Trace Solver

The Trace Solver provides tools for tracing sewer, storm, and water lines. It also offers a quick and easy way to select groups of Pipes to create Subsets or Work Orders.

The Lucity Trace Solver does not rely on the trace solvers built into ArcGIS; therefore, it works without an ArcInfo license and does not require an agency to develop an ArcGIS geometric network.

Click on the Trace Solver tool . The following dialog appears:
Select a Trace from the drop-down box:
- Upstream/Downstream Trace – Selects all lines upstream or downstream of the line the user selects (including the line the user clicks on).
- Upstream/Downstream Distance Trace – Prompts the user to specify a distance and traces the line upstream or downstream until that distance is met or exceeded. The line the user clicks on is included in the distance calculation. It does not matter at what point users click on the initiating line; the system will uses the full line length in the calculation.
- Upstream/Downstream Segment Trace – Prompts the user to identify a number of segments to trace, then traces the line upstream or downstream for the specified number of segments. The line the user clicks on is included in the segment count.
Click Trace. The mouse cursor changes to crosshairs.
Click a point along the Sewer/Storm Pipe feature class at which to begin the trace.
When the process is finished, a prompt appears. Click OK. The map zooms to the extent of the selected Sewer/Storm Pipes.

Users can continue to use the tool to perform additional traces by clicking on a point along the Sewer/Storm Pipe feature class.

Click on the Trace Solver tool . The following dialog appears:
Select Water Isolation Valve Trace from the drop-down list.
Several options are available:
- Water Line Trace Options: Check the Statuses that indicate a valve cannot be closed. If no statuses are checked, the tool assumes that all isolation valves can be turned off.
- Query the Lucity database rather than the valve feature class for the valve's isolation flag and operational status.: Check this option if your agency prefers to keep this information only in Lucity, rather than storing it in the feature class.
- Subset Option: Check to create a subset from the resulting selection. When this option is checked, the field to the right is enabled to allow the user to enter a Subset Name.
- Hydrant Options:
  - Do not select hydrants - Avoids selecting Hydrants.
  - Select hydrants using a pipe # assigned to hydrant - Checks the Pipes selected in the trace against the Hydrant records in Lucity to determine whether any Hydrants are attached to those Pipes.
  - Select hydrants within a specified distance from affected pipes - Selects Hydrants within a specified distance of the selected Pipes.
    Note: Selecting by Pipe Number assigned to the Hydrant is the most accurate method of selecting hydrants affected by a shutoff.
Click Trace. The mouse cursor changes to crosshairs.
Click a point along the Sewer/Storm Pipe feature class at which to begin the trace.
When the trace is complete, a prompt appears. Click OK. The map zooms to the extent of the selected Water assets.

Users can continue to use the tool to perform additional traces by clicking on a point along the Water Pipe feature class.

Sewer/Storm Upstream/Downstream Trace	Selects all lines upstream or downstream of the line the user selects (including the line the user clicks on).
Sewer/Storm Upstream/Downstream Distance Trace	Prompts the user to specify a distance and traces the line upstream or downstream until that distance is met or exceeded. The line the user clicks on is included in the distance calculation. It does not matter at what point users click on the initiating line; the system will uses the full line length in the calculation.
Sewer/Storm Upstream/Downstream Segment Trace	Prompts the user to identify a number of segments to trace, then traces the line upstream or downstream for the specified number of segments. The line the user clicks on is included in the segment count.
Water Isolation Valve Trace	Identifies the water-system shutoff points closest to a specific location. The tool selects all Water Pipes upstream and downstream until it reaches a Water Isolation Valve. It selects the Isolation Valve and has the ability to select any related Hydrants.


Step 1: Choose a trace type		Select the type of Trace to perform.
Step 2: Selection Options		Determine how the Trace tool should react when it is run while features are selected. If the option is set to Clear Selection, the tool will deselect any previously selected features. If it is set to Add to Current Selection, the tool adds pipes from the trace to the current selection.
Step 3: Water Line Trace Options		These options only appear if the Water Isolation Valve Trace is selected in Step 1. This trace identifies which valves can be used to shut water off based on whether each valve is classified as an Isolation Valve and whether its Status is considered closeable. Use the grid to the right to identify any Status that is not considered closeable.
	Query the Lucity Database...		Mark this option to indicate that the Isolation Valve and Status information is stored in Lucity rather than the geodatabase.
Step 4: Subset Option		Mark this box to create subsets of the selected Water Pipes, Valves and Hydrants. Enter a Name for the subsets in the provided field.
Step 5: Hydrant Options		Choose whether the tool should select Hydrants, and if so, how. If selecting the third option, specify the distance in the provided field. The tool will also select all Hydrants within that distance of a selected pipe.