Geofencing for last-mile delivery

Last-mile delivery is the final, most expensive, and most customer-visible leg of the supply chain. Geofencing gives delivery operations precise, automated visibility into where drivers are relative to pickup points, delivery zones, and customer addresses — without requiring manual check-ins or a dispatcher watching a live map.

Fencemaker's approach is polygon-first: a delivery zone is a real PostGIS polygon, not a radius approximation, so a rider crossing into a dense apartment block or a dark-store catchment area triggers exactly one event, not a cluster of false positives from overlapping circles.

What it unlocks

Automated delivery-zone detection — instantly know when a rider enters a customer's geofence, triggering a "driver is nearby" notification without polling GPS coordinates on a timer.
Proof of delivery accuracy — timestamp and geotag delivery confirmation the moment a driver is inside the correct zone, cutting down on disputed deliveries.
Dynamic ETAs — recalculate and push arrival estimates from real entry/exit events instead of raw GPS pings.
Zone-based routing rules — restrict which riders can serve which delivery zones, useful for dark-store and micro-fulfillment models.
Reduced support load — fewer "where is my order" tickets when customers get automatic proximity alerts.
Fraud & leakage prevention — flag deliveries marked "complete" from outside the destination geofence.

How the trigger flow works

A rider's app reports location, Fencemaker checks it against every active delivery-zone polygon, and fires a webhook the instant a boundary is crossed:

{
  "event": "entered",
  "device_id": "RIDER-042",
  "territory_code": "ZONE-DOWNTOWN-7",
  "lat": 12.9716,
  "lon": 77.5946,
  "timestamp": "2026-08-18T09:14:02Z"
}

That payload lands wherever you route it — a Slack channel for ops visibility, a Telegram bot for rider-facing alerts, or a signed HTTPS endpoint that feeds directly into dispatch. No custom polling infrastructure, no separate location database to maintain, and because it's self-hosted, delivery location history stays on infrastructure you control.

If your delivery stack is currently stitching together a geolocation library and a cron job to approximate this, Fencemaker replaces that with a purpose-built trigger layer — built for exactly this kind of high-density, high-event-volume delivery operation. Country-specific breakdowns, including density and data-residency considerations, are below.