[Gpsbabel-misc] Lowrance USR Duplicate Waypoints

[Steve N. <st...@la...>]

Hello. I just found GPSBable so I am still learning the ropes but I hope
someone can help me with this question. We are developing a web based
application where a user can create a waypoint on the application and I
would like them to be able to "sync" this data with their GPS. Right now I
am doing some experimentation on my Lowrance iWay 350c. So what I did is
save the current waypoint information on the GPS unit to the data.usr file
on the MMC card. I pop the MMC card into my computer, convert it to GPX XML
format, add new waypoints, convert it back to a data.usr file on the MMC
card and then put it back in my GPS unit and then load the data off the MMC
card to the GPS. What I am seeing now is duplicate waypoints listed on my
GPS. Specifically the Waypoints I previously created on the GPS itself. So
when I reload the data.usr file, it does not overwrite the existing, exact
same waypoint and now I have a duplicate. Any suggestions on "synching" the
GPS with our application and avoiding duplicate waypoints?

 

Thank you,

 

Steve Novak

Lake-Link, Inc.

st...@la...

262-264-0402 (office)

262-264-0312 (fax)

http://www.lake-link.com