(The Input / Output module is required for this procedure.)
This procedure is used to process a field survey from electronic data recorder through to objects in the data base. You may obtain additional help by clicking the underlined topics. If you do select an underlined topic, you may return to this procedure by clicking the Back key.
- Ensure that there is a data base open.
Refer to the procedures for creating or opening a data base. - Ensure that the Earth Constants are correctly set as these
govern the corrections applied to the measured distances.
Refer to the procedure for Configuring Earth Constants. - Ensure that there is an existing code table with the
feature codes and attributes correctly defined to match the feature
codes used in the field survey.
Refer to the procedure for editing a code table. - Select the Field Transfer task.
- Select the Settings/Instrument command and use the Instrument dialog box to ensure that the theodolite vertical circle type is correctly set to match the theodolite used.
- Select the Settings/Code Definition command and use the Code Definition dialog box to ensure that the defined feature code structure matches that used in the field survey.
- If desired, select the Settings/Tolerances command and use the Tolerances dialog box to set the tolerances used by the system to generate warnings in the reduction process if observations are outside the tolerance set.
- Connect the data recorder to the port on your computer.
- Select the Input/Data Recorder command and use the Data Recorder Input dialog
box to:
Select the data recorder device to be used from the Installed Device List.
- If the device has not been installed, first install the device via the Install button. Refer to the Install Data Recorder Devices dialog box.
- If they are not the same, you can change them via the Configure button. Refer to the Communications Settings dialog box.
- It is recommended that you select the Default button in this dialog box to use the default settings and configure the data recorder to match the defaults.
Select the OK button to place the system in a ready state waiting for the data to be transferred from the data recorder. - Initiate the transfer of the data by using the appropriate
functions on the data recorder.
If the communications settings and cabling between the data recorder and computer are correct, the data is downloaded to the RAW file on the hard disk. (Tip: Refer to the appropriate data recorder topic in the Help system by using the Search button and doing a key word search on data recorders.) - Select the Resolve/Create Field File command and use the Create Field File dialog
box to:
Select the source data folder and the RAW file to be used in creating or appending to a FIELD file.
Select the destination data folder and the FIELD file to which the observations of the RAW file will be transferred in a standard and more readable format.
Select the OK button to create the FIELD file. - Any errors or warnings encountered in the process are written to the ERROR file. View or print any such errors using the Field Transfer/Errors menu.
- If there were errors encountered in the process of transferring the observations to the field file, use the Resolve/Edit Raw File command to rectify the errors and repeat from step 11 until no errors are encountered.
- If there are control observations in the survey that you
wish to adjust before reducing the field file, use the Resolve/Least Squares
Adjustment command to create a Control file
containing the observations between control points, edit the control
file, carry out the desired adjustment, and transfer the adjusted
co-ordinates or elevations to the currently open data base. Refer to
the procedure for Adjusting
Control Observations for further information.
Alternatively you may wish to use the Resolve/Traverses command to create a Traverse file containing traverse observations, edit the traverse file, carry out the desired traverse adjustment, and transfer the adjusted co-ordinates or elevations to the currently open data base. Refer to the procedure for Adjusting a Traverse for further information.
When the Field file is reduced, any adjusted co-ordinates or elevations previously transferred to the data base will be used as the control, ensuring that the reduction of the field file reflects the adjusted control. - Use the Resolve/Reduce
Field File command to:
Select the folder and field file to be reduced.
Select the code table to be used in defining the object attributes in the reduction process.
Select which Corrections are to be applied.
Select which Reduction Options are to be used.
Select OK to validate and reduce the field file and create the appropriate objects in the data base. The reduction will only proceed if no errors are encountered.
If any of the control points or observed points in the field file already exists in the data base, and if the point identifiers are configured as unique, the co-ordinates and elevations of these points in the data base are used in preference to any co-ordinates in or computed from the FIELD file. That is, existing points in the data base take precedence and cannot be overwritten by the reduction process. If the point identifiers are configured as non unique, then duplicate points with the same identifier can be added to the data base in the reduction process. - Any errors or warnings encountered in the process of validating the field file are written to the ERROR file. View or print any such errors using the Field Transfer/Errors menu.
- If there were errors encountered in the process of validating the field file, use the Resolve/Edit Field File command to rectify the errors and then repeat step 15 until the objects are successfully created.