The Aoristic Chart tool is designed to check frequency of events (records) occurrences in selected span of time. Calculations are based on column which stores the event’s date. Afterward a chart is being generated which represents the event’s frequency by colours. A layer with a column that stores date/time of events is required.

The Aoristic Chart tool window contains 11 fields:

Layer
In this field you can set a layer which contains the data that you want to display on chart. You can also check Limit to selection option to generate a chart for selected records only.
Start time column
Here you have to set a column from the layer selected in 1st field. This layer must store date/time data.
End time column
If you store the event end time in a separate column, you can set it here. This field is optional.
Column intervals

This field allows you to set a column interval. You can select one from 5 interval types:
- Hours
- Weekdays
- Weeks
- Month days
- Months
You can also check additional options:
Row intervals

This field allows you to set a row interval. You can select one from 5 interval types:
- Hours
- Weekdays
- Weeks
- Month days
- Months
You can also check additional options:
Show cell values

This option controls displaying of values in centre of cells.
Start date
Here you can set start date for generated chart. You can use a calendar tool to point an exact date. To open the calendar please click on a small icon on the right side.
End date
Here you can set end date for generated chart. You can use a calendar tool to point the exact date. To open the calendar please click on a small icon on the right side.
Palette
This field allows you to configure colours palette for generated chart. To select a different palette please click on the preview of existing one . You can also use additional buttons to Reverse, Lighten or Darken currently selected palette.
This field contains 3 buttons:
- Calculate – this button executes the Aoristic Chart tool. After few seconds you will see a newly generated chart in the preview field.
- Save chart – this option becomes available when the new chart is generated. It allows you to save the chart on your hard drive as a PNG file.
- Save legend – this option becomes available when the new chart is generated. It allows you to save a legend for generated chart on your hard drive as a PNG file.
Preview
This field displays a preview of generated chart. Using Save chart button tool will generate PNG file with the same image.

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