Building a Network Solution
To use the Context Manager to perform a network alignment, select Alignment > Network Alignments > USMN>Uncertainty Context Manager .
This unimposing dialog provides the foundation within which the un- certainty context for your job file will be built. It offers a tree structure for visualizing the dependencies in that process.
Use the Actions option to add a new network.
Doing so will trigger the following prompts:
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Select network Working Frame. This provides an option to choose the base frame upon which the uncertainty computation is built.
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Select instruments in the network. Select all the instruments that you wish to include in the solution.
You will then get an opportunity to exclude points measured by the selected instruments within the Network Build Settings dialog. Only include points you wish to use with the network solution (the same option is also available through USMN).
The expectation is that points from different groups with the same names included in this network represent separate observations on the same target and will be aligned as part of the computation.
Be sure to exclude points with the same name as the alignment points that do not represent the network points. If SA detects this condition it will mark the “Possible Collision” in (red).
Points measured by only a single instrument station are marked in blue (blue). These points are identified to help you rename them if they are part of the network solution. Addition points measured by only a single instrument station can also be included for uncertainty analysis if desired but will not impact the network solution.
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Select nominal point Groups in the network. Much like USMN with Point Groups this option allows you to select a reference point group.
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Select Scale Bars. Scale bars can also be included in the network.
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The resulting network name that is added within the Uncertainty Context Manager. The default name is: “Uncertainty Context Network” which can be renamed as desired.