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#54106 - 28/01/2002 15:07 Re: GPS nav [Re: Yang]
mandiola
enthusiast

Registered: 26/12/2001
Posts: 386
Loc: Miami, FL - Sioux Falls, SD
What about this, a gps app with moving maps that was written for an ipac handheld running linux. http://cvs.handhelds.org/cgi-bin/viewcvs.cgi/apps/pygps/
; D

-Greg

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#54107 - 28/01/2002 15:10 Re: GPS nav [Re: mandiola]
Yang
addict

Registered: 14/01/2002
Posts: 443
Loc: Raleigh, NC
Need to get python running on the empeg.. or someone to port it. (I've done some python hacking in the past, but am not an expert..)

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#54108 - 28/01/2002 15:15 Re: GPS nav [Re: mandiola]
Yang
addict

Registered: 14/01/2002
Posts: 443
Loc: Raleigh, NC
Looking at the code, it seems to be simply a program that takes a map image and selects a screenful depending on where the GPS says you are.

Edit: I suppose you could do the same thing on the empeg, though the resolution doesn't help. You really need a map-render as you want to show what's in front of you, not just a a section of the map around you. You'd have to limit it to a 32x32 square to get equal coverage.. If you render, you can do a 64x32 square of the road infront, with compas/location information on the right half..


Edited by Yang (28/01/2002 15:57)

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#54109 - 28/01/2002 18:16 Re: GPS nav [Re: Yang]
mandiola
enthusiast

Registered: 26/12/2001
Posts: 386
Loc: Miami, FL - Sioux Falls, SD
Hmm.. this is the final thing i've seen that comes close to what were trying to do. http://fritz.ganter.at/software/
, GpsDrive.

-Greg

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#54110 - 28/01/2002 18:34 Re: GPS nav [Re: mandiola]
Yang
addict

Registered: 14/01/2002
Posts: 443
Loc: Raleigh, NC
Well, this does the same thing.. It takes an image and displays the GPS data over it.

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#54111 - 29/01/2002 03:51 Re: GPS nav [Re: Yang]
ray951
new poster

Registered: 24/12/2001
Posts: 25
Loc: UK
If you want to start with something simple then have a look at this software http://freespace.virgin.net/patrick.fox/codriver/ , note that it is designed to run on Psion 5MX but I thought the concept was quite good.
It worked by taking a file or files containing a list of directions with distances from the start point and as these distances were reached the display would change. The data was taken from MS Autoroute or the Psion Streetplanner and Routeplanner software but I guess it would work with any text file containing the data in the correct format.
Obviously it can't recaculate on the fly so if you take a wrong turning it doesn't work until you can tell it where you are on the original route, but for something basic I thought it was quite good.
Ray

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#54112 - 29/01/2002 04:42 Re: GPS nav [Re: Yang]
andy
carpal tunnel

Registered: 10/06/1999
Posts: 5778
Loc: Wivenhoe, Essex, UK
Interestingly the empeg interface was originally going to be scripted in Python, but they had to give up on that idea when they had problems getting it to run reliably. If I remember rightly it had problems with the realtime scheduling that the empeg uses.
_________________________
Remind me to change my signature to something more interesting someday

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#54113 - 29/01/2002 07:03 Re: GPS nav [Re: andy]
altman
carpal tunnel

Registered: 19/05/1999
Posts: 3452
Loc: Palo Alto, CA
There were issues with priorities, multi-threading, and memory footprint/mlock() issues.

Hugo

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#54114 - 29/01/2002 13:52 Re: GPS nav [Re: Yang]
eternalsun
Pooh-Bah

Registered: 09/09/1999
Posts: 1721
Loc: San Jose, CA
That depends. If the EULA indicates reverse engineering is illegal, and you agreed to it at time of use, then it is illegal.

Calvin

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#54115 - 29/01/2002 13:57 Re: GPS nav [Re: eternalsun]
tonyc
carpal tunnel

Registered: 27/06/1999
Posts: 7058
Loc: Pittsburgh, PA
Unless the EULA is illegal, and there's been more than a handful of instances where that's occurred recently. EULA's have all sorts of crap in them.
_________________________
- Tony C
my empeg stuff

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#54116 - 29/01/2002 14:54 Re: GPS nav [Re: eternalsun]
Yang
addict

Registered: 14/01/2002
Posts: 443
Loc: Raleigh, NC
None of the map files I downloaded had EULA's attached to them. The only document I found was on microsoft's website, but that was about the site itself. There was no requirement that I had to agree to it to download the maps. So even if the EULA said I couldn't, I wasn't bound by it.

