This tool creates isochrones, also known as travel time polygons or catchment areas. It visualises all the locations that are reachable within a time limit based on selected parameters including transport mode & departure/arrival time.
Select the tool by clicking on it, then open the dialogue box under the dropdown arrow. Fill in the parameters, then either:
- Enter an address, and click
Run - Enter a lat-long point, and click
Run - Click on the map canvas
A new layer will be added to the project with the time. This layer is a temporary layer. If you need to save it, right click on it in the legend, and choose Make permanent.
| Parameter | Description | Data Type |
|---|---|---|
| Transport Mode | Method of transport | Picklist |
| Journey Time | The maximum journey time - allows up to 3 journey times | Text |
| Time Zone | Time zone | Picklist |
| Departure / Arrival Searches | Whether the calculated area will be for journeys departing or arriving at the chosen location | Picklist |
| Departure / Arrival Time | The departure or arrival time. This will get updated as per the time zone selected. | Calendar Format - dd/mm/yyyy hh:mm |
| Departure / Arrival Location (Address) | Text address of the departure / arrival location | Text |
| Departure / Arrival Location (Lat-Long) | Coordinates of the departure / arrival location | Text |
The Journey Time field cannot be left blank. In order to only return one or two isochrones, simply enter 0 as the value in the spare time fields.
The magnifying glass button can be used to verify the address or lat-long has been geocoded correctly, before running the tool.