iPOGO V5 Users Group - Help Manual

*Methodology*
Command:	-42
Alpha Alias:	List SSCtrlLatDep
Description:	Prints stakeout ties as latitudes and departures from pre-defined traverse points
Data Format:	-42 Max-Tie-Length Point# {[Point#] ... } ;
Problem:	Given traverse stations 121, 122, 123 (stored in command 41) compute the nearest two ties to points 1, 2, 3 and 4. Print the latitudes and departures of the ties.
Solution:	-42 60 1 -4 ;

Data Description

Command	-42	Computes the nearest two ties from traverse stations previously stored with the 41 command to any point number. Prints stakeout ties as latitudes and departures. You must have defined traverse stations using the 41 command before executing this command. For each point number you enter with the -42 command, the two nearest stakeout ties will be printed; however, only one tie will be printed if one of the nearest ties exceeds the indicated maximum tie length. If both ties exceed the maximum, no tie is printed for that point number. The -42 command produces printout only. In Version 5, this command has been modified to compute estimated accuracy at the 95% confidence level using the FGDC NSSDA Root Mean Square Error (RMSE) formulas. This is typically used in GIS to determine estimated mapping accuracy by comparing known or computed control points with corresponding digitized photo points. Each point defined in the 41 command must correspond to no more than one point in this command for the summary to be correct.
Max-Tie--Length	60	Specifies a length beyond which ties will not be computed.
Point#	1	Any previously computed point except those stored using the 41 command.
{[Point#]..}	-4	Repeating feature of this command. Enter additional point numbers for which you want ties to be computed. If you want to define a series of sequential points, enter the first and last points in the series. The last point number must be preceded by a hyphen. Example: 1 -50 would define the range for points 1 through 50, inclusive.
End Command	;	All commands end with a ; (semi-colon).

Example Command File

$ Example data file for -42 (List SSCtrlLatDep) command

$ set initial points
  0 121 0 0 ;
  1 122 121 -1 56 30 30 66.32
            -2 52 23 56 99.50 ;
  2 1 121 121 122 40 30 20 35.17 ;
 -2 2 122 122 123 95 10 15 29.67 
                  74 10 15 10.21
                  18 15 14 50.00 ;

$ Setup feature codes with the 15.1 command
$  cmd  feature, layer, color, style, thickness 
   15.1  TL      TRAVLINE  3      1       20000 ; 
   15.1  PL      PROPLINE  1      1       20000 ;
   15.1  SO      STAKEOUT  4      1       20000 ;

$ Turn plot on
  91 ;

$ Activate the TL feature code with the 15 command
  15 TL ;
     100 Traverse Line ;
         7,1 121 -123 ;

$ Activate the PL feature code with the 15 command
  15 PL ;
     100 Property Line ;
         7,29 1 -4 ;

$ Turn plot off
  -91 ;

$ Define stakeout control using the 41 command
  41 121 -123 ;

$ Stakeout points 1 through 4 using the -42 command
$ where located within 60 of a traverse point
$ as identified in the 41 command

100 Stakeout points 1 -4 with latitudes and departures;
    -42 60 1 -4 ;

Help for this command was last updated: 08/05/2001 6:16:33 PM

iPOGO V5 Help Manual On-Line

Group:Command:

40) Stakeout-42 or List SSCtrlLatDep

Group:
Command:

40) Stakeout
-42 or List SSCtrlLatDep