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#54117 - 30/01/2002 16:56 Re: GPS nav [Re: tigloo]
smu
old hand

Registered: 30/07/2000
Posts: 879
Loc: Germany (Ruhrgebiet)
Hi.

I wanted to post this earlier today, but the PC I was working on wasn't fitting the BBS's requirements (probably the missing reverse DNS resolution).

I didn't get any valuable feedback from TeleAtlas yet. I think they won't come up with a deal that was in our range (below 250$/CD), so I think the only way left would be to contact BlauPunkt (the copyright holder on the navigation-CD format specs) and to get a license to use their navigation CDs (which are sold in different formats for the US and Europe at least, like Rob found out the hard way). However, I will be honest: I don't have the time to find the right contact at Blaupunkt and I certainly don't have the time to negotiate a deal with them. So if there is any volunteer: Please, please go ahead.
I will stand by my promise to try and negotiate a deal with TeleAtlas however, I will find the time to do that. But like I said before, I don't think this will turn out well. As it seems, the cost will be so high that the rather few people who expressed interest in this project will not be interested in it. It seems as if the costs would be at about 500$/CD, which is certainly to high for me.

cu,
sven
_________________________
proud owner of MkII 40GB & MkIIa 60GB both lit by God and HiJacked by Lord

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#54118 - 30/01/2002 17:02 Re: GPS nav [Re: smu]
mandiola
enthusiast

Registered: 26/12/2001
Posts: 386
Loc: Miami, FL - Sioux Falls, SD
Hmm, I can't seem to find anything else. For 500 i'd almost rather get a built in gps with a screen ; / Hopefully we can find something cheap.

-Greg

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#54119 - 30/01/2002 17:10 Re: GPS nav [Re: mandiola]
smu
old hand

Registered: 30/07/2000
Posts: 879
Loc: Germany (Ruhrgebiet)
Hi.

I really think the best bet is to get a license to use the BlauPunkt CDs. They are sold worldwide (though using different formats, but still in a format defined and copyrighted by BlauPunkt), they can easily be bought by the end user, they have (rather) complete and exact data. Also, we certainly aren't any kind of competitor to them. I guess if we would throw some money together and signed a NDA, we _could_ _possibly_ get a license to do this.

cu,
sven
_________________________
proud owner of MkII 40GB & MkIIa 60GB both lit by God and HiJacked by Lord

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#54120 - 02/02/2002 11:26 Re: GPS nav [Re: smu]
mandiola
enthusiast

Registered: 26/12/2001
Posts: 386
Loc: Miami, FL - Sioux Falls, SD
Kim.. anyway I could get you to send me over a copy of something that just shows simple stuff like direction, etc on the empeg? I just wanna get everything configured in my car '; )

-Greg

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#54121 - 28/04/2002 19:20 Re: GPS nav [Re: rcldesign]
Terminator
old hand

Registered: 12/01/2000
Posts: 1079
Loc: Dallas, TX
What are you guys using to open and view tiger data? I need to open it and combine it with other data.

Thanks,

Sean

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#54122 - 02/05/2002 06:13 Re: GPS nav [Re: Terminator]
grgcombs
addict

Registered: 03/07/2001
Posts: 663
Loc: Dallas, TX
I've always just used their web site for viewing the maps ... I'm totally unfamiliar with how to examine the file directly.

My guess on combining it would be to have an application savvy enough to change directories/files to the new map once it reaches the end of the previous.

g
_________________________

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#54123 - 02/05/2002 07:56 Re: GPS nav [Re: grgcombs]
Terminator
old hand

Registered: 12/01/2000
Posts: 1079
Loc: Dallas, TX
Ive found some companies that sell the data in usuable form already. I can view some road data here: http://edcnts14.cr.usgs.gov/Website/store/viewer.htm , but I can only download the national land cover info and elevation data.

Sean

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