iPOGO V5 Users Group - Help Manual

*Methodology*
Command:	-36
Alpha Alias:	-BestFit Deed
Description:	Adjusts deed figure based on best two point comparison
Data Format:	-36 Tolerance Deed-Pt Field-Pt {[Deed-Pt Field-Pt].. } 0 Shift-Points ;
Problem:	Given the deed outline below (points 1 to 7), and the field located points (11 to 14) shown together with the associated traverse, rotate the deed to the best two point deed-to-field distance comparison.
Solution:	-36 25 1 11 4 12 5 13 6 14 0 1 -8 ;

Data Description

Command	-36	Computes the angle of rotation between lines of a defined deed figure and the lines of a defined field figure. Adjusts the defined deed outline to best match the field outline, based on a best fit between two points. An angle of rotation is computed between each specified deed line and the corresponding field line. The angle is measured clockwise from the deed line to the field line if the field line lies to the right. If the bearing of the field line lies to the left of the deed line, the angle is measured counter-clockwise. Note: The deed and field points are entered in reverse order in the 18 and -18 commands. You must enter the deed points first in the -36 command. Once the initial results of a -36 command are seen and accepted, the command can be replaced with a -10 command followed by a -18 command. The -36 command can also be edited to remove the best-fitting points, and a different solution can be sought. This may be done several times in an attempt to get a good fit for as many points as possible.
Tolerance	25	Minimum distance between points to be used for comparison.
Deed-Pt Field-Pt	1, 11	Point numbers used to define the deed figure and the field figure.
{[Deed-Pt Field-Pt].. }	4, 12 5, 13 6, 14	Repeating feature of this command. Allows you to enter deed points and field points in order. As many pairs may be entered as necessary to define the figures. Both figures must have the same number of points in their definitions.
End Repeating	0	End the repeating feature section.
Shift-Ponts	1, -8	List of all the deed points that are to be shifted based on the angle of rotation calculated to be the best fit. If you want to define a series of sequential points, enter the first and last points in the series. The last point number of the series must be preceded by a hyphen. All the points between the two values are adjusted. Example: Enter 1, -50 to adjust all the points from 1 through 50, inclusive. The points to be shifted are listed separately from the points for comparison so that all deed corners and curve centers can be rotated, not just those which are directly associated with field points. If necessary, it is also possible to rotate only part of a deed figure.
End Command	;	All commands end with a semi-colon.

Example Command File

$ Example data set for the -36 (-BestFit Deed) Command

$ Use Command -36 to make an initial 
$   trial rotation to generally orient
$   a deed to (1) field located points, 
$   and (2) public agency datum. 


$ define the feature code parameters for plotting
$ cmd   fea   layer        color style thickness
  15.1  dpts  deedpts      1     1      1;
  15.1  apts  agencypts    2     1      1;

$ Set the initial points for deed closure 
$   in Assumed Datum.
  0 1 34950 71750 ;
  1 2 1 -1 62 30 10 85.72 
           9E9 150 
               8E8 48 29 50 150 
                   62.37 0
        -3 37 42 47 108.31
        -4 79 36 21 192.84
        -4  2 52  6  26.71 ;

$ turn on plotting
91 ;

$ activate deedpts feature
  15 dpts ;
  100 DEED - ASSUMED DATUM - DEED MERIDIAN SHOWING CLOSURE;
      7 1 1 2 3.1 4 -8 1 ;

$ Force closure and reset point 1
  96 ;  
  3 1 2 2 1 7 7 8 ;

$ Traverse in Public Agency Datum
  0 
  901 35004.35029 72106.25827
  902 35019.08705 72179.12444
  903 34989.97315 72345.50057
  904 34923.47000 72258.67000
  905 34955.82304 72164.25454 ;

$ Field Ties to Property Corners
  2 11 901 901 902 258 29 30 13.57 ;
 -2 12 903 903 902  31 39 52 50.01
                   170 37 26 15.50 ;
  2 14 904 904 903  53 15  5 18.02 ;

$ Initial Rotation using -36 Command
  -36 25 1 11 4 12 5 13 6 14 0 1 -8 ;

100 DEED - ROTATED TO FIELD POINTS;
    7 1 1 2 3.1 4 -7 1 ;

100 PROPERTY CORNERS FOUND - (FOR PLOT);
    7 1 11 -14 ;

$ activate the agencypts feature
15 apts;
   100 TRAVERSE - PUBLIC AGENCY DATUM;
       7 1 901 -905 901 ;

-91 ;

100 COMPARISONS - PROPERTY CORNERS - DEED TO FIELD;
    6 1 1 11 4 12 5 13 6 14 ;

Help for this command was last updated: 06/28/2000 12:18:42 AM

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Group:Command:

36) Best Fit Solutions-36 or -BestFit Deed

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Command:

36) Best Fit Solutions
-36 or -BestFit Deed