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NG112 reference

Geodetic Location

Structured NG112 reference page.

112 readiness

Policy, location, routing, and response quality connected in one operational model.

Location

Geodetic Location

Geodetic data is valuable for mobile, outdoor, vehicle and app-originated emergencies. It can still be insufficient indoors or in dense urban environments unless uncertainty, altitude, floor or civic context is also available.

GNSS/network positioning
->
Coordinates + uncertainty
->
PIDF-LO geodetic object
->
Routing/display

What it does

Geodetic location represents position using coordinates such as latitude and longitude, often with uncertainty or confidence information.

Geodetic location helps route and locate callers when coordinates are more reliable than address fields.

How it works

  • Represents latitude/longitude and sometimes altitude or shape.
  • Carries uncertainty so systems know how precise the position is.
  • Can be compared against service boundaries for routing.

Key interfaces and protocols

  • PIDF-LO geodetic forms
  • GIS
  • Mobile location sources
  • PSAP map display

Systems it interacts with

  • AML
  • Mobile networks
  • ECRF
  • PSAP GIS
  • eCall

Common failure modes

  • Coordinates plot on a road but caller is inside a building.
  • Uncertainty is ignored by routing logic.
  • Indoor altitude is unavailable.
  • Coordinate datum assumptions mismatch.

Implementation considerations

  • Display uncertainty visually.
  • Combine with civic details where possible.
  • Test border and multi-jurisdiction edges.

Standards

  • IETF RFC 4119
  • ETSI TS 103 479

Related NG112 technologies

Related country deployments

No country deployments are listed here until independently verified against official or high-confidence sources.

Related articles

Sources

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