Dustan Brown
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Outpost / Offline GMRS mapping

Where does the signal reach?

An offline basecamp tool for planning GMRS coverage tests and recording what comes through.

Outpost planning layer with map waypoints, checkpoint list, and radio assignments.
Planning layer. An offline map with editable waypoints, radios, and checkpoints.

Built for hills, trees, and radio checks

I needed an offline mapping tool to help build a GMRS radio coverage map of private property with several hills and dense forest. The main intention was to use it as a mobile basecamp at a potential repeater location.

Outpost gives that basecamp a map-based plan and a place to record observations. Prepare locations and expected contacts before testing, then log signal ratings and notes as the radio checks happen.

How it works

  1. 01 / Prepare

    Bring your own map

    Import and crop a map image. Add editable waypoints over it to mark the locations you want to use.

  2. 02 / Plan

    Put radios in place

    Create checkpoints, assign radios to waypoints, and specify the contacts you expect to test.

  3. 03 / Review

    Record what happened

    Select the radios involved in a contact and log a signal rating and notes against the checkpoint.

Outpost execution layer showing Checkpoint 6, radio contact lines on the map, and observed-call signal ratings.
Execution layer. Checkpoint review brings radio placements and recorded call ratings together.

Field observations, kept with the plan

The map provides the setting; the radio checks provide the observations. Outpost records contacts and their signal ratings rather than predicting coverage from terrain. Waypoints remain editable, and the plan and recorded results are saved locally.