Odour Footprint

The odour footprint is calculated by first identifying the furthest measurement for each odour source at each intensity level recorded within the measurement data.

A 360° radial footprint is then rendered around each source zone, to map the furthest detectable reach of odour, creating a comprehensive spatial representation of odour dispersion.

Requirements

Before the footprint can be calculated, the site needs:

• At least one Source Zone - the location the odour is coming from.
• Measurement data assigned to the source zone/s.

If either is missing, the wizard shows a checklist telling you which one it is.

See zones, for more information.

Calculating the Footprint

1. Click the icon under Odour Footprint on the map toolbar, to access the Odour Footprint Wizard.

2. Select the intensity levels you want to show.

3. Enter a Footprint Percentile, if needed.

• Defaults to the 100th percentile, which uses the furthest measurement.
• Lowering it excludes the most extreme outliers.

4. Choose the calculation method under Calculate By.

5. Click the Calculate button.

6. Click the Clear button to remove the odour footprint from the map.

• You can also click the icon under Odour Footprint on the map toolbar, to clear the footprint without opening the wizard.

Odour Footprint: By Source

Calculate by source is selected as the default calculation method.

This displays the odour footprint calculated from all of the source zones, for each of the odour sources.

• Check Per Source to see the footprint for each of the source zones.
• Check Calculation to see how the odour footprint was calculated.

Tip: If you want to see the odour footprint for a specific source independently, filter the data by that source.

Odour Footprint: By Boundary

1. Click the Boundary selection.

2. Select the boundary from the dropdown menu.

3. Check Show Calculation to see how the odour footprint was calculated.

4. Click the Calculate button.

This displays the odour footprint calculated from the selected boundary, for each of the odour sources.

Note: The Boundary option is only available when the site has a boundary zone.

Odour Footprint: By Odour Hours

Calculates the footprint from the odour hour classification, rather than intensity.

Note: The Odour Hours option is only available when using the EPA Victoria (Australia) scales, and both Obvious Odour Hour and Subtle Odour Hour are selected in the odour hour filter.

Show Furthest Point

To see the furthest point from the source zones, click the Lines selection. This displays the line from the source zone to the furthest measurement.

Then click the Labels selection to show which source that measurement was attributed to.