The Hidden Cost of 'Not Found': ATRP vs ARP
The average that flatters you
Every rank-tracking report has a number that’s designed, whether anyone intended it or not, to look good: the average position across the points where a business was actually found. Call it ARP (Average Rank Position), and it’s a completely normal thing to calculate. The problem isn’t the math. It’s what happens to the points that aren’t in that average at all.
If a business is scanned at 49 points across its service area and shows up in the top 20 at 34 of them, averaging position 4.1, most reports stop right there. 4.1 sounds like a result worth screenshotting. What they don’t show is the other 15 points, just under a third of the area, where the business wasn’t found at all. Those points don’t lower the average. They vanish from it, quietly, the way a bad quarter vanishes from a highlight reel.
What “not found” actually costs
“Not found” isn’t a neutral, missing data point. It’s a customer, at a real location, who searched and got a map with this business nowhere on it. Local search doesn’t have a runner-up prize for businesses that rank well somewhere else — a searcher three kilometers outside the visible zone sees competitors, picks one, and never learns the business existed. A 4.1 average built on the two-thirds of the map that flatters it says nothing about that customer, or the dozens like them across the invisible third.
That’s the actual cost of averaging away “not found”: not a rounding error, but a blind spot exactly the size of the area where a business is losing customers it never sees leave.
Why ARP alone can’t fix this
The instinct might be to just look at ARP more carefully, or track it over time. That doesn’t help, because the flaw isn’t in how ARP is calculated — it’s in what gets included before the calculation starts. A business could improve its visible-zone rankings from 4.1 to 3.2, look like it’s winning, while its actual footprint shrinks from 34 found points to 28. ARP would go down, a technically better number, while the business is measurably losing ground. An average that only counts good news structurally cannot report bad news, no matter how precisely it’s computed.
This is exactly the gap SeoMap reports a second, deliberately different number to close: ATRP, Average Total Rank Position. Same grid, same scan, but the average runs across every point — the found ones and the not-found ones together. A not-found point doesn’t disappear; it counts as a below-the-cutoff result and pulls the average down accordingly. Run the same 49-point example through ATRP instead of ARP and the number moves from a flattering 4.1 to something that reflects the real third of the map where the business doesn’t exist. Neither number is wrong — they answer different questions. ARP answers “how well do we rank where we’re visible?” ATRP answers “how well are we actually doing across the whole area that matters?” — and the second question is the one a business, agency, or client is actually trying to answer when they ask about their ranking. Full definitions and a worked example live in the ARP vs. ATRP breakdown.
A pattern worth watching
Not every local rank-tracking tool handles “not found” the same way, and a shared metric name doesn’t guarantee a shared formula — worth checking directly with any tool before comparing numbers across platforms. What’s common across the category is the incentive: an average that only includes found points will, structurally, always look better than one that doesn’t, regardless of what any specific tool chooses to do about it. That’s not a reason to distrust every rank number you see — it’s a reason to ask, specifically, whether “not found” is counted or dropped before trusting an average at face value.
The size of the gap between a business’s ARP and ATRP is itself a diagnosis. A small gap means the business is found almost everywhere it’s scanned — consistent, low-risk visibility. A large gap means a strong core surrounded by a visibility cliff: good rankings close to the address, nothing a few kilometers out — precisely the pattern that’s worth cross-referencing against Share of Local Voice, which reports that same gap as a straight top-3 percentage instead of an average.
What to actually do with it
None of this requires extra setup. Every SeoMap scan reports ARP and ATRP side by side automatically, at no extra credit cost, on every plan starting at Starter — there’s no toggle to find or feature to enable. The only real change is where to look: past the number that’s designed to reassure, at the one built specifically not to.