How does a community maintain a stormwater infrastructure database in ArcGIS 9.3 using the ESRI Local Government

Data Model?

2013 Ohio GIS ConferenceSeptember 12, 2013 @ 1:00 pm | Columbus Marriott Northwest | Dublin, Ohio

Adam Pooler, GISPSenior GIS Analyst

Stantec

Troy SovaGIS Analyst

Stantec

Outline

• Project Area• Multi-Step Process – Data Collection• Integration into Data Model• Geometric Network and QA/QC• Conclusion• Questions

City of Springdale (yellow outline)

PROJECT AREA (red outline)

Multiple Phases

• Phase 1 – Pre ESRI Data Model – Data Collection

• Phase 2– Data Collection – ESRI Data Model

• Phase 3 – Data Collection– QA/QC– Geometric Network

Stormwater 9.3 File Geodatabase

Local Gov. Data Model

Multi-Step Process• Step 1– Scan Paper As-Built Drawings into digital TIF format using

a Large Format Plotter/Scanner

• Step 2a– Geo-Reference TIF

files using Imagery and Street Centerlines within ArcMap’s Georeferencing Toolbar

• Step 2b– Georeference TIF Files multiple times if drawing sheets have

more than one plan layout.

• Step 3– Digitize Storm Features (Catchbasins/Inlets, Outfalls, Gravity

Mains, Underdrains, Manholes)

• Step 3– Digitize Storm Features (Catchbasins/Inlets, Outfalls, Gravity

Mains, Underdrains, Manholes)

Gravity Main

Inlet

Outfall

Manhole

*Source – Google

• Step 4a – Collect any attributes associated with the Storm Features from

the plan drawings (e.g. Pipe size and Type of Construction)

• Step 4a – Collect any attributes associated with the Storm Features from

the plan drawings (e.g. Pipe size and Type of Construction)

Pipe Size

Type ofConstruction

• Step 4b – Collect any attributes from the profile drawings (e.g. Invert

Elevations, Slope)

• Step 4b – Collect any attributes from the profile drawings (e.g. Invert

Elevations, Slope)

Slope

Pipe Size

Invert Elevations

• Step 5 – QA/QC attribute table for

each storm feature class, checking for missing attributes or inconsistencies.

– Check for large gaps or congested areas in the data • Missing subdivision as-

built drawings• New Construction

– Use model’s Domains to attribute features where possible.

ESRI’s Local Government Data Model• ArcGIS for Local Government

– “ArcGIS for Local Government includes a series of maps and apps designed to work together across various departments.” Source: ESRI

– Reduces the complexity of implementing and managing GIS in a local government setting.

• Model supports multiple data schemas.

Local GovernmentData Model

Infrastructure

LandRecords

Elections

PublicSafety

Planning andDevelopment

Address

PublicWorks

Facilities /Campus

Data Schema - Stormwater• http://help.arcgis.com/en/localgovernment/

datadictionary.html

Problem – Using a ArcGIS 10 Data Model within ArcGIS 9.3 Software

• Data model contains relationships setup in 10.X, which do not communicate with 9.3.

• Tools developed specifically for Data Model only accessible in 10.X– Attribute Assistant– Infrastructure Abandon Models– Infrastructure Desktop Construction Tools– Infrastructure Editing– Infrastructure Reporting

Data Model Tools• Attribute Assistant – Advanced

capabilities to calculate attribute data.– Four ArcMap Commands and one ArcMap

Toolbar• Infrastructure Desktop Construction Tools

– Four new point construction tools and one new line construction tool.

• Infrastructure Desktop Toolbars– Infrastructure Editing– Infrastructure Reporting

Setting Up a Geometric Network• Step 1a & b – Network Name, Snapping Tolerance & Features

• Step 2a & b –Enable Values and Select Roles for each Feature Class

Setting Up a Geometric Network• Step 3 – Add Weights to Network

• Step 4 – Review Results

Modify Sources & Sinks after Creation

Quality Assurance/Quality Control• Setup a Geometric

Network and Update Connectivity between Storm Features.

• FYI – The Geometric Network Tool only works with an Editor or ArcInfo License

• Compare features collected to As-Built drawings (features and attributes)

Lessons Learned• Update Domains prior

to data entry as much as possible.

• Use an unmanaged Raster Catalog.

• Start Project with Data Model and Geometric Network

Conclusion• ESRI’s Local Government

Model Schema works with older versions of ArcGIS without having to upgrade.

• Converting As-Built Drawings to Digital Format takes time up front but is a more manageable system in the long run.

Questions?

Adam Pooler, GISP• Adam.Pooler@stantec.com

Troy Sova• Troy.Sova@stantec.com