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 — automatically extending to ITM (Longley-Rice) and FSPL+ITU-R P.526 for backhaul and mmWave frequencies — 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, ITM & FSPL+P.526
Led by 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. GridVisio automatically extends into ITM (Longley-Rice) for microwave backhaul and FSPL+ITU-R P.526 for mmWave links — no gap in your frequency plan goes uncomputed.
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, antenna gain, mechanical downtilt, and vertical beamwidth — real hardware values you enter once per sector — not a generic, one-size-fits-all assumption. Downtilt is modelled as a vertical antenna pattern adjustment, reducing effective gain for grid points above or below the boresight angle.
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 by default — 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. GridVisio also supports ITM (Longley-Rice, 20 MHz–20 GHz) for microwave backhaul and FSPL+ITU-R P.526 (30 MHz–100 GHz) for mmWave links, configurable per project.
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, antenna gain, downtilt angle, and vertical beamwidth — four fields on the sector form, all with sensible defaults if you don't have the exact datasheet values handy. Everything else (terrain, land cover, your project's link-budget assumptions) is already handled by GridVisio.
Does antenna downtilt affect the prediction?
Yes. Each sector has a downtilt field (negative = downtilt, e.g. −5°) and a vertical beamwidth field. For every grid point, GridVisio computes the elevation angle from the antenna to that point and applies a standard parabolic vertical pattern adjustment — the same model used in 3GPP and ITU antenna specifications. Grid points well above or below the boresight angle receive reduced effective gain, which is reflected in the heatmap. The default is 0° tilt and 10° vertical beamwidth, so existing sectors produce the same result until you update those values.
Is this available on every plan?
It's a Pro plan feature. The 14-day free trial also gets access, capped to a flat 5 km generation radius — enough to see it genuinely working on your own network before you decide to upgrade. Pro's own ceiling scales with each sector's beamwidth rather than one flat number, since a narrow sector covers far less real ground than a wide one at the same radius — up to ~22 km for a narrow 3° sector, ~18 km for a typical 45° sector, down to ~9 km for a fully omnidirectional one. (US locations currently; the other six supported LiDAR regions keep a flat 15 km ceiling for now.)
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 5 km radius. No credit card required.
