I maintain the data.
See how a finding connects to a source record and a review decision.
Follow the analyst’s workflowAn independent public-safety practice
Public safety,
closer to
ground truth.
Look at how a system is supposed to work. Go see what actually happens. Investigate the gap, and build something useful.
Groundtruth builds tools for the people responsible for NG9-1-1 GIS data. The central work is Validation Workbench: local data validation and review for the road, address, and service-boundary data your 911 program relies on.
On while I build
Dat New NewKid Cudi
Follow the threadFictional example
One record. Three distinct facts.
Source value
State_L: ZZRoad centerline
RCL-0147@example.testCheck assessmentCritical
The value is outside the state domain.
Human reviewReviewed
Transcription error confirmed; source correction assigned.
The decision is recorded. The source value and check assessment remain unchanged.
A fictional record, processed with the Workbench’s domain-check and review functions. Open the walkthrough.
Observe / Investigate / Build / Document
Tools, investigations, and public records for the places where public-safety systems lose sight of people.
Available now · Free public beta
Groundtruth Schema Bridge
Moving between supported NENA data-model versions? Start with the conversion tool.
NG9-1-1 GIS quality assurance
A data check should lead to a useful decision.
Between a validation result and a corrected dataset, someone has to resolve the issue. The Workbench makes that review part of the work: the affected record, the decision, and the reason stay connected.
For GIS analysts, that means a result they can act on. For managers and program leaders, it means a review record they can follow. Source corrections remain in the organization’s GIS editing workflow.
Validation Workbench · In development
- Find the affected record.
Results reference the source identifier, with spatial results when geometry can be attached.
- Keep the human explanation.
Record a review decision without replacing the check’s original assessment.
- Return with context.
A recurring finding starts a fresh review with the earlier decision linked as history.
Find your place in the work
One data issue.
Several responsibilities.
The person reviewing an anomaly, the person accountable for the data, and the person approving a purchase need different starting points.
I lead GIS or a 911 program.
See where local quality control fits before data moves into the next system.
Find your team’s responsibilitiesI evaluate tools or partnerships.
Inspect the workflow, operating requirements, and a concrete evaluation scope.
Evaluate fitWorking across roles, assessing technical fit, or just curious? See all six starting points.
The work beyond the software
Knowledge should travel.
Some problems need a tool. Others need a question asked in public, or a place for practitioners to share what they know.
For people doing the work
The Aggregation Point
TAP is Groundtruth’s vendor-neutral NG9-1-1 practitioner community. Its existing forum gives questions, practical tools, and local knowledge a place to reach other people.
Meet the communityFor people trying to understand the system
CALL WAITING
What happens between calling 911 and help arriving? This developing investigation follows the records, definitions, and responsibilities behind that question.
Follow the investigationPublic Record
Follow the work as it changes.
19 September 2026
From the practice
Why the work is taking this shape
I did not begin with an organization chart. I kept following problems. Sometimes the problem needed a tool. Sometimes it needed a map, a public record, or a better account of who
Read the postPut a real workflow at the center.
A useful development partnership starts with a defined data-quality problem, the people responsible for it, and a result they can evaluate.