cdm/src/main/java/ucar/unidata/geoloc/projection/UtmProjection.java
public static void main(String arg[]) {
    UtmProjection utm = new UtmProjection(17, true);
    LatLonPoint ll = utm.projToLatLon(577.8000000000001, 2951.8);
    System.out.printf("%15.12f %15.12f%n", ll.getLatitude(), ll.getLongitude());
    assert Misc.nearlyEquals(ll.getLongitude(), -80.21802662821469, 1.0e-8);
    assert Misc.nearlyEquals(ll.getLatitude(), 26.685132668190793, 1.0e-8);
  }
public static void main(String arg[]) {
    UtmProjection utm = new UtmProjection(17, true);
    LatLonPoint ll = utm.projToLatLon(577.8000000000001, 2951.8);
    System.out.printf("%15.12f %15.12f%n", ll.getLatitude(), ll.getLongitude());
    assert Misc.nearlyEquals(ll.getLongitude(), -80.21802662821469, 1.0e-8);
    assert Misc.nearlyEquals(ll.getLatitude(), 26.685132668190793, 1.0e-8);
  }
/*
roszelld@usgs.gov
'm transforming coordinates (which are in UTM Zone 17N projection) to
lat/lon.

If I get the ProjectionImpl from the grid (stage) and use the projToLatLon
function with {{577.8000000000001}, {2951.8}} in kilometers for example, I
get {{26.553706785076937}, {-80.21754983617633}}, which is not very
accurate at all when I plot them.

If I use GeoTools to build a transform based on the same projection
parameters read from the projectionimpl, I get {{26.685132668190793},
{-80.21802662821469}} which appears to be MUCH more accurate when I plot
them on a map.