effective esri geometric network tracing with fme
DESCRIPTION
A look into the use of FME technology to mimic traces on Esri's geometric networks with efficiency and transparency, just by using the spatial coincidence of features. See more presentations from the FME User Conference 2014 at: www.safe.com/fmeucTRANSCRIPT
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Effective ESRI Geometric Network Tracing with FME Erika Jacobs, Avista Utilities
Effective ESRI Geometric Network Tracing with FME
Established in 1889
355,000 Electric Customers
21,700 miles electric lines
314,000 Gas Customers
7,670 miles gas pipe
8 Hydro Facilities
GIS users since 1992
FME users since 2004
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Avista Utilities Overview
Vancouver, BC
Effective ESRI Geometric Network Tracing with FME
Problem ESRI Networks can be
Slow to trace Missing flow information
Inefficient for large-scale analysis Limited in their properties
Solution FME’s Network Topology Calculator
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Effective ESRI Geometric Network Tracing with FME
Example Find all customers downstream
of gas fittings that must be replaced
and notify them of impending work.
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Effective ESRI Geometric Network Tracing with FME
Be selective
! In this example ! Service pipe only ! Selected work area
polygons ! Filter by material and
installation date
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Effective ESRI Geometric Network Tracing with FME
! Limit the attributes
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Effective ESRI Geometric Network Tracing with FME
! Create Isolation Points
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Effective ESRI Geometric Network Tracing with FME
! Prep the data ! No complex edges ! No self-intersects ! Everything coincident
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Effective ESRI Geometric Network Tracing with FME
! Create the Network
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Effective ESRI Geometric Network Tracing with FME
! Assign the Network_IDs to the tees using a Point on Line Overlayer
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Effective ESRI Geometric Network Tracing with FME
! Find Affected Downstream Meters
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Effective ESRI Geometric Network Tracing with FME
Note the .5 ft gap
Pipe removed that overlapped with the .5ft buffered tee
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Effective ESRI Geometric Network Tracing with FME
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Effective ESRI Geometric Network Tracing with FME
Other Examples
! Find Number of Meters served by each Gas Pressure Zone
! Find Emergency Shut-off Islands
! Network Health Checks
! Isolated Steel Pipe
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Effective ESRI Geometric Network Tracing with FME
Tips and Tricks
! For large datasets, run the Chopper and NetworkTopologyCalculator in separate workbenches
! Use original features and a FeatureMerger to replace the chopped segments and reduce feature count for additional operations
! Aggregator (by Network_ID) and ListSearcher to find related features once all the overlayers are done
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Thank You!
! Questions? ! Suggested Improvements?
! For more information: ! Erika Jacobs ! Avista Utilities
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