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This tool allows to produce a map which indicates the distance from a single location, such as a ‘walking distance to schools’. Time-based travel maps can be created for different two modes of transportation:  foot and motor vehicle. The newly created isochrones are saved as Earthlight layers in the repository. This is how generated and styled instance of Isochrones looks:

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1. Units:
   
   This field allows you to choose a base for generated isochrone. You can select one from the following bases:
   • Distance from start point – generates isochrone based on the entered distance.
     - metersmetres
     - kilometres
     - feet
     - yards
     - miles
   • Time from start point – generates isochrone based on time.
     - minutes
     - hours
     
     

2. Value and unit
   Here you can enter value/values for the selected units. 

   Info
   Generate Isochrone tool accepts 3 types of characters in value field: numbers, commas and dots. You can use them all together in the value field, for example: - Isochrone with 3 different distances: 300,700 and 1000 metres - Isochrone with 3 different distances: 0.5, 1.5 and 3.5 kilometres

   
   There are two types of isochrones: monovalent and multivalent

   • Monovalent isochrone

     

     In this scenario, generated isochrone will be based on just one value. This is how monovalent isochrone instance looks:

     

   • Multivalent isochrone

     

     Info
     In case of multivalent isochrones you need to separate each value with coma "," character.

     Multivalent isochrones allows you to display few values in a single isochrone. This is how multivalent isochrone layer looks:
     
     
     

3. Locomotion type
   
   This section allows you to select a locomotion type. Earthlight supports two locomotion types: foot and motor vehicle.
   
   
4. Control buttons
   
   This section contains 2 buttons:
   • Generate – if all isochrone settings are configured you can click this button to start the operation.
     In the case when Values field is empty it won't be possible to generate an Isochrone. 
     
   • Cancel – this button is closing the Generate Isochrone Settings window. Settings are not saved.
     
     

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To learn more about styling isochorne layers please follow this link: Style Isochrones