HowTo: Navigate to Lat/Lon with TTN4 and TTN5

Muzy · Occasional Visitor Joined: May 08, 2004 Posts: 1

[quote="gilbem1"]I have received my French holiday destination GPS co-ordinates from the holiday company, but when I create an ITN (as described in this link) file with them in, they appear in amber with a line through them and the option to <Show on Map> is greyed out.

Could someone who knows how, please check for me where the hell in the world these co-ordinates refer to, as I'm sure the XY details are not in France.
Listed below as per their brochure !

Site 1: X: -151200m Y: 5410000m 43:49:58N 1:21:31W
Site 2: X: 1800m Y: 5946300m 47:13:04N 0:00:57E

Posted: Tue Jul 05, 2005 12:36 am Post subject:

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[Quote] simply recalculate the lat/lon values into decimal representation and then multiply by 100000

I have the same problem - but different sites in France! As a complete novice to using lat/long (but not TTN) my question is how do I recalculate the lat/long values into decimal representation?

Apologies if this is a stupid question, but if you don't ask, you'll never learn!

Thanks

julianbarker · Lifetime Member Joined: Apr 12, 2005 Posts: 431

Simply devide seconds by 60 to get decimal minutes and divide decimal minutes in the same way to get decimal degrees -

N43:49:58

58/60 = 0.9666666667 minutes

49.96666666667/60 = 0.8327777778 degrees so

N43:49:58 = N43.8327777778 in decimal degrees format.

Note I have reduced these to ten decimals - the numbers are much longer than that!

julianbarker · Lifetime Member Joined: Apr 12, 2005 Posts: 431

Now for the next bit - N43.8327777778 IIRC needs to be converted to a decimal of the 90 degrees from the equator to the North Pole -

Divide by 90 and you get 0.48703086419755555555555555555556

Multiply by 100000 and you get 48703.

By convention N and E are positive values S and W are negative. Note that in E and W there are 180 degrees, not 90.

Personally, to avoid all this I would use something like POIEdit that does all the work for you.

If any of this is wrong - please feel free to correct, I am only going from memory.

julianbarker · Lifetime Member Joined: Apr 12, 2005 Posts: 431

Now for the next bit - N43.8327777778 IIRC needs to be converted to a decimal of the 90 degrees from the equator to the North Pole -

Divide by 90 and you get 0.48703086419755555555555555555556

Multiply by 100000 and you get 48703.

By convention N and E are positive values S and W are negative. Note that in E and W there are 180 degrees, not 90.

Personally, to avoid all this I would use something like POIEdit that does all the work for you.

If any of this is wrong - please feel free to correct, I am only going from memory.

Pedro-G · Posted: Fri Jul 22, 2005 6:34 am Post subject:

How about the other way round (compared to the original topic of this thread)?

What would be the most convenient way of finding the coordinates of a given spot on TomTom 5's map, or an address? Would you save it as a favorite, create an itinerary starting from there, or what? And then how to see the coordinates?

Oldboy · Posted: Fri Jul 22, 2005 8:12 am Post subject:

barryd · Posted: Mon Jul 25, 2005 8:09 pm Post subject:

Just a note that OS GPS Convertor 2.1 is out. It includes a couple of minor tweaks/enhancements for TomTom users.
Please post any comments about it in this other thread:
http://www.pocketgpsworld.com/modules.php?name=Forums&file=viewtopic&p=131270#131270
_________________
Barry Davies

ncsl · Occasional Visitor Joined: Aug 06, 2005 Posts: 2

Is there a way using TT Nav 5 with HP IPAQ to save as POI any current positions.
I would like to save POI or Lat/ Lon as I travel along on rivers and esteuries so I can reuse these on the return journey?
Thanks

Oldboy

hyjacks · Occasional Visitor Joined: Jul 07, 2005 Posts: 29

thank you very much i was wondering how to do this with tt5. this program makes it very easy yipeeeeeeeeeeeeeeee save me loads of time.

SparksSailor · Occasional Visitor Joined: Sep 23, 2005 Posts: 1

How can I complete remove OS GPS Converter from the PDA?

barryd · Posted: Fri Sep 23, 2005 10:12 pm Post subject:

Hi there
To remove it, simply delete whichever files you installed. The following list shows all files you may have installed and any other files it may have created:
- OS GPS Convertor.exe program file
- Shortcut to the program file
- osgps.ov2 and osgps.bmp files in the TomTom map folder
- osgps.itn file in the TomTom itinerary folder
- osgps.dat and osgps.bmp files in the Destinator favorites folder
- apidata1.$$$ file in the OziExplorer program folder
It saves your option settings and the last position entered in the registry. Should you want to delete them (personally I wouldn't bother, they'll do no harm left there and take up very little space) you'll find them in:
HKEY_CURRENT_USER\Software\OS GPS Convertor
Hope this helps
_________________
Barry Davies

freddan · Occasional Visitor Joined: Sep 04, 2005 Posts: 12

newbie here....

I made a new ITN-file with coordinats. When I open it up in TT5 I have a red line crossing my new entry and I cannot do "Show on map".

I´m doing something wrong here....

//F

barryd · Posted: Fri Sep 30, 2005 6:50 pm Post subject:

Hi freddan
The red line indicates that this position is not within the area covered by the map currently loaded in TomTom. So you need to either load a map for that area, or check your coordinates as they may not have been entered correctly.
Assuming you're using my utility, by all means post an example of a position you want to enter and how you're doing it, and I'll try to be more help.
Best wishes
_________________
Barry Davies

freddan · Occasional Visitor Joined: Sep 04, 2005 Posts: 12

Thanks for your reply.
No I´m not using your app.....live in Sweden.

I´ll check everything one more time to see whats up...

/Freddan

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