This tool allows the conversion and/or transformation of coordinates between different datums and reference systems (CRS).

 

 

To make the calculations, the parameters must be indicated for the reference systems Source  and Target, enter the coordinates and press the Calculate button.

 

For both systems the following data is requested:

 

 

                 

CRS Type: Indicates the type of coordinates. It may be Geographic, Geocentric or Projected.

 

Area: if this box is activated and a country is selected, by pressing the … button the right, this is used as a filter in the selection of the CRS and datum transformations.

 

 

Favourites: This shows the list of coordinates' system configurations predefined for the country selected. They are stored in ASCII files with the extension *.STS in the directory TcpGPS\Geo\STS. New configurations can be recorded by pressing the button .

 

 

Geographic CRS (Geocentric or Projected): Name of the geodetic coordinate system. It must be selected from the list by pressing the  button.

 

 

Geo. Dat. Shift: Transformation of geodetic datums. It must be selected from the list by pressing the  button.

 

 

Vertical CRS: Vertical reference system. It is optional and only makes sense for geographic and projected CRS. It allows the calculation of orthometric altitudes. It must be selected from the list by pressing the  button.

 

 

Ver. Dat. Shift: Transformation of vertical datums. It must be selected from the list by pressing the  button.

 

 

If the target reference system is of the projected type, this will allow the coordinates to be recorded in the current points file, pressing the button .

 

Depending on the type of geodetic CRS established, the following names are shown for the coordinates alignments:

 

Geographic CRS

      Lat

      Long

Geocentric CRS

      X

      Y

      Z

Projected CRS

      E

      N

 

For geographic and projected CRS the orthometric altitude (H) or the ellipsoidal altitude (h) will be shown depending on if Vertical CRS has been selected or not.

 

If the geographic CRS WGS84 or ETRS89 is selected as the origin, the Convert File *.w84 option will be activated on the context menu. This command allows the conversion of a geographic coordinates file to the destination system, creating a new points file (*.PUN).

 

 

The latitude/longitude format of the file *.W84, as well as the explanation in the section GPS Data (DD MM SS.SSSSS N/S/E/W) may be one of the following:

 

+/-DD MM SS.SSSSS

 

+/-DD°MM’SS.SSSSS”