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 * README for mb_out_nav
 * A simple interface between MB-System and gdal/ogr
 * Outputs multibeam navigation to GDAL/OGR supported vector format
 * Includes fields for filename, year, Julian Day, 
 * Line Length (seconds), and Line Length (kilometres)
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1. Requirements
Program requires MB-System, GDAL/OGR, and GTK+ development files installed

2. Installation
  a) Edit Makefile to set prefix to MB-System install location.

  b) Run make

  c) Run "make install" to install mb_out_nav in MB-System bin directory.

3. Usage
Run mb_out_nav -i list_file -o out_name
where list_file is an MB-System file list (name, id, weight) and out_name is the name of the output vector. 
The vector format is determined from the file extension (e.g. .shp for Shapefile, .kml for KML file).

Can optionally use -n nav_channel -p out_projection
where nav_channel is the navigation channel to output 
out_projection is the projection string or filename used to re-project 
navigation.

Can optionally use -f to use "fast navigation" (.fnv) if it is available.
Can optionally use -e to use "edit navigation" (.nve) if it is available.


For more information on supported projection arguments see the GDAL 
man page at http://www.gdal.org/gdal_utilities.html

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Update: September 5, 2012
Added new -f flag to use "fast navigation" if it is available.
Added new -e flag to use "edit navigation" if it is available.
Minor code cleanup.

Update: July 4, 2012
Added math lib (-lm) to libs. (Gordon Keith)
Changed Filename attibute to Name for improved display in GoogleEarth. (Gordon Keith)
