Using GIS for Utility Mapping and Asset Management
Sanitary Sewer, Storm Sewer, and Water Distribution
City of Mason City
Jessy Willadsen - Mason City GIS Analyst
First Question: Why include utilities into your
GIS?
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View information graphically.
View different layers together.
Store attribute information about features.
Link features to scanned records.
You only have to store the location of
features once.
• 80-90% of data maintained by government
has a spatial component.
Looking at the intersection without utilities in
your GIS
Final Product
Paper Records, Scanning, and
Document linking
Where do you start?
• Went to each department to evaluate what
their GIS needs were.
• Features requested
• Attributes needed
• Potential use of data (use this for
prioritization)
• Planned source to collect the features and
what method will be used to create the
data.
Needs Assessment
• What GIS layers should be created.
• What data will be needed to create these
GIS layers.
• Where is this data located.
• Prioritize what GIS layers will be created
first.
Page out of Needs Assessment
Creating data
• GPS Data collection: Collect features by
GPS and import them into the GIS system.
• Aerial photography interpretation:
Example, you can see manholes in the
aerial photography.
• Measurements from known locations:
Example: Measure water valve from the
center of the road or from property
corners.
Purchase of Survey Grade GPS
• In 2008, the City purchased survey grade
GPS equipment.
• The Leica GPS 1200 unit utilizes the Iowa
Real Time Network.
• Using a cellular modem, the GPS
controller receives correction data from the
internet in real time.
GPS
GPS Components
Handheld GPS
GPS Points
Utility Lines drawn in using GPS data to aid in location
Aerial Photography interpretation
Aerial Photography Interpretation Continued
Measurements
Engineering and Operations & Maintenance
Priorities
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Sanitary Sewer System
Storm Sewer System
Water Distribution System
Road infrastructure
Sanitary Sewer
• Primary Features:
– Mains
– Manholes
• Other features
Mapped:
– Caps and plugs
– Cleanout
– Private mains and
manholes
– Service lines including
wyes and stubs
– Repairs
Sanitary Sewer Evolution
• CAD Files converted to GIS
• Improvement of location in GIS of Mains
and Manholes
• Link to external database
• Link to field books for each service
• Link to CCTV sewer videos.
• Link to sewer profiles.
• Repair Mapping
Sanitary Sewer Future Development / Ideas
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Maintain existing functionality
Complete GPS collection of all manholes
Map service connections
Scan plans and link to GIS.
Sanitary Sewer Common attributes
• Pipe Material
• Pipe Size
• More?
Auto Cad File
Manhole Inspections Database
Sewer CCTV
As-Built Plans
Sanitary Sewer Property Records
Page from Sanitary Sewer Field Book
Sanitary Sewer Profile Sheet
Sanitary Sewer Reference Book
Sanitary Sewer GIS Data
Water Distribution
• Primary Features
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Valves
Hydrants
Mains
Junctions
• Other features Mapped
– Service lines
– Cutoffs and Corporation
– Turning zones and
Flushing routes
– Main breaks
– Wells, Water Towers,
Booster Stations, and
reservoirs
– Reducers and Hydrastoppers
Water Distribution Evolution
• No Usable CAD files to import
• GPS collected valves and hydrants
• Draw mains using water book as
reference.
• Used database as reference also which
contained measurements from the center
of the road and sidewalk.
Water Service Property Card
Water Utility Database
Water Service Database Record
Water Distribution Features
• Link to external database for valves and
hydrants
• Link to external database for service
points
Water Distribution Typical Attributes
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Pipe Material
Pipe Diameter
Valve Type (Main or Hydrant)
Cutoff Address
Water Distribution Future
Development/Ideas
• Maintain existing advancements.
• Migrate the microsoft access database to
an enterprise database such as postgre.
• Scan service records for each water
service and link to GIS.
• Continue GPS collecting Valves, Hydrants,
and Water Cutoffs.
• Link service data to cutoffs.
Water Book
Water Book Page
Water Book Closer Look
Water Distribution GIS
Water Distribution GIS Continued
Storm Sewer
• Primary Features
– Main
– Intake
– Manhole
– Discharge
Storm Sewer
• Other features Mapped
– Abandoned pipe
– Districts
– Lift Station
– Private mains, intakes
– Services
Storm Sewer Auto Cad File
Storm Sewer Features in the Field
Storm Sewer Features in the Field
Storm Sewer Features in the Field
Storm Sewer Features in the Field
Storm Sewer Features in the Imagery
Storm Sewer Features GPS collection
Storm Sewer Features in the GIS
Storm Sewer Profile Sheet
Aerial no Mason City Utilities
Aerial with Mason City Utilities
The End
• Questions
• Comments