Traversing

(This functionality is available with the Input / Output module)

LISCAD and Traversing

LISCAD reduction has been designed so that it requires a minimum of operation codes to be input by the user. No specific operation codes are required for foresight observations, for check shots etc. As a result, there are imposed certain restrictions on the order of collection of data.

These same concepts apply to traversing. In fact, if not using rounds of angles, no extra operation codes are required, to ensure the smooth extraction into the traverse editor.

Although multiple setups may be recorded at the same station, NOTE that the LISCAD Traverse extraction always extracts ONLY the first setup recorded at any particular point. Other setups at the point will be ignored by the Traverse extraction, but will of course be used in normal Field File Reduction.

Hence, if performing a survey that you wish to extract to the Traverse Editor, always use the following procedure.

1. Ensure that the setups are in order around the traverse.
2. The first setup at each traverse station must be followed immediately by the observations that you want extracted to the traverse editor.
   • For single one face traverse observations, there may be a backsight observation depending on the setup operation code used, and there will always need to be a foresight observation to the next traverse station. OR
   • For Multiple dual face observations, (supported by LISCAD with Leica instruments), use Op Code 3 immediately after the setup. Refer to the Leica/WILD Operation Codes for instructions on using this op code. It is critical that you follow these instructions exactly.
   NOTE: If the station setup is on datum or you do not know the coordinates of your backsight, you MUST enter the backsight point identifier as zero.
3. Use any subsequent setups at the same traverse station for detail observations. Such subsequent setups at the same point are not used in the traverse extraction.

Traversing with the TPS-100 Series instruments

When downloading data from a TPS-100 Series Instrument using LISCAD's TPS100.FRT file, more than one Setup record for the same setup may be created in the raw data file. This has been specifically designed to cater for user flexibility in recording with these instruments.

If the data is a result of a detail survey using the on board firmware to record station co-ordinates and detail observations, any redundant setups observations will be ignored by the LISCAD reduction process. However if you wish to carry out a Survey with the ability to extract and reduce a traverse independently, the following procedures must be followed:

1. Using TCTOOLS, upload the CODELIST TPS100T.CDE (See Note 1)
2. To conform with the established LISCAD recording and reduction standards, the survey information should be collected and recorded with the TPS-100 in either manner A or B.
   • A. If NO rounds are being recorded at the station for extraction into a traverse.
     
     1. Setup the instrument on the traverse station.
     2. Use CODE 'Setup' to enter and record the Station Identifier, Instrument Height and Backsight Identifier.
     3. Enter the target height of the backsight. (To save time, it is not necessary to re-enter Backsight Identifier as the first observation taken after a CODE 'Setup' is always taken by LISCAD as the backsight observation).
     4. Sight to the backsight. Use the MENU/SET HZ to set the backsight azimuth. We recommend setting zero.
     5. Record the Observation to the backsight.
     6. Enter the Point Identifier and target height of the foresight.
     7. Record the Observation to the foresight. (The traverse recording is now complete for this station)
     8. If you wish to also observe some detail points, do this now. If co-ordinates are to be entered, or if you need to re orientate, use SET STATION before observing detail points. (See Note 2)
     9. Observe detail points. Ensure your target height is correct.
     10. Repeat steps 1 to 9 for each traverse station.
     11. Use LISCAD to down-load the data from the instrument. Ensure the format file 'TPS100.FRT' is in the User folder which is used for the down-loading process.
   • B. If rounds are being recorded at a station for extraction into a traverse.
     1. Setup the instrument on the traverse station.
     2. Use CODE 'Setup' to enter and record the Station Identifier, Instrument Height and Backsight Identifier.
     3. Use CODE 'Angle Rd' to enter and record the number of arcs to observe. (This is Operation Code 3. Refer to Leica/WILD Operation Codes).
     4. Enter the target height of the backsight. (To save time, it is not necessary to re-enter Backsight Identifier as the first observation taken after a CODE 'Setup' is always taken by LISCAD as the backsight observation).
     5. Sight to the backsight. Use the MENU/SET HZ to set the backsight azimuth. We recommend setting zero.
     6. Record the Observation to the backsight.
     7. Enter the Point Identifier and target height of the foresight.
     8. Record the Observation to the foresight. (This completes the first arc)
     9. Change face and record observations to the foresight and backsight. You MUST NOT enter target heights for these observations, and it is not necessary to enter the point identifiers. The system assumes you set the target to the same heights as entered in the first arc.
     10. If you entered more than 2 arcs in step 3, Repeat steps 6, 8 and 9 for each additional pair of arcs. You MUST NOT enter target heights for these observations, and it is not necessary to enter the point identifiers.
         The traverse recording is now complete for this station.
     11. If you wish to also observe some detail points, do this now. If co-ordinates are to be entered, or if you need to re orientate, use SET STATION before observing detail points. If you do not use SET STATION, ENSURE that your orientation is zero to the backsight. (See Note 2).
     12. Observe detail points. Ensure your target height is correct.
     13. Repeat Steps 1 to 12 at each traverse station.
     14. Use LISCAD to down-load the data from the instrument. Ensure the format file 'TPS100.FRT' is in the User folder which is used for the down-loading process.

NOTES:

NOTE 1. CODELIST

Codelist TPS100T.CDE maybe created from the standard codelist TPS100.CDE issued with LISCAD with the following code added.

