Updating Raw Data

Warning! This is NOT something you are likely to do very often. It may change the raw data you entered or imported and there is no undo.

TPC recommends that you try this operation on a trial survey first before proceeding with your actual survey data.

About Raw Data

TPC stores the raw data (distance, horizontal angle or direction, vertical angle or percent, instrument height, target height, etc) used to compute each point in the Traverse View. You can display this raw data any time by choosing View | Display Raw Data. When you Recompute a traverse or Undo Adjustments, TPC uses the raw data to recompute the position of each point.

When you adjust a traverse, TPC first checks to see if each point being adjusted contains raw data. If raw data is missing, TPC displays the point(s) that does not contain raw data and aborts the adjustment. This is a safeguard that insures that the adjustments can be undone if requested.

If you import coordinates and then adjust them, TPC will abort the adjustment because imported coordinates do not contain raw data. In this case, you can recreate the equivalent raw data using the Update Raw command in the Traverse View and then do the adjustment.

When TPC updates raw data, it uses the current Traverse View format to decide which raw data to create using the following rules:

• If slope distances are displayed, TPC creates a raw slope distance and vertical angle (default) or percent slope.
  
• If horizontal distance is displayed, TPC creates a raw horizontal distance and vertical distance.
  
• If bearings or azimuths are displayed and field angle or deflections angles are not, TPC creates a raw bearing or azimuth.
  
• If field or deflection angles are displayed, TPC creates a raw field or deflection angle (even if bearings or azimuths are also displayed).
  
• Instrument height and target heights are retained if present, but are not computed if not present.
  
• Any existing raw data is retained, but missing raw data is filled in. The Update Raw Data dialog does contain a toggle to overwrite existing raw data.

Warning! You should update raw data ONLY if you are familiar with this feature. Once raw data has been updated, it can not be undone and becomes part of the survey.

Related Topics

Traverse View
Entering Traverse Data
Displaying Raw Data
Recomputing a Traverse

Editions

Personal, Premium, Professional