Mapping - converting gdb files to gpx

Submitted: Monday, Dec 02, 2013 at 09:39
ThreadID: 105343 Views:1484 Replies:4 FollowUps:6
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A gdb file (track & waypoints) recorded on Garmin City Navigator is 1.3mb. I resaved it as a gpx file so I can open it in Ozi but it is now 6.73mb. This is ridiculous!
Is there any other way of converting gbd files to gpx without such an increase in size?
Many thanks,
Rob
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Reply By: equinox - Monday, Dec 02, 2013 at 09:52

Monday, Dec 02, 2013 at 09:52
Hi Rob,

Once you have the file in Ozi, you can resave as separate track and waypoint files. This will reduce the size.

I don't really know much about Garmins so not sure if you can do an easier direct conversion.

Cheers
Alan

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Reply By: Robin Miller - Monday, Dec 02, 2013 at 12:00

Monday, Dec 02, 2013 at 12:00
Before you save it Rob , you can use filter option in Garmin city Nav , track properties , there are several filter options based on distance points etc.

Typically GPX is about 5 times the size of Gbd , and I can typically filter my tracks to about 1/4 sizein points and still keep accuracy so when saved back as Gbd its only about 1/3rd bigger

Size reduces proportionally this way and you can otimize as you wish.
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Follow Up By: Navigator 1 (NSW) - Monday, Dec 02, 2013 at 12:09

Monday, Dec 02, 2013 at 12:09
Thanks Robin, This is all very confusing to me but I will have a go.
Rob
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Follow Up By: Robin Miller - Monday, Dec 02, 2013 at 12:27

Monday, Dec 02, 2013 at 12:27
Dont hesitate to ask for more exact instructions Rob.

It can be a pain if your system saved 30 tracks and you have to filter each one first for example.

A cute trick is to open up a second copy of city navigator and copy and paste just the stuff you want across , and depending of how many you can use the join command to create one big track and then its all easier.
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Reply By: get outmore - Monday, Dec 02, 2013 at 12:09

Monday, Dec 02, 2013 at 12:09
have you tried

Img2ozf

if it wont convert gdb to ozf4 if might do GPX - im not 100% sure
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Follow Up By: Navigator 1 (NSW) - Monday, Dec 02, 2013 at 12:14

Monday, Dec 02, 2013 at 12:14
How do I go from gbd to Img2ozf?
Rob
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Follow Up By: The Explorer - Monday, Dec 02, 2013 at 12:46

Monday, Dec 02, 2013 at 12:46
Hi

Img2ozf is an image converter - we are talking waypoints and tracks here. You cant convert waypoints and tracks to OZF format.

As others have suggested - the only way to reduce file size would be to break the single file up into smaller files (e.g. waypoint and tracks ...and them maybe waypoints and tracks for each day) ...though the combined total size wont be less or...

Plan B - filter track points out (I would not do this as it reduces quality of your track recording - but depends what you are using the data for).

I personally would just keep it as is - 6 mb isn't that big in this day and age (= to less that two digital photographs)


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Greg
I sent one final shout after him to stick to the track, to which he replied “All right,” That was the last ever seen of Gibson - E Giles 23 April 1874

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Follow Up By: get outmore - Monday, Dec 02, 2013 at 14:33

Monday, Dec 02, 2013 at 14:33
ah sorry I misread - right you are
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Reply By: Life Member - Fred B (ex-NT) - Monday, Dec 02, 2013 at 14:05

Monday, Dec 02, 2013 at 14:05
Hi,
have you got your PC and Oziexplorer set up so that it that it recognises your GPS when connected? If so, open Ozi and you will see a menu "Garmin", click on that and you get a drop down selection. Import and edit your waypints and save. Then import, edit your tracks and save. You can also export them to the GPS seperately if needed. GPX files might be larger, but they are easier to manage and easily transportable to other gps or PC etc.
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Fred B
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Follow Up By: Navigator 1 (NSW) - Tuesday, Dec 03, 2013 at 09:55

Tuesday, Dec 03, 2013 at 09:55
Hi Fred, Ozi and GPS are set up to talk to each other. Only problem is the track/s and waypoints have already been transferred from the Garmin GPS to City Navigator on the PC so I'm now trying to work backwards. It was a 3,500km track with many, many waypoints so its a bit too big to put it back on the GPS and try again.
Not to worry, I will remember this for next time.
Many thanks, Rob
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