To measure the area inside a field boundary, from a mapping window:
Ensure the correct field boundary layer is on top
Select the active tools menu on the left hand side
Select the measuring polygon tool (octagon with measuring tape)
Right click inside the field and select ‘Find complex polygon’
Right click again and select ‘Finish this entity’
The field size will be shown in the ‘Area’ box of the measurements section of the active tools menu. It is also possible to freehand draw a shape to measure the area of, or use the headland measuring or parallel line measuring tools to measure length and area of other field characteristics.
Please note: the area of the field boundary in the mapping module does not have to match the area of the field in the cropping record.