It is possible to playback a previous run. The file can either be a raw NMEA log file or it can be the log file saved by the chartplotter program itself.
The paths in this instruction may be different on your computer!
Here I assume that:
SUNīs java SDK version 1.4.2 is installed in C:\j2sdk1.4.2_05
chartplotter is in c:\java
charts are in c:\charts
log file is in c:\temp\nmea.log
Install java (if you have older than 1.4.2 you need to uppgrade)
Install the chart plotter, see:
Calibrate some charts (I plan to make a wizard so that this step will be more user friendly some day).
Open a dos shell
give the path to java:
give the classpath to chartplotter:
Go to the folder where the chart are stored
Start the chart plotter giving the path to the log file:
java ChartPlotter -rc:\temp\nmea.log
These can be downloded from the download page. These bat files might need to be modified with whatever paths and java versions you use. There are comments in these files so it should be quite self explaining.
Usage: java ChartPlotter [switches] [<file name>]
The name of the file with reference points (charts.dat is default).
The name of the com port to use is <n> (On Windows COM1 is default).
List more switches.
The GPS receiver needs to have an NMEA compatible serial port interface.
NMEA is a one way protocol so the PC can not tell the GPS to start sending NMEA.
Check your GPS receivers documentation on how to start sending data in NMEA
format from your GPS. For Garmin receivers this is done under communication
NMEA is a one way protocol. It is not possible for the PC to order the GPS to start sending positions in NMEA format. This must be done manualy. A common problem.
Here is our list of GPS related sites.
If you like this software please let us know. Send comments or