TerraMatch User Guide

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Navigation: TerraMatch User Guide > Tool Reference > Working with Tie Lines > Tools pulldown menu

Convert time stamps

Convert time stamps command can be used to convert the format of time stamps. Supported conversions are:

INPUT FORMAT	CONVERTED FORMAT
GPS seconds-of-week	GPS standard time
GPS seconds-of-week	GPS time
GPS standard time	GPS seconds-of-week
GPS standard time	GPS time
GPS time	GPS seconds-of-week
GPS time	GPS standard time
GPS seconds-of-day	GPS seconds-of-week
	GPS standard time
	GPS time
Unix time	GPS seconds-of-week
	GPS standard time
	GPS time
UTC seconds-of-day	GPS seconds-of-week
	GPS standard time
	GPS time
UTC seconds-of-week	GPS seconds-of-week
	GPS standard time
	GPS time

The conversion may be necessary if data was processed earlier using one time stamp format and then, the time stamp format of the trajectories has been changed for some reason. It is essential that time stamps of tie lines are the same as for trajectories and point cloud data.

To convert time stamps:

1. Select Convert time stamps command from the Tools pulldown menu.

This opens the Convert Tie Line Time dialog:

convert_tie_line_time

3. Define settings and click OK.

This converts the tie line time stamps to the new format. Save the tie line file in order to make the modification permanent.

SETTING	EFFECT
Method	Defines the computation method of modifying time stamps: •Source and target system - conversion from one time format to another. •Multiply and add constant - constant value by which time stamps are multiplied or that is added to current time stamps.
Current values	Original time stamp format of the trajectory positions. This is only active if Method is set to Source and target system.
Convert to	Target time stamp format. This is only active if Method is set to Source and target system.
Survey date	Date when the data was captured for which the tie lines have been derived. The format is day/month/year (dd/mm/yyyy). This is only active for the conversion from GPS seconds-of-week or UTC seconds-of-day/week to GPS standard time or GPS time.
Multiply by	Factor by which current time stamps are multiplied. This is only active if Method is set to Multiply and add constant.
Add	Value to add to GPS time stamps when converted from UTC seconds-of-day time stamps. Refers to the leap-seconds that by which GPS time is ahead of UTC time. This is only active for the conversion from UTC seconds-of-day to any GPS time format. Value to add to current time stamps if Method is set to Multiply and add constant.
Deduce line numbers	If on, line numbers for the tie lines are deduced from the trajectories loaded in TerraScan. This is only successful, if the time stamps correspond to each other in both, tie lines and trajectories.

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TerraMatch User Guide