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Thread: OpenSource Map Vector Data

  1. #11
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    Quote Originally Posted by god_of_cpu
    Navteq is perfectly willing to sell you the data, they are not a retail outlet though so you have buy in quantity. Saying that its ridculous that Navteq doesn't sell to end consumers is the same as saying its ridculous that intel won't directly sell you a single processor. Yeah I'm sure all distributors would love to sell directly to consumers, however, when you do that you take half the buisiness away from your resellers with the people who prefer cheapness over convienience. Your resellers then go out of buisiness cause half thier customers are gone so you then lose your resellers and half of your business cause most people don't want to deal with buying raw data and figuring out how to make it work.

    You can't just give away map data, its expensive to make and expensive to maintain. Unless the goverment releases data good for navigation, you will always have to pay for good up to date map data.
    Great Points in relation to Navteq's business strategies. I eluded to some of the possible reasons nobody sells data to end users in my post. But we 100% agree on the major point. If we're waiting for someone to provide us with a cross platform and affordable map database, we will be waiting for a long time. Best solution: make our own.

    I think everyone underestimates the quality of the Tiger data. It sucks from a routing usability standpoint, but the information needed to do the routing is there. It just needs to be in a more usable format. I can guarantee that the majority of Navteqs routing information comes from this data. It would be insanity to drive all around the U.S. and attempt to characterize routing information for every intersection. They do attempt to do this type of stuff for some high traffic and confusing areas like around airports, but for the most part, their data has a large number of routing problems as well.

  2. #12
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    I would love to have the map data available in a more usable format... some database format that can be moved and translated to other database formats would be great... for instance MySQL for web applications. With the correct data it would be totally possible to create a flash based mapping software or other. It would open up a lot of possibilities! I tried a long time ago to look through and try to decipher the tiger map data. Its just a very confusing format. If a script can be written to convert/import it into a database that would be great!

  3. #13
    Raw Wave god_of_cpu's Avatar
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    Quote Originally Posted by s003apr
    It sucks from a routing usability standpoint, but the information needed to do the routing is there.
    What are you going to do to get around the lack of directional information for one-way streets etc?
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  4. #14
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    Quote Originally Posted by god_of_cpu
    What are you going to do to get around the lack of directional information for one-way streets etc?
    If you can edit the database to give that type of info, why not have the users update the information. When they find something that is different to the DB send the required info to the person in charge of the database to get it updated. Then the DB info gets updated say every couple of months. It is in the users interest to give the correct info. Just a thought
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  5. #15
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    Quote Originally Posted by pablosbrain
    I would love to have the map data available in a more usable format... some database format that can be moved and translated to other database formats would be great... for instance MySQL for web applications. With the correct data it would be totally possible to create a flash based mapping software or other. It would open up a lot of possibilities! I tried a long time ago to look through and try to decipher the tiger map data. Its just a very confusing format. If a script can be written to convert/import it into a database that would be great!
    I initially tried my projects with mysql and postgresql. In many ways they are overkill for this project from both a administration and features standpoint. Gigabase and sqlite both of support for limited subsets of SQL, however they do not have the heavy admin burden, they are small and crossplatform.

    The tiger data is not that difficult, the documents are full of lots of fluff so you just have to narrow it down to the important info.

  6. #16
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    *ahem*....question...has anyone taking a look at reverse-engineering garmin data? Also wouldn't sqlite be kind of hard to scale?

  7. #17
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    Quote Originally Posted by pmow
    *ahem*....question...has anyone taking a look at reverse-engineering garmin data? Also wouldn't sqlite be kind of hard to scale?
    They probably used tiger data to create garmin data.
    Also, I am not an experienced programmer and do not know a lot about scaling, but the fact that sqlite and gigabase are designed for professional database use and support database sizes in terabytes indicated to me that they would certainly scale better than any home-brewed solution that I could come up with on my own.

  8. #18
    Variable Bitrate AlienEclipse's Avatar
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    I'm not to familiar with Tiger. Can it be used for countries outside of the US, as it appears to be only for the US.
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  9. #19
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    If anyone is interested, some of the work has already been done.

    http://sumitbirla.com/software/tmrs.php

    I have not had the time to work on it lately. Feel free to build on top. I even have a decent routing algorithm coded.

  10. #20
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    Quote Originally Posted by sumit_b
    If anyone is interested, some of the work has already been done.

    http://sumitbirla.com/software/tmrs.php

    I have not had the time to work on it lately. Feel free to build on top. I even have a decent routing algorithm coded.
    Sumit:
    I remember you from theXCar. I told you that I would work on a database, it just took me a lot longer than I planned to get something going (Stinking jobs these days actually expect you to show up). I was working the Postgresql/Postgis for a long time, but the thing has so much administrative demand that I decided it would be total crap for any type of casual user. I had to start fresh with Gigabase and I am rather optimistic about it. I am starting up a sourceforge project called NavDB. It will take a few days to be approved but shortly after I hope to have some of the simple scripts I have written to create the database in CVS. After seeing what you were able to do with the tiger data maybe you can give me some feedback on how to better present that data.

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