Geotrans 2.4.2 Release Notes

1. Corrected an error in the MGRS and USNG modules that incorrectly mapped 100,000m square row letters to northing values in the northern portion of the X latitude band (northings > 9,000,000m).

2. Revised the handling of warnings reported by the Transverse Mercator (TM) module for points located more than 9 degrees from the central meridian, when the TM module is invoked by the UTM and MGRS modules, so that UTM or MGRS error checking takes precedence.

3. Added datum domain checks for those cases where no datum transformations are performed. Previously, coordinates were not checked against the valid domain of the datum when the input datum and output datum were identical.

4. The default accuracy estimate values for DTED Level 1 and DTED Level 2 were updated to be consistent with MIL-PRF-89020B, Performance Specification, Digital Terrain Elevation Data (DTED), 23 May 2000, replacing the values from MIL-PRF-89020A, 19 Apr 1996. Default spherical accuracy estimate values for all relevant data sources were updated to reflect a more accurate relationship to the corresponding circular (horizontal) accuracy estimates.

5. In the GEOTRANS application, added commands to save the current selections and options settings as the defaults, and to reset the current selections and options settings from the defaults.

6. In the GEOTRANS application, added capabilities to create and delete user-defined 7-parameter datums.

7. Corrected a problem with the checking of input coordinates against the valid region for a local datum when a longitude value greater than +180 degrees was entered.

8. Corrected the valid regions for the PUK and NAR-E datums to use a range of longitudes that span the +180/-180 degree line.

Document last modified August 11, 2009