Predict signal strength — not just a polygon guess.
GridVisio's RF Propagation Heatmap predicts real signal strength across your entire coverage area using ITU-R P.1812 — an internationally standardised radio propagation model — instead of a flat radius circle. See exactly where signal is strong, marginal, or unusable, computed from your real terrain, land cover, and each sector's actual transmit power and antenna gain.
Multi-color signal-strength heatmap, generated from real terrain and link-budget data
A real propagation model, not a coverage circle
A sector radius tells you the shape you configured. The heatmap tells you what's actually predicted to happen inside it — every point computed individually from terrain, land cover, and hardware.
ITU-R P.1812
The same internationally standardised, ITU-published point-to-area propagation model used by professional RF planning tools, purpose-built for shorter terrestrial fixed-wireless links in the 30 MHz–6 GHz range — not a broadcast-range model repurposed for WISP use.
Real terrain & land cover
Every grid point uses real elevation data plus land-cover-aware vegetation and building height estimates — the same terrain pipeline behind GridVisio's LoS Link Check tool, not a simplified planning approximation.
Real link budget
Uses each sector's actual transmit power and antenna gain — real hardware values you enter once per sector — not a generic, one-size-fits-all assumption.
Two display modes
A detailed multi-color signal-strength layer for internal planning, and a simple "covered / not covered" view for public, embeddable shared map links — from the same underlying computed grid.
Generate per sector, tower, or project
Trigger a heatmap for one sector, a whole tower, or your entire project in one click. Generation runs in the background — track progress on a dedicated status page while you keep working.
Honest about its limits
A statistical prediction from terrain and land-cover estimates, not a measurement. We say so plainly — treat it as a planning aid for where to focus a closer look, the same honest framing as GridVisio's Fresnel clearance tiers.
Plan internally, share externally
The multi-color layer is built for your own planning — configurable signal-strength bands across the map, viewport-filtered the same way towers and subscribers already are.
For clients, regulators, or grant reviewers, switch to the single-color public view on a shared map link — a clean "covered / not covered" picture against one configurable threshold, no internal signal bands exposed.
Single-color public view on a shared map link
Generated from the tower you're already looking at
No separate workflow to learn — open a tower on your coverage map, and generate a heatmap for one sector or the whole tower right from its detail popover. A project-wide option covers every tower in one click.
Every run is tracked on a dedicated status page, with per-sector progress for multi-sector requests — so a tower with five sectors finishing with four done and one failed doesn't lose the four that succeeded.
Generating a heatmap from the tower detail popover
Frequently asked questions
What propagation model does the heatmap use?
ITU-R P.1812 — an internationally standardised, ITU-published point-to-area propagation model designed for terrestrial links in the 30 MHz–6 GHz range, the frequencies most fixed-wireless WISP gear actually runs on.
Is the heatmap a guarantee of real-world signal strength?
No, and we won't claim otherwise. It's a statistical prediction from terrain and land-cover estimates, not a measurement. Real signal at any given point can differ due to local conditions the model can't see — a single building, foliage density at the exact spot, multipath effects, equipment variance. Treat it as a planning aid for where to focus a closer look, such as a real LoS Link Check or a site visit.
What data does it need that I don't already have?
Each sector needs its real transmit power and antenna gain — two fields on the sector form. Everything else (terrain, land cover, your project's link-budget assumptions) is already handled by GridVisio.
Does antenna downtilt affect the prediction?
Not currently. Every point within a sector's azimuth and beamwidth wedge is treated as receiving that sector's full antenna gain, regardless of elevation angle. This is a deliberate scope decision, not an oversight, and we're upfront about it.
Is this available on every plan?
It's a Pro plan feature. The 14-day free trial also gets access, capped to a 2 km generation radius — enough to see it genuinely working on your own network before you decide to upgrade.
Can I show this to a client without giving them a GridVisio account?
Yes. Enable the heatmap option on a shared map link, and they'll see the single-color "covered / not covered" view — no account or login required, and none of your internal signal-strength bands exposed.
See your real coverage, not a coverage circle
14-day free trial — heatmap generation included, capped to a 2 km radius. No credit card required.
