January 8, 2007 09:53
I have used this in the past with good results:
http://www.gpsy.com/index.html
It is oriented more toward general purpose. For instance, you can scan paper maps or photos and "roll your own" digital maps based on (scaled from) points you have recorded with your own GPS unit .
However, for marine use it has no where near the functionality of GPSNavX.
The code is newly updated for OSX and is now Universal.
http://www.gpsy.com/index.html
It is oriented more toward general purpose. For instance, you can scan paper maps or photos and "roll your own" digital maps based on (scaled from) points you have recorded with your own GPS unit .
However, for marine use it has no where near the functionality of GPSNavX.
The code is newly updated for OSX and is now Universal.