Unit Survey data can be imported into the Terrain Module using menu File - Insert File. The Import Unit Survey Options Dialog allows you to control the format of the incoming data.
The unit survey format reads raw survey shot data. It is very useful for downloading general survey information such as radial surveys or digital data collected with a Laser Gun. The file contains foreshots, backshots and side shots.
The coordinates of each leg of the traverse are calculated based on the azimuth, inclination and distance. When a traverse contains loops, adjustments for closure are not automatic. Foreshots, backshots and multiple shots for the same leg of a traverse are averaged.
The file is in ASCII format with fields delimited by commas.
Each record contains the following fields:
| SURVEY IDENTIFIER | Maximum of 8 characters or numbers uniquely identifying the name of the traverse. The characters should be a valid DOS file name. |
| MEASUREMENT TYPE | One of SR,FS,BS or SD.
SR = Start reference FS = Foreshot BS = Backshot SD = Sideshot |
For Measurement types FS, BS and SD the following fields are included in the record:
| FROM,TO | From, To point indicators. |
| VERTICAL MEASUREMENT |
Azimuth - decimal degrees or D:M:S. |
| VERTICAL MEASUREMENT |
This field is optional for BS type records. Can be any one of the following (see File - Import Feature Set - Options). Inclination Angle - decimal degrees or D:M:S Zenith Angle - decimal degrees or D:M:S Slope % Elevation Elevation difference |
| DISTANCE MEASUREMENT |
Distance can be horizontal or slope and is assumed to match Softree project units. This field is optional for BS type records. |
| HI | Height of instrument |
| HT | Height of target |
| Code | Code identified with the "TO" point. Max 15 characters. |
For Measurement types SR the following fields are included in the record:
| X | Starting Easting (X coordinate) |
| Y | Starting Northing (Y coordinate) |
| Z | Starting Elevation (Z coordinate) |
| CODE | Starting code |
1.Create a *.pol file using a spreadsheet or by transferring data from the Criterion using Laser Technology's download and conversion program. NOTE the file must be in ASCII format. Be sure to use the "SaveAs" menu in your spread sheet software to save the file as a comma (",") delimited ASCII file.
2.From the File menu of TERRAIN select Import.
3.Select Unit Survey format.
4.Choose Options to select the formatting of the fields such as Zenith or Inclination etc.
5.Select *.pol file.
TRAV1,SR,1420,2230,1311,BM1
TRAV1,BS,2,1,180:30:00,.356,120,0,0
TRAV1,FS,1,2,75:30:00,.356,120,0,0,TP2
TRAV1,SD,2,5,340:30:00,.12,67,0,0,SS2-5
TRAV1,SD,2,6,5:30:00,.12,33,0,0,SS2-6
TRAV1,FS,2,3,90:30:00,.256,60,0,0,TP3
TRAV1,FS,3,4,45:30:00,.12,93,0,0,TP4
TRAV1,SD,4,8,25:30:00,.12,85,0,0,SS4-8
TRAV1,SD,4,9,45:30:00,.12,85,0,0,SS4-9
TRAV1,SD,4,10,75:30:00,.12,85,0,0,SS4-10