ASIT Tutorial — Altitude Nexus

Step-by-Step Guide

Interactive Walkthrough

Use the arrows or click a step above to navigate. Each slide covers one stage of the analysis workflow.

Create Airport — replace with ASIT screenshot

Step 1 of 6

Setup

Search or create your Airport

Start by registering your aerodrome. ASIT uses ICAO designator, reference datum and aerodrome elevation to anchor all surface calculations to the correct geographic position.

ICAO code or name — used to identify your aerodrome across all modules.

Airport name — e.g. "Heathrow" or "EGLL" required.

ICAO aerodrome category — 1, 2, 3 or 4. Determines OLS dimensions.

Free Premium Authority

Choose a Module — replace with ASIT screenshot

Step 2 of 6

Select

Choose a Module

ASIT provides 7 specialised modules, each targeting a different type of aeronautical surface. Select the one matching your regulatory requirement and configure its parameters.

OLS — ICAO Annex 14 Obstacle Limitation Surfaces (most common use case).

OAS — for ILS CAT I/II/III and APV-Baro procedure design (OCA/H).

Custom — upload any KML, AIXM or DXF surface and evaluate obstacles against it.

View all included features

Add Runway Data — replace with ASIT screenshot

Step 3 of 6

Configure

Add more surfaces

Define each runway and its thresholds. You can configure multiple runways and multiple surfaces per aerodrome. IMPORTANT: Airport name must be EXACTLY as the one you already have defined, you can delete your airport to create a different one.

Add extra surfaces — make sure they have the same airport name to add extra surfaces.

Delete for new aerodromes — if you want to create a new aerodrome, delete the old one first.

Visibility in the directory — choose public or private.

ICAO Annex 14 Save included in Premium

Input Obstacles — replace with ASIT screenshot

Step 4 of 6

Analyse

Input Your Obstacles

Add one obstacle at a time, or upload an entire inventory via CSV batch upload. ASIT checks every obstacle against every surface simultaneously — no manual iteration.

Single-point mode — enter latitude, longitude and absolute altitude (MSL). Instant result.

CSV batch mode — analyse up to 1,000 obstacles (wind farms, building inventories) in one upload. Premium.

Tip: Altitude must be absolute (MSL), not height above ground. The widget auto-fills terrain elevation when you click the map.

Single point — Free Batch CSV — Premium

Read Results — replace with ASIT results screenshot

Step 5 of 6

Review

Read the Results

ASIT evaluates every obstacle against every surface and returns a structured result immediately. The 3D view lets you spatially verify infringements before committing to a report.

Obstacle Clear — the obstacle is below all evaluated surfaces. Shows clearance margin per surface.

Violation Detected — the obstacle penetrates one or more surfaces. Shows limiting surface and excess height.

3D visualisation — generated surfaces overlay the terrain. Scroll, rotate and zoom to inspect geometry.

Instant results All surfaces evaluated simultaneously

Download Report — replace with ASIT screenshot

Step 6 of 6

Export

Download Your Report

Generate a professional PDF evaluation report with a single click. Authority plan holders receive an official branded report with their authority logo — ready to submit to CAAs, planning authorities and ANSPs.

PDF report — includes obstacle data, surface results, clearance margins and all evaluated surfaces in a table.

KML, AIXM & GeoJSON export — share surface geometry with GIS tools, AutoCAD or aeronautical databases.

Audit log — every report generation is recorded. Premium and Authority users can export the full log.

Basic PDF — Free Official branded — Authority KML / AIXM / GeoJSON — Premium

Step 1 of 6

Who is ASIT for

Built for Aviation Professionals

ASIT is designed for technical users who need reliable, standards-compliant results — fast.

Aviation Consultancies

Run complete aerodrome safeguarding studies and instrument procedure designs in a fraction of the time of manual methods. Professional PDF output ready for authority submission.

Premium plan →

Airport Authorities & CAAs

Automate height clearance decisions. Embed the obstacle analysis widget directly on your authority website — applicants get instant results without your team handling every query manually.

Authority plan →

Wind & Energy Developers

Upload a CSV of hundreds of turbine positions and evaluate every one against airport OLS and OAS surfaces in a single batch. Get the aeronautical impact report before submitting to the planning authority.

Batch analysis — Premium →

How to Use ASIT