Blog

A Note About UTM vs LAT/LON

For some reason people seem to get wrapped around the idea that data projected in UTM is superior to unprojected geographic data (i.e. latitude and longitude).  Granted, if you have a desperate need  to make a paper chart, lay it on a table, and measure...
Read More

Depth vs Elevation

When I started writing PFM and PFMABE I was working for the U.S. Naval Oceanographic Office. Our primary goal was to collect and process bathymetric and hydrographic data. We didn’t even look at topographic data… until we started playing around...
Read More