UTM code

In Turboveg 13 bytes are reserved for the UTM grid codes. The format of the code is:
99-A-AA-99999-99999 ('9' means a numerical value, 'A' an alphabetic character).
An example of such a code is: 31-U-ET 99940-80440

How is the code build up?

• The first two nummers indicate a vertical zone (the earth is divided into 60 vertical zones).
• The next character indicates a horizontal zone (each vertical zone is divided into 8 horizontal zones).
• The next two characters represent a 100 x 100 km grid cell.
• The next 10 numbers represent a grid with greatest precision of 1 x 1 meter (the first 5 numbers is the Eastern representation, the next 5 numbers the Northern representation.  
  • 31-U-ET-9-9 has a precision of 10 x 10 km.
  • 31-U-ET-99-80 has a precision of 1 x 1 km.
  • 31-U-ET-999-804 has a precision of 100 x 100 meter.
  • 31-U-ET-9994-8044 has a precision of 10 x 10 meter.
  • 31-U-ET-99940-80440 has a precision of 1 x 1 meter.

Sometimes distribution data is presented in a 50 x 50 km grid In this case the 100 x 100 km grid cell is divided into 4 cells. As indicated in the table below, each 50 x 50 km is identified with the number 1,2,3, or 4.

1	3
2	4

An example of such a code could be 31-U-ET-1

If, for example '31-U-ET-1' is entered in Turboveg, the program will recognize this code as a 50 x 50 km grid cell.  However, if possible, it is recommended to enter the more precise grid codes, as indicated above. Without loosing information a simple transformation to 50 x 50 km grids for drawing maps is always possible .