For airport & aviation-adjacent designers
See the obstruction before you file.
LOS Analyzer screens whether a proposed structure breaks a control tower's line of sight to the runway — casting tower-to-runway rays over live satellite imagery. Get a defensible read on your site in minutes, long before a 7460-1 ever leaves your desk.
- Standard
- Aligned to FAR Part 77 & ATCT LOS
- No engineering consult to start
- Methodology published in full
The screening tax
Feasibility shouldn't cost weeks and a five-figure consult.
Today, finding out whether a structure threatens a tower's sightline means manual diagram work, back-and-forth with consultants, and a long wait — often for a site that never breaks ground. The cost of asking "is there even an issue here?" is wildly out of proportion to the question.
LOS Analyzer compresses that first answer into minutes, so you can iterate on massing and siting while it's still cheap to change them.
Traditional
2–6 weeks
- Manual diagram measurement
- Consultant scheduling
- Up-front cost before feasibility
- Slow design iteration
With LOS Analyzer
~5 minutes
- ✓ Automated tower placement
- ✓ Self-serve, on demand
- ✓ Pay per screening
- ✓ Iterate in real time
Three steps
From site plan to sightline, fast.
Locate the field
Search any airport by name. We place the control-tower cab from a seeded database of the top 100 US fields — or drop and adjust it yourself on satellite imagery.
Drop in the structure
Upload a site plan, survey, or rendering as PDF, PNG, or JPEG. Coordinates are pulled automatically — signed decimals or DMS — with OCR fallback and manual override.
Read the sightline
We cast rays from the tower across every runway and render blocked sightlines, the shadow footprint, and a side-profile elevation — instantly, on screen.
Capabilities
Engineered for the screening stage.
Everything you need for a defensible preliminary read — and nothing that pretends to be a final FAA determination.
360° ray-cast obstruction map
Rays sweep from each tower at 1° spacing over satellite imagery. Blocked bearings and the shadow cast behind your structure are drawn live on the map.
Side-profile elevation view
A true vertical section from tower eye to runway end — LOS line, building silhouette, and the exact angle by which a structure clears or breaks the sightline.
Automatic coordinate extraction
Four-tier parsing reads signed decimals and every DMS notation; Tesseract OCR handles scanned drawings. Every value is editable before you run.
Multi-tower, multi-runway
Screen several towers and runway ends in a single pass. Each tower-to-runway pair gets its own determination and elevation profile.
Satellite-grounded geometry
Built on Google Maps Platform imagery and Turf.js geodesy, with a flat-earth projection accurate to <1% under ~5 miles — the right tool for the screening stage.
Transparent, exportable record
No black box. Assumptions, inputs, and limits are spelled out in the methodology, and results export to a shareable report for your file and your PE.
Where it fits
A pre-screen, in its proper place.
LOS Analyzer sits at the front of the obstruction process — informing whether (and how) to file, never replacing the FAA's determination or your professional engineer.
- 01
Site concept
Designer / developer
- 02
LOS pre-screen
← you are here
- 03
Form 7460-1
Notice of construction
- 04
OE/AAA study
FAA aeronautical review
- 05
Determination
Hazard / no hazard
Clear sightline → support a simpler 7460-1. · Blockage detected → refine the design before you file.
Pricing
Pay for the screening, not a subscription you forget.
No contracts. Credits don't expire. Scale up only when you need to.
Single Analysis
One-off feasibility check on a single site.
- One complete analysis
- Side-profile + ray-cast views
- Shareable report export
- 2D Part-1 screening
5-Pack
For firms juggling several sites. Save $596.
- Five complete analyses
- Credits never expire
- Project organization
- Team sharing
- Priority support
Annual Seat
Unlimited screening for high-volume aviation practices.
- Unlimited analyses
- White-label reports
- Advanced 3D (Phase 2)
- API access
- Phone support
No black box
Built for people who'll be asked to defend the number.
Every assumption is on the table — the flat-earth projection and where it breaks down, the 2D ray model, tower-cab height defaults, and the limits of OCR extraction. We publish the geometry, the data sources, and exactly where this tool stops and a licensed PE begins.
Read the full methodology- FAR Part 77 surfaces & ATCT line-of-sight framing
- Turf.js geodesy on Google Maps imagery
- Documented accuracy envelope (<1% under ~5 mi)
- Prominent preliminary-screening disclaimers
Screen your site before the next design review.
Upload a plan, place the tower, and read the sightline in minutes. Your first answer is only a few clicks away.