Geographic Information Systems

Our GIS group offers first-hand public agency experience, as well as a broad range of GIS skill levels, and an enterprise focus to deliver solutions essential to creating an effective and value-based GIS.


  • Local Government GIS Staffing Services – Onsite and Offsite
  • General GIS Services - Data Development/Maintenance, Map Creation and Analysis
  • GIS Project Management
  • ArcGIS Enterprise Implementation and Upgrades
  • ArcGIS Online Startup and Deployment
  • Enterprise Web GIS Application Development
  • Public Access Web GIS Development – Story Maps
  • Mobile GIS Workflow Development
  • GIS Integration with 3rd Party Business Systems - Permitting, Asset Management, and 911
  • Automation of Routine GIS Data Tasks
  • GIS Assessment/Recommendations
  • Training and Mentoring

Key Contact

Mark Dumford, GIS Group Leader
(916) 273-4682

Featured Projects

GIS Support for Migration to ArcGIS Online

Client: City of Antioch

The Interwest GIS Team worked with the City's staff to understand the specific requirements needed for a new ArcGIS Online deployment inclusive of multiple mapping applications. Our team migrated GIS data into an ArcSDE geodatabase design, built and published map services from ArcGIS Server, managed the startup and deployment of the City’s ArcGIS Online account, and built 7 department-focused GIS mapping applications. The City staff are now able to use these mapping applications to quickly resolve daily issues and answer important questions.

ArcGIS Enterprise Implementation and Deployment

Client: City of Napa

The Interwest GIS Team worked with the City's staff to understand and document their vision for an enterprise deployment of GIS tools and services across all City departments. Our team's work focused on installing and configuring ArcGIS Enterprise, including Portal to store and publish map-related content. Additional work on the project included collaborating with City staff to set up single sign-on with Portal, Enterprise Sites, and Web GIS application development. This project set the foundation for future GIS development in the City of Napa.

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