Insight
Modernizing Legacy GIS Stacks Without Downtime
Legacy GIS platforms often support critical workflows where downtime is unacceptable. The best path forward is phased modernization: isolate core services, containerize integrations, and migrate high-value layers first while legacy components remain operational.
What works in practice
- Start with a dependency and service inventory tied to business-critical workflows.
- Introduce API and data contract layers so old and new systems can run in parallel.
- Use staged ETL cutovers with rollback checkpoints and telemetry at each phase.
- Maintain governance continuity by preserving lineage, access controls, and audit trails.