Drawing only - a hidden building still screens sound.
Compliance limits
Full solve
Import from a GIS file
Shapefile, GeoJSON, KML or GeoPackage.
Runway, roads, buildings, a mine or quarry boundary.
Layers to fetch
Choose layers, then fetch.
Ground elevation
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Layers
Receiver labelsFeature namesShow on map
Blasting
Airblast overpressure, predicted from the cube-root scaled distance
after USBM RI 8485. Separate from the noise model - a blast is a peak,
not an energy average, and its energy sits below the lowest band the
propagation engine resolves.
Scenarios
One site, several variants. Everything not overridden is shared, so
terrain, buildings and receivers stay identical across scenarios.
Your first noise map, step by step. Each step ticks itself when the site
actually has the thing, so you can work in any order.
Import coordinates
Paste a table or choose a file. Decimal degrees, degrees-minutes-seconds
and projected grids are all accepted; columns are recognised from a
header row. Nothing is created until you have seen the list.
Custom bands and colours
Set the level thresholds and pick a colour for each band. Quietest at
the top. The last band is open-ended.
3Ddrag rotate · shift-drag pan · wheel zoom
Ask about this model
Ask what is driving a level, what a measure would be
worth, or for a plain-language summary for a client. Answers use the
figures this model has computed - nothing is estimated.
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Place a runway
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Thresholds, length, width and surface come from the
aerodrome survey, so the start of roll is where it really is.
Click the two thresholds -
the ends of the paved strip - then press Finish. Set the published
length afterwards if you know it; the flight path is measured from
it.
Aircraft noise
×
×
Step 1 of 2
Where is this site?
Set the calculation area first. It decides what the noise map covers,
what gets pulled in from OpenStreetMap, and the extent every result is
reported over. You can change it at any time.
Noise map area
The calculation boundary. Sets the extent the noise map is computed over,
and the bounding box used when importing OpenStreetMap data.
Drag its corner handles on the map to resize.
Free-form: click each corner on the map, then Finish. The noise map is
computed and drawn only inside the shape you draw.
Click to place · shift-click a vertex to delete it
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