String file of stations
With this function you can create a string file containing the coordinates of selected control stations. The station identifier for each station will be included in the corresponding description field. Constraints can be placed on the selection of control stations.
To run this function: Choose Survey > Reports > String file of stations, or...
Fields on the Create survey station strings form.
Define the output file for strings
Specify the string file to be created by entering the Location and ID number.
String Number
Specify the string number to which the stations are to be written.
Complete the CREATE SURVEY STATION STRINGS form, and choose Apply to display the DEFINE QUERY CONSTRAINTS form.
Table Name
This is the name of the `stations' table and cannot be changed in this form.
Function
This is the name of the function to be carried out.
Field Name
Enter the name of the field upon which you wish to impose field constraints.
Operand
Enter the operation that will define the field constraints. Valid entries for the operand are:
| < | less than |
| <= | less than or equal to |
| > | greater than |
| >= | greater than or equal to |
| <> | not equal to |
| = | equal to |
Constraint Value
Enter the value for the constraint that you wish to apply. For example, you may wish to create a string file containing all stations in particular area with an elevation of 540 and above:
| Field Name | Operand | Constraint Value |
|---|---|---|
| area | = | pit1 |
| z | >= | 540 |
When you have finished supplying constraints, choose Apply from the DEFINE QUERY CONSTRAINTS form to begin extracting those stations that satisfy the constraints to the string file. The SURVEYING menu will be displayed.
Messages
"n" points written to file filename.str
Result
A string file will be generated containing those stations that satisfy the constraint parameters defined.