Built with Canadian elevation data

Coverage mapping that knows the difference
between a 30m DEM and real Canadian terrain.

Most coverage tools built for the US market treat Canada as an afterthought — same 30m global elevation model everywhere, no matter what's actually free and public north of the border. GridVisio pulls Natural Resources Canada's own 1m HRDEM surface data automatically wherever it exists, from a Chatham-Kent backhaul link to a Northern Ontario tower site, and falls back gracefully where it doesn't.

Start 14-day free trial See the LoS checker

A real link check running on HRDEM-sourced terrain, not a generic global DEM

Why Canadian WISPs end up here

Not a US tool with a Canada checkbox bolted on. The elevation pipeline, the plan limits, and the export options were built around how independent wireless ISPs actually operate here.

Real HRDEM, not SRTM

NRCan's High Resolution Digital Elevation Model — 1m surface data, buildings and treeline included — is pulled in automatically wherever it's been flown. No setting to enable, no separate import step. Where HRDEM hasn't reached yet, links fall back to SRTM 30m rather than failing outright.

Long-haul backhaul, actually checked

10km link length on Starter, 20km on Pro — enough for a real cross-lake or cross-valley backhaul hop, not just a last-mile drop. Fresnel clearance, bearing, and FSPL are computed the same way regardless of link length.

Honest verdicts for grant paperwork

Clear, Borderline, or Obstructed — Borderline is flagged as inconclusive instead of rounded up. If you're documenting a Broadband Fund or Universal Broadband Fund build-out, a reviewer checking your numbers gets the same answer GridVisio gave you, not an optimistic guess.

Predicted signal, not just geometry

ITU-R P.1812 propagation prediction alongside the Fresnel check, extending to ITM or FSPL+P.526 outside its frequency range — a dBm number and, with a CPE model selected, an estimated Mbps. The same engine drives the RF Heatmap so numbers never contradict each other.

Find where to build next

Import your own subscriber list and GridVisio clusters unserved locations by density (DBSCAN), then estimates reach from a hypothetical tower before you commit to a site visit. Useful whether you're chasing a federal fund or just deciding where the next tower goes.

Coverage widget for your own site

Embed an address-check widget on your website. A visitor's address gets a real LoS check against your nearest towers, not a polygon overlap — so the lead you receive already tells you which tower would serve them.

Terrain doesn't stop at a straight line between two dots

A backhaul hop across the Ottawa Valley, a link skirting the Niagara Escarpment, a tower reaching across a stretch of the Canadian Shield — these are exactly the cases where a coarse 30m elevation model quietly gets the answer wrong. HRDEM's 1m resolution catches the ridge, the treeline, or the rooftop a generic DEM smooths over.

Where NRCan hasn't flown a given stretch yet, GridVisio doesn't just show an error — it falls back to SRTM 30m automatically and tells you which source it actually used for that result, every time. You always know how much to trust the number in front of you.

Fresnel clearance computed against real 1m surface data, not a smoothed approximation

One coverage map, every layer you actually maintain

Towers and sectors, subscribers, saved LoS links, unserved clusters — all on one map, toggleable by layer. Run an RF Heatmap per sector or per tower and see predicted signal strength across your whole footprint, using the same propagation model as the link checker.

Export a clean PDF or PNG of any link check for a customer file, an internal record, or a funding application — no extra formatting step, no per-file fee.

GridVisio RF coverage heatmap over a WISP service area

RF Heatmap for a sector, driven by the same propagation engine as the LoS checker

Frequently asked questions

Does GridVisio actually cover my part of Canada?

It depends on where NRCan's HRDEM program has flown, which is expanding but not yet nationwide. Wherever HRDEM data exists for a link or heatmap area, GridVisio uses it automatically at 1m resolution. Outside HRDEM coverage, it falls back to SRTM 30m rather than refusing to run — and the result always states which source it used, so you're never guessing.

What's the difference between HRDEM and the SRTM data most tools use everywhere?

SRTM is a 30m-resolution global radar dataset — fine for a rough first pass, but it can miss a ridgeline, a treeline, or a rooftop that sits inside a single 30m cell. HRDEM is a 1m surface model flown specifically over Canada, so features that actually intrude on a Fresnel zone show up instead of getting averaged away.

Can I use this for a CRTC Broadband Fund or Universal Broadband Fund application?

GridVisio isn't a filing tool for either program and doesn't generate their specific application forms. What it does give you is exportable, defensible link and coverage data — terrain profile, Fresnel clearance, predicted signal strength — as a PDF or PNG you can attach to whatever documentation the application requires.

Is pricing in Canadian dollars?

Billing is in USD — $19/month Starter, $39/month Pro, both with a 14-day free trial and no credit card required to start. There's also a permanent $0 Free plan with core Starter features included.

Do I need to import my own subscriber and tower data?

Yes — towers, sectors, and subscribers are imported via CSV/XLSX or entered directly on the map. Once they're in, white area detection, reach estimates, and the RF Heatmap all run against your real network, not a sample dataset.

Coverage mapping that knows the differencebetween a 30m DEM and real Canadian terrain.