Grid Strings
The end result of processing the grid data is to create string files. A number of options are provided for the creation of strings, but firstly you must define the subgrid to be extracted.
To run this function: Choose File tools > Grid tools > Generate strings from grid, or...
Current grid dimensions
Display only.
Select a subgrid
X and Y, Minimum and Maximum
Initially you must define the sub-grid from which you intend to extract strings. If you accept the defaults displayed, the entire grid will be selected.
Define file to create
The Location and ID number of the string file to be created must be entered.
Ignore NULL values in grid
You may choose to ignore grid points with `null' Z values, in which case the coordinates of such points will not be written to the string files. If you choose not to ignore `null' values, those grid points are written to the string file with a Z value of zero, and the stored description field values.
Methods for creating strings
Select the method
The strings which are to be created must be defined.
| Method | Produces |
|---|---|
| 1 | A single string which contains all the required grid points. This will be string 1. |
| 2 | A single string for each row in the grid. The string numbers start at 1 and increment by 1 for each row in the grid. String 1 will be the most southerly row in the specified subgrid. |
| 3 | One single string for each column in the grid. The string numbers start at 1 and increment for each column in the grid. String 1 will be the most westerly column in the specified subgrid. |
| 4 | One closed segment per cell in the grid. A closed segment is produced for each cell in the grid and the string number for each segment will be 1. |
Result
The string file will now be created with the strings and points as specified.