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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. Generate based on:
   
   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.
   • Time from start point – generates isochrone based on time.
2. Value and unit
   Here you can enter value and select a unit type for the base selected in the Generate basing on field. This field allows to select one from the following units:

   • Units for Distance from start point base:

     

     • meters

     • kilometers

     • feet

     • miles

   • Units for Time from start point base:

     

     • minutes

     • hours

     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:

   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 already styled 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 already styled 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. Create range areas in results
   
   This option allows you to change the way how isochrones are being generated. The standard method generates only routes (lines). By using Range areas method you can see polygons which completely cover the selected area. This is how already styled multivalent isochrone with range areas layer looks:
   
5. Control buttons
   
   This section contains 2 buttons:
   • Generate – if all isochrone settings are configured you can click this button to start the operation.
   • 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: http://statmap.co.uk/?page_id=8654Isochrones