Technology
GIS in local government: what it does and how it is built
The role of geographic information systems across agency functions and the components of a modern GIS.
Nearly every local government function has a location component. Geographic information systems manage that spatial data and make it usable for planning, operations, public safety, and public communication.
Where GIS is used
- Planning and permitting. Parcels, zoning, land use, and development review.
- Public works and utilities. Pipes, valves, poles, signals, pavement, and their condition.
- Public safety. Address points, response boundaries, incident mapping, and NG911 routing data.
- Assessment and finance. Parcel data linked to valuation and tax.
- Elections. Precincts and polling locations.
- Public information. Web maps for residents on everything from trash pickup to flood zones.
Components of a modern GIS
Enterprise geodatabase. The authoritative store for spatial data, with versioning and editing controls.
Web GIS. Services that publish data and maps to applications, and portals where staff and the public access them.
Desktop tools. For analysts and editors doing detailed work.
Field applications. Mobile data collection and inspection tools that work offline.
Integrations. Links to permitting, asset management, dispatch, and finance systems so location data is shared rather than duplicated.
Data standards. Schemas for addresses, parcels, and assets, and quality rules that keep them consistent.
Platforms
Esri's ArcGIS dominates local government. Open-source alternatives, including QGIS and PostGIS, are used alone or alongside it, particularly for analysis and backend storage.
Common problems
Multiple address sources that disagree, boundaries digitized long ago that do not match neighbors, undocumented layers, and integrations built by staff who have left. Most GIS modernization projects are data quality and integration projects.
Governance
A GIS coordinator or committee, data stewards by layer, publication standards for public maps, and privacy rules for anything showing individuals' locations.