Creating and Adjusting Traverses

Traverse 3 - This traverse is also mathematically closed but geometrically open. It starts and ends on unknown points that backsight and foresight stations included in the larger closed-loop traverse.

About this tutorial
About this tutorial
In this tutorial, you will create and adjust three traverses that were surveyed in the field as part of the same project: Traverse 1 - This is a closed-loop traverse that starts and ends on the same point.
Creating aal
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Overview of traverse adjustments
Note: If you need additional help at any time you are using the software, press F1 to display the online help.
Creating and Adjusting Traverses Tutorial
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Step 1. Open the project
Angular and distance misclosure can be computed from a traverse in which both the start station and end station are on known points. Only distance misclosure can be computed from a traverse in which either the start station or end station is not on a known point. Additional notes: A traverse can end on a known point that is not occupied (it is only observed from the previous intermediate station) when any of the station setup types is used as the start station. However, in this case, an angular misclosure cannot be computed. A traverse can start on an unknown point with a backsight to a known point, and end on an unknown point with a foresight to a known point (as demonstrated when you create the second open traverse later in this tutorial).
Traverse 2 - This traverse is mathematically closed, but it is geometrically open (not a closed-loop). It starts and ends on separate stations that were included in the larger closed-loop traverse.
Traverse station types
A traverse is defined by the following station types: Start and end stations - These station types fall into two categories: A station setup (such as a Station Setup or Station Setup Plus) has been performed over a known point or a station setup (such as a standard/Helmert resection) has been performed over an unknown point. In either case, the position of the station is known without any help from other stations in the traverse. The orientation of the station is also known independent of the traverse. Such stations serve as fixed input into the traverse adjustment and are not changed by the adjustment. A station setup (such as Station Setup or Station Setup Plus) has been performed over a point for which the position was determined from the first or last intermediate station. The station backsights or foresights a point with a known position or azimuth. The station setup cannot be computed independently from the traverse. This station will be adjusted by the traverse adjustment. Note that when both the start and end stations are of this type, backsight and foresight points are the only known points, and every station in the traverse will be adjusted. This is the weakest type of traverse because it has the least amount of fixed input information. Intermediate stations - These are all of the stations located between the start station and end station. In all configurations, the points these stations are set up on will be adjusted. The first intermediate station is adjacent to the start station and the last intermediate station is the adjacent to the end station. In some cases, the endpoint station will also be adjusted.
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Creating and Adjusting Traverses Tutorial
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Overview of traverse adjustments
Trimble Business Center allows you to import, edit, and adjust traverses in the office. A traverse is a surveying method used to establish control networks that involves placing survey stations along a line or path of travel, and then using the previously surveyed points as a base for observing the next point.

Traverse dependencies
When creating or editing a traverse, an intermediate station in one traverse can serve as the first or last station in a second traverse (as demonstrated when you create the first open traverse later in this tutorial). This makes the second traverse dependent on the first one. This is because the adjustment of the first traverse puts traverse-adjusted coordinates on all the intermediate station points, qualifying any of the them as a start and end station for a second traverse. When traverses are automatically adjusted, the software recognizes these dependencies and adjusts the traverses in the proper sequence. If you are adjusting traverses manually, you need to keep dependencies in mind and adjust traverses in the proper sequence.