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Provided that the line segments have ObjectIDs numbered in the same order as the points and all points have sequential ObjectIDs, you can add a field called EndOID to your lines and calculate it to be equal to ObjectID + 1. Also add two dateTime fields called Start_Time and End_Time and a double field called Duration to your lines. Do a standard join of ...


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You can also write your ssf file to a shapefile directly in TerraSync. This shapefile can then be transferred from the device to your PC. The steps for doing this are as follows: When finished collecting data in TerraSync close out the data file. Open the file manager in TerraSync. (Data>File Manager) Select the data file you want to write to a .shp Tap ...


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Short answer, use the DEM. Handheld GPS units of the type you mention (consumer grade), can potentially use two different methods to figure elevation - the calculated GPS position or an internal barometric altimeter. Because of the way GPS works (explained at the page mkennedy originally linked to in a comment, and elsewhere), without high-grade, corrected ...


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It could be that depending on the software that you use to do the sum, if one vehicle has no data, then the final sum is invalid. As a simple workaround, you can set value to 0 (zero) for those cars/trucks without data and then do the sum. This workaround is not helpful if you want to know which car did not travel on a specific date.



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