File
Processing
To process a text file of coordinates,
converting them from one coordinate reference frame to another, and/or
transforming them from one datum to another, follow these steps:
1 Select the Open... command from the File menu. A standard
Windows or Motif File Open dialog box will appear.
2. Use the controls in the File Open dialog box
to select an existing text file containing coordinates. Both the Windows and
Motif versions of the File Open dialog box allow you to move up and down the
directory hierarchy, and to filter the list of files displayed. Select the
desired file by either double clicking on its name, or by selecting its name
and then clicking on the OK button. The GEOTRANS File Processing window will
appear. The upper half of the File Processing window displays the input datum,
the input coordinate reference frame type, and any associated parameters that
were specified in the input file header.
3. If the desired output coordinate reference
frame type is not already displayed in the lower half of the window, select the
desired entry from the pull-down list in the lower half of the window. The
lower half of the window will be updated to display the appropriate parameter
fields for the selected output coordinate reference frame type.
4. If the desired output datum, and its
associated ellipsoid, are not already displayed in the lower half of the
window, select the desired datum using the pull-down list associated with the
Datum field near the top of the Output Area.
5. If the output coordinate reference frame type
has any parameters associated with it (e.g. a central meridian), and the
default parameter values displayed in the lower half of the window are not the
desired values, change the parameter values by selecting the displayed values
and typing over them.
6. Click on the OK button. A standard Save As...
dialog box will appear, with the same layout of fields and controls as the File
Open dialog box.
7. Use the controls in the Save As dialog box to
specify the desired name and location for the output file. Output
files should be saved as text files (.txt or .dat). Once the file name has been entered, click on the OK button.
A GEOTRANS File Processing dialog box will appear.
8. Click on the Start button to begin file
processing, converting the coordinates in the input file and writing the
results to the output file. When file processing is completed, a message will
be displayed showing the number of coordinate points processed and the number
of errors encountered. Click on the OK button to return to the GEOTRANS main
window.