and mobility.
Further down in the same article:
The 160,000 miles of NHS include only 4% of the nation's roads, but they carry more than 40% of all highway traffic, 75% of heavy truck traffic, and 90% of tourist traffic.
That's a lot of roads. Stupid lazy companies...
Parent
Re: (Score:3, Informative)
Re:Frustrating (Score:4, Interesting)
The USA has a total of about four million miles of road. How would you go about mapping it all, and at what cost? Take a car, a driver and a passenger, the passenger having a notebook with GPS. And the notebook needs some pretty clever software. As the driver drives along, the passenger keeps track of everything that is going on - his job is to type in the name of the road, suitability for what kind of traffic, obstacles, and where you can turn. You'd probably want a separate input device for special functions, like road to the left, road to the right, or for "missed something" (the driver probably can't just stop anytime). So the software keeps building up a database, keeps track of things that are missing (if you typed in "there is a left turn here" then you'll have to follow that turn at some time).
With all overhead, you should be able to build a road map at about 10 miles per hour (less in New York, but more on country roads that stretch for miles). That is 400,000 hours. Lets say you can do 2000 hours a year, that is 200 cars driving around for a year. 400 people doing the work. If the job pays $60,000 a year, that is $24,000,000 in wages. You'd drive a total of say 12 million miles; at 100,000 miles per car that is 120 cars destroyed. Say $20,000 per car, that is $6 mil. $30 million, double it for everything I forgot, that is about $60 million to get complete road maps of the USA from scratch.
Parent
So do something about it... (Score:5, Interesting)
Parent
To the submitter: (Score:5, Funny)
for Argentina... (Score:3, Informative)
That's a pretty big job (Score:5, Insightful)
Re:That's a pretty big job (Score:5, Informative)
Keep in mind that there's USGS [usgs.gov], and that's not the only source of public maps (though that particular source isn't really focused on making navigation easier).
Most states are now working on providing a unified system for people to put their map info into (currently the best source of maps is counties and property appraisers - both of which can easily be mandated to upload their data if it doesn't cost them much).
So give it time. In the US this will become something provided as a government service, and the only people selling things will be the ones writing software that analyzes the data.
Parent
Re: (Score:3, Insightful)
Odd routing (Score:4, Interesting)
There are several interesting implications, the most obvious being "sponsored routing" down a particular street in a business dist.....gotta go, I'm on the phone with my patent attorney.
Re: (Score:3, Interesting)
The next left will add 0.3 of a mile and an extra turn to my journey bu
Government Maps - of course (Score:5, Insightful)
~whm
Re: (Score:3, Informative)
Re:Government Maps - of course (Score:5, Informative)
Now, as for the fantasy of people driving around with a gps attached to their car (ha ha, isn't that stupid!), um, oh:
http://www.navteq.com/about/whatis_difference.html [navteq.com]
"NAVTEQ digital map data is built on the roads of the world. Over seven hundred NAVTEQ field researchers from approximately 168 offices drive millions of kilometers of the road network each year. To provide uniformity and maximize precision each team works to a single global specification. And each team has state-of-the-art equipment, including our proprietary GPS-based collection technology and GWS software.
These field teams are constantly verifying and updating the database, not only in terms of road geometry, but also in details. Each team finds and records up to 260 attributes--everything from addresses and road signs to turn restrictions--for each segment of road. The result is the NAVTEQ difference: digital map data that is precise, robust and multifaceted."
There's no pretense; Navteq has people driving around, with gps's, verifying speed limits, road conditions, etc. That's why companies like Google and Yahoo buy their data. Before you act like an ass, you might want to do some rudimentary fact-checking...
Parent
TigerData et al (Score:4, Informative)
2. As for "driving around" it would depend upon how accurate the device is. The local utility company I work closely with spent 5,000$ just on the handheld to receive subcentimeter readings and about 20,000$ on the base station to accompany it. Your typical yellow DeLorme unit is great for driving around but it is not a data collection unit I would use when building maps. Depending upon satellite coverage for your area (weather, tree cover, geography, the placement of the 3 satellites needed to position accurately) your store bought unit could be as much as 100ft or more off your actual location and rarely closer than 5ft. Again depending upon coverage and the device. Then add the need for regular updates and mapping changes.
3. An open source mapping project would be great, but it is currently rather expensive to actually collect and process the data needed to build accurate maps. A terrific source of addressing and centerline information is your local E911 Board. At least in my part of the world they do much of the fire district, centerline, and, of course, addressing for mapping.
Parent
Tracks4Australia (Score:3, Informative)
Maemo Mapper! (Score:3, Informative)
Make a U-Turn (Score:3, Funny)
The story goes like this: My girlfriend got one for Christmas and we where going to test it by going to get grandmothers house. Halfway there my girlfriend went on autopilot, so to speak, because she's done this trip so many times. All the sudden we hear "Make a U-Turn... Recalculating" What the hell? Then we hear it again... The Garmin was telling us to perform illegal U-turns to work on its gps calculations.
I wonder if that would hold up "But officer. The GPS told me to!"
Re:Make a U-Turn (Score:5, Funny)
Parent
Story (Score:3, Interesting)
Mapshare? (Score:4, Informative)
I would love to see an open mapping project though.
Check your local streets dept. (Score:3, Informative)
Sure, it would be nice if there was some federal D.O.T. streets db for the entire country that your local streets department could upload all their changes into and all the GPS map folks would just that. I doubt it'll ever be that clean cut or that your local street department will want to even give any other city much less state or federal government department access to updated street info. This is just my personal experience working in a city police department and occasionally trying to get this information from the city entities that physically make and should be tracking these things.
The more that I see that its difficult or impossible for intercity departments to communicate I tend to think that the only real solution is for Pizza companies or UPS/FedEx to partner with Google streets to actually physically map out where their fleets move through.
If your city has a GIS department, then that should be keeping track of this information.... You could always do a FOIA request for any arcview street centerline data.
The problem is that most of us have problems getting that "updated" arcview street centerline data into our lowest price GPS device.
Open Source UK GPS Data (Score:5, Informative)
Fixing errors on mapping sites (Score:3, Informative)
Please forgive the slightly off-topic post...
Two of the biggest map data providers are Navteq [navteq.com] and TeleAtlas [teleatlas.com]. Each company has a section on their website where you can report errors in their maps.
Since they will need to review your submission and mapping sites like Google Maps and Mapquest only update their map data a couple times a year, it will be a while before your correction goes public (if ever).
The obvious solution... (Score:3, Insightful)
Prior art (Score:4, Informative)
This is a great idea. We could have some federal government institution which deals with lots of maps anyway take the initiative and create digitized map data for the whole country, using information from USGS quads. For "fact checking", they could mail out the map data to every municipality in the country, who would make corrections which would be incorporated into the system. The data would be publicly available from the government for free, to be used by open-source or commercial makers of maps and map tools.
Congrats! You've just re-invented TIGER, run by the U.S. Census Bureau. If you use map software, it probably uses TIGER data. If the data in your town is inaccurate, it's because your local government sucks.
The dancing dog observation (Score:3, Insightful)
Here's a reality check. Pick any one-square-mile area of your community and attempt to create (and keep up to date) a GPS navigation system that will legally, safely, and efficiently navigate you between any two addresses within that square mile, keeping in mind your civil liabilities should your system cause accidents, injuries, or illegal driving maneuvers. Oh, and your navigation system has to fit in a device that's about the same size as a Palm Pilot or an iPod touch and that runs on rechargeable batteries.
Now scale this up by about 3.5 million to cover the United States.
Surveying (CAD and GIS) (Score:3, Informative)
Re: (Score:3, Informative)
Combine that with Open Source GIS software [opensourcegis.org] to query the data source and you're in business.
For this to work, you have to have a huge pool of people willing to drive a lot. Even the big map players (NAVTEQ and TeleAtlas) have problems keeping data up to speed, a
Re:TomTom MapShare (Score:5, Informative)
Unfortunately, this has nothing to do with an "open source project". It is more like:
1. Make something that is so-so.
2. Profit!
3. Let the people who pay a lot of money for this so-so product do work for You without paying them for it. These users will take Your product from the so-so stadium and turn it into a good product.
4. Even more Profit! without any costs.
Reminds me a bit of cddb... What the OP wants is something like Freedb.
Parent
Re: (Score:3, Funny)
Re:TomTom MapShare (Score:5, Interesting)
Personally, I like features like this [gizmodo.com] on TomTom, but yes, an open source database would rock. Even something that pulled from google maps would be cool, IMO, as long as google maps stays free.
Parent
Re:TomTom MapShare (Score:4, Interesting)
The same principle holds true for restaurants. The first couple of bucks will go into food quality and better service. There is a very real difference between a $5 hamburger meal and a $15 steak. But the next $50 will go into square plates, french accents and, of course, exclusivity in the form of missed opportunity costs. You pay for the fact that they might have sold the food to the person currently waiting at the bar.
In this light you'll probably understand how downright stupid it is to share that little known Thai restaurant behind the strip mall with the rest of the planet. Before you know it, hordes of TomTom-toting patrons will crowd your once lovely restaurant. Prices will skyrocket, portions will shrink and before you know it it will obtain a Michelin star and you will have to find somewhere else to eat.
Parent
Note that Mapmakers make intentional mistakes... (Score:3, Interesting)
Folks, be aware that one way that a mapmaker "improves" on a copyright protection is to intentionally alter a small section of a map (and in a book, a few at random) that is hopefully not used. This helps them to prosecute somebody that steals the map information and resells it. Granted, this is known for hard-copy maps, but I believe it is also true for GPS maps as well (call them the "soft-copy" versions).
I can attest to this because near where my parents live on most maps there is a road that appear
Sometimes they're easy to spot... (Score:5, Interesting)
Parent
Re:Sometimes they're easy to spot... (Score:4, Informative)
http://maps.google.com/maps?f=q&hl=en&geocode=&q=Dummy1456&sll=37.0625,-95.677068&sspn=32.80241,75.146484&ie=UTF8&ll=52.784492,-1.615934&spn=0.012225,0.036693&z=15 [google.com]
Parent
Re:Note that Mapmakers make intentional mistakes.. (Score:5, Interesting)
Having mapped a couple of square miles for OpenStreetMap [openstreetmap.org], I can attest to the fact that these alterations are incredibly common on Google Maps. There are half a dozen within half a mile of my house, most being added curves or extensions to dead-end roads and added or removed traffic islands. Google also cunningly add fake roads to the map data which correlate with features which look like roads on the satellite imagery but actually aren't - they're private drives, streams, paths rather than roads through woodland etc. The ones near me wouldn't seriously affect navigation, but some I've seen in the past would. Oh yes, Google Maps is also shifted by about 5m from WGS84 (GPS coordinates) round here, I presume this is intentional too.
Parent
Re:Government involvement (Score:4, Insightful)
I would point out that Government funding is the reason that you are able to A) connect to thousands of computers/websites across the globe right now, and B) the reason that you even have a "computer" sitting on your desk. Ironically, this funding is also the reason that satillites in space can provide us with overhead images that you see in Google Maps and the like as well.
Parent
Re:Depends on the GPS you buy (Score:4, Funny)
Parent