Code	Info1	Info2	Info3	Info4	Info5
Setup	? StatId	? HI	0.0	? BS_Id	1

Where:

• StatId is the Station Point Identifier
• HI is the Instrument Height
• BS_Id is the Backsight Point Identifier.
• Info5 is used to specify the LISCAD Leica operation code.

This codelist line allows you to use the LISCAD Leica Operation Code 1 for a setup on the TPS-100.

NOTE 2. SET STATION may not be required.

This step is not required if you are not recording station co-ordinates, if your orientation is correct, and if you are going to provide the control co-ordinates from within the LISCAD database or during the traverse reduction process.

If you are recording rounds, and do not use SET STATION before doing the detail observations, ensure that the instrument is orientated as zero to the backsight. (Depending on the number of rounds read, this may require a change of face).

Traversing with the TPS-300, 400, 700 & 800 Instruments

When downloading data from one of the above Instruments using the FRT files supplied with LISCAD, more than one Setup record for the same setup may be created in the raw data file. This has been specifically designed to cater for user flexibility in recording with these instruments. Note: You must ensure that you are using the correct FRT file when downloading. There is a format installed with the system, Tps.frt that is to be used when using one of the above instruments. This format file is located in your User folder.

If the data is a result of a detail survey using the on board firmware to record station co-ordinates and detail observations, any redundant setups observations will be ignored by the LISCAD reduction process. However if you wish to carry out a Survey with the ability to extract and reduce a traverse independently, the following procedures must be followed:

1. Using "Leica Survey Office", upload the appropriate codelist (See Note 1)
2. To conform with the established LISCAD recording and reduction standards, the survey information should be collected and recorded with the TPS-300 in either manner A or B.
   • A. If NO rounds are being recorded at the station for extraction into a traverse.
     1. Setup the instrument on the traverse station.
     2. Use CODE 'Setup' to enter and record the Station Identifier, Instrument Height and Backsight Identifier.
     3. Enter the target height of the backsight. (To save time, it is not necessary to re-enter Backsight Identifier as the first observation taken after a CODE 'Setup' is always taken by LISCAD as the backsight observation).
     4. Sight to the backsight. Use the MENU/SET HZ to set the backsight azimuth. We recommend setting zero.
     5. Record the Observation to the backsight.
     6. Enter the Point Identifier and target height of the foresight.
     7. Record the Observation to the foresight. (The traverse recording is now complete for this station)
     8. If you wish to also observe some detail points, do this now. If co-ordinates are to be entered, or if you need to re orientate, use SET STATION before observing detail points. (See Note 2)
     9. Observe detail points. Ensure your target height is correct.
     10. Repeat steps 1 to 9 for each traverse station.
     11. Use LISCAD to down-load the data from the instrument. Ensure the format file 'Tps.frt' is in the User folder which is used for the down-loading process.
   • B. If rounds are being recorded at a station for extraction into a traverse.
     1. Setup the instrument on the traverse station.
     2. Use CODE 'Setup' to enter and record the Station Identifier, Instrument Height and Backsight Identifier.
     3. Use CODE 'Angle Rd' to enter and record the number of arcs to observe. (This is Operation Code 3. Refer to Leica/WILD Operation Codes).
     4. Enter the target height of the backsight. (To save time, it is not necessary to re-enter Backsight Identifier as the first observation taken after a CODE 'Setup' is always taken by LISCAD as the backsight observation).
     5. Sight to the backsight. Use the MENU/SET HZ to set the backsight azimuth. We recommend setting zero.
     6. Record the Observation to the backsight.
     7. Enter the Point Identifier and target height of the foresight.
     8. Record the Observation to the foresight. (This completes the first arc)
     9. Change face and record observations to the foresight and backsight. You MUST NOT enter target heights for these observations, and it is not necessary to enter the point identifiers. The system assumes you set the target to the same heights as entered in the first arc.
     10. If you entered more than 2 arcs in step 3, Repeat steps 6, 8 and 9 for each additional pair of arcs. You MUST NOT enter target heights for these observations, and it is not necessary to enter the point identifiers.
     11. The traverse recording is now complete for this station.
     12. If you wish to also observe some detail points, do this now. If co-ordinates are to be entered, or if you need to re orientate, use SET STATION before observing detail points. If you do not use SET STATION, ENSURE that your orientation is zero to the backsight. (See Note 2).
     13. Observe detail points. Ensure your target height is correct.
     14. Repeat Steps 1 to 12 at each traverse station.
     15. Use LISCAD to down-load the data from the instrument. Ensure the format file 'Tps.frt' is in the User folder which is used for the down-loading process.

NOTES:

NOTE 1. CODELIST

If you would like to create your own codelist, the standard codelist TPS300oc.CRF issued with LISCAD can be used as a templates with the following code added.

Code	Info1	Info2	Info3	Info4	Info5
Setup	? StatId	? HI	0.0	? BS_Id	1

Where:

• StatId is the Station Point Identifier
• HI is the Instrument Height
• BS_Id is the Backsight Point Identifier.
• Info5 is used to specify the LISCAD Leica operation code.

This codelist line allows you to use the LISCAD Leica Operation Code 1 for a setup on the TPS-300, 400, 700 & 800 Instruments

NOTE 2. SET STATION may not be required.

This step is not required if you are not recording station co-ordinates, if your orientation is correct, and if you are going to provide the control co-ordinates from within the LISCAD database or during the traverse reduction process.

If you are recording rounds, and do not use SET STATION before doing the detail observations, ensure that the instrument is orientated as zero to the backsight. (Depending on the number of rounds read, this may require a change of face).