What is True-north orientation (in emergency mapping)?

True-north orientation is the mapping principle that a site plan or responder map should be aligned to true north, or clearly indicate north, so that responders can match the map to their real-world bearings.

True north (also called geographic north) is the direction toward the geographic North Pole, and it differs from magnetic north, which is where a compass needle actually points and which drifts over time and location. USGS topographic maps mark this distinction with a diagram showing true north (a star symbol), grid north, and magnetic north and the angles between them. Indicating north consistently lets multiple responding agencies describe directions and locations the same way.

Defined from authoritative sources

This definition is drawn from the sources below, last verified 2026-06-23. How we verify.

1. USGS: What do the different north arrows on a USGS topographic map mean? verified 2026-06-23
2. USGS: What is declination? verified 2026-06-23

Keep reading

• Gridded floor plan / x-y grid overlayDefinition
• Responder-ready mapDefinition
• Site plan / floor plan standard for first respondersDefinition

From definition to deployment

See how responder-ready mapping works for K-12 schools, where your state stands, and the grants that can fund it.