Using GIS for Utility Mapping and Asset Management Sanitary Sewer, Storm Sewer, and Water...

Using GIS for Utility Mapping and Asset ManagementSanitary Sewer, Storm Sewer, and Water Distribution

City of Mason City

Jessy Willadsen - Mason City GIS Analyst

First Question: Why include utilities into your GIS?

• 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, andDocument 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

• 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

• 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– 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 Hydra-stoppers

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

• 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

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