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Group: |
18) Translation |
Methodology | |
| Command: | -18 |
| Alpha Alias: | Translate |
| Description: | Translates deed points to field points using rotation factor without applying distance factor |
| Data Format: | -18 Field-Point Deed-Points ; |
| Problem: | Given field points 17, 18, 19, 20, 21 and 22 and deed points 101, 102, 103, 104, 105 and 106; and the determination that deed points 101 and 105 correspond to field points 17 and 21. Rotate the deed, using the angle of rotation between 101-105 and 17-21; equate the coordinates of point 101 to point 17 and re-coordinate points 102 through 106 using new bearings and distances from point 101 without applying distance scale factors. (See example data file for complete solution.) |
| Solution: | $ define rotation -10 101 105 17 21 ; $ perform translation -18 17 101 102 103 104 105 106 ; |
Data Description
| Command | -18 | Translates deed points to field points using only the angle of rotation factor as computed in the 10 or -10 command.
The combined use of commands 10 or -10 and -18 results in the translation or rotation of the axis of the deed or plat figure. Note: The field and deed points are entered in the reverse order of the 10 and -10 commands. You must enter the field point first in the -18 command. |
| Field-Point | 17 | Point number of the field point that is to be used as the starting coordinate, or point of rotation. |
| Deed-Points | 101
102 103 104 105 106 | Previously computed deed point numbers to be translated to the field points.
Enter the first point to be equated with the specified field point. Then enter, in order, the deed points which define the deed lines. Each defined deed line is altered by the angle of rotation from the previously executed 10 or -10 command, and the coordinates for each deed point are recomputed. |
| End Command | ; | All commands end with a semi-colon. |
Example Command File
$ Example data set for the -18
$ (TRANSLATE) command.
$ Set the initial points.
0 17 1620.0 508.3
18 2310.0 1225.0
19 1620.0 1825.0
20 1770.0 2691.7
21 1000.0 1783.3
22 1060.0 983.3
101 1733.5 3217.0
102 2333.5 3967.0
103 1583.5 4579.5
104 1808.5 5579.5
105 908.5 4592.0
106 1028.5 3592.0 ;
$ Calculate the rotation and distance factors
$ using -10 command.
-10 101 105 17 21 ;
$ Translate the deed points using the -18 command.
-18 17 101 102 103 104 105 106 ;
$ reset angle rotation and distance factors
$ to default values
10 0 0 0 1 ;
$ define the feature code parameters
$ cmd fea layer color style thickness
15.1 fpts fieldpts 1 1 1;
15.1 dpts deedpts 3 1 1;
15.1 chk check 2 1 1;
$ turn plotting on
91 ;
$ activate the fieldpts feature and inverse the boundary
15 fpts;
100 Field points closure ;
7 1 17 18 19 20 21 22 17 ;
$ activate the deedpts feature and inverse the boundary
15 dpts;
100 Transformed deed closure ;
7 2 101 102 103 104 105 106 101 ;
$ activate the check feature and inverse the boundary
15 chk;
100 Comparison of field to translated deed line;
6 1 17 21 101 105 ;