Extracting information from Delorme GPL files

Dan Robinson

Dan Robinson

EF5
Joined
Jan 14, 2011
Messages
3,336
Location
St. Louis
Has anyone had any success with extracting information from GPS points (time, speed, lat/lon) from Delorme GPL files? There are KML converters online that plot the logs on a Google map, but I can't find anything to extract time and speed information from each point along the trail.

I found this freeware converter:

http://www.frontiernet.net/~werner/gps/

This converted everything to a CSV file, but the data was intermittently gibberish. It converted roughly 1/10th of the file correctly, but the rest of the dates and times were wrong, crazy speed values in scientific notation (like -2.28444541269632E+189), etc.
 
I use http://www.gpsvisualizer.com/

It has a ton of conversion formats, including text output of all the parameters you mentioned. It's also free.

If your data look wrong, chances are the file was corrupted or your data just weren't obtained properly. I've had no problems with the site above.
 
Thanks Jeff, I'd used that site before, but could never get it to plot points with time and speed data. Now that I take another look at it, I see that it can be done with some tweaking.
 
You can actually convert to a GPX file within Street Atlas itself. At least, on my version, SA2008.

1. Click Draw tab
2. Click File button
3. Click Import button
4. Select GPL file
5. Once it's loaded (should display your track on the map), click Copy To button, and choose Track
6. A new layer should appear (e.g., "TrackLayer1"). Make sure it's highlighted and click Export
7. Save the track as GPX

This is the process I've been using, anyway. Not sure if there's a more efficient method and/or if it might have changed in more recent versions.
 
Interesting tidbit, Brett. Worked on my version (2009+) pretty much verbatim.

I see that Google Earth can open GPX files. I tried doing that with one of my logs, but nothing appears to be happening. What should I expect to find? Am I missing a step?
 
OK, GPSvisualizer works, but I have not been able to successfully create a map showing discrete points with speed and time stamps. All I can get is the map with the trail. I followed the site's instructions to add a 'name' column to the spreadsheet and change the "T" field to "W" (for Waypoints), but when I do that, I just get a single point on the map with no track and no other points. Has anyone else figured out how to do this? It would be helpful to be able to click on any waypoint and see the time and speed at each point.
 
I was able to create a kml file of your chase route each point is shown with a label showing time, azimuth and speed of travel. (hh:mm:ss aaa.a ss.s) It's a 13.4 Mb file I just need to know where to sent it.
 
Thanks Rob, how did you accomplish that? Did you have to do something to the spreadsheet file, or is there an import/conversion utility somewhere? Ultimately I'd like to do this to all of my chase logs.
 
It’s kind of a multistep process using a program calledExpertGPS and MS Excel.
ExpertGPSwill import the DeLorme GPL file as a track.
A TrackPointlist is then generated and the points are then converted to waypoints.
Thewaypoint list is then selected and copied into MS Excel.
The point labels are created inExcel by combining values in the Time, Heading and Speed.
The Lat, Long and Label (the Label is initially blank) columns are selected and copiedback into ExpertGPS. ExpertGPS allowsyou to assign corresponding values to their proper fields. The modified data is then exported as aGoogle Earth KML file.
 
You must log in or register to reply here.
Back
